Brands

Inverters

What is a solar inverter?

Solar inverters are the components of a solar installation that convert the direct current generated from the solar panels to alternating current for the use of the consumption and loads of a home or an industrial warehouse. In Tienda Solar you will find all kinds of inverters (off-grid invertersgrid connected inverters and hybrid inverters), of different voltages (12V-24V-48V), different brands (Victron, SMA, Huawei, Sungrow, GoodWee, etc...) and all at a very competitive price. For technical information on inverters go to the bottom of the page.

Inverters

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Axpert VM III 6000-48V solar charger inverter

Save your unit for June

Solar charger inverter for isolated installations from 6000W to 48V single-phase with Wifi connection to be able to connect solar battery bank (of any technology) of the corresponding voltage (48V). The Axpert VM III 6K has a single MPPT (maximum power monitoring point) and provides a performance of 93.0%. The maximum input current of the solar regulator is 120A, minimum starting voltage of inverter solar is 120Vdc and maximum power of solar panels is 6000W.

This inverter the 6kW (kVA) Axpert VM III solar charger offers a 2-year product warranty and CE certification.

Hybrid Solar Inverter Growatt SPH 6000TL-XH- 48V single phase

This inverter provides up to SPH 6000TL-XH- 48V of output power. Max. 98.4% efficiency. They are also compatible with lithium batteries so they can be installed together. 5 years warranty with the possibility of extension to 10 years, subject to manufacturer\'s conditions.

Regarding the Growatt SPH 6000TL-48V inverter, it should be noted that it has numerous electrical protection systems that make it one of the safest domestic inverters for solar consumption at home. Its main features include polarity inversion, anti-islanding protection, over current, short-circuit and over voltage protection, excessive temperature rise, among others. This inverter is guaranteed for 5 years and can be extended up to 10 years.

Hybrid Solar Inverter Growatt SPH 5000TL-XH- 48V single phase

This inverter provides up to SPH 5000TL-XH- 48V of output power. Max. 98.4% efficiency. They are also compatible with lithium batteries so they can be installed together. 5 years warranty with the possibility of extension to 10 years, subject to manufacturer\'s conditions.

Regarding the Growatt SPH 5000TL-48V inverter, it should be noted that it has numerous electrical protection systems that make it one of the safest domestic inverters for solar consumption at home. Its main features include polarity inversion, anti-islanding protection, over current, short-circuit and over voltage protection, excessive temperature rise, among others. This inverter is guaranteed for 5 years and can be extended up to 10 years.

Solar Inverter Victron EasySolar-II 48/5000/70-50 GX

In stock

Self-consumption solar inverter Victron EasySolar-II 48V and 5000W.

The solar inverter EasySolar-II combines the functions of the solar inverter MultiPlus-II and a solar charge controller SmartSolar MPPT Tr. It includes a GX device with display.

All of the above elements, previously connected, simplify the installation and save both time and money.

The display shows data about the solar inverter, solar battery and solar charge controller. You can connect your installation to an iOS or Android device and manage it remotely at any time.

Solar inverter Victron EasySolar-II 48/3000/35-32 GX

In stock

Self-consumption solar inverter Victron EasySolar-II 48V and 3000W.

The solar inverter EasySolar-II combines the functions of the solar inverter MultiPlus-II and a solar charge controller SmartSolar MPPT Tr. It includes a GX device with display.

All of the above elements, previously connected, simplify the installation and save both time and money.

The display shows data about the solar inverter, solar battery and solar charge controller. You can connect your installation to an iOS or Android device and manage it remotely at any time.

Solar Inverter Victron MultiPlus-II 48/15000/200-100

In stock

Self-consumption solar inverter Victron Multiplus-II 48V and 15kW.

The solar inverter MultiPlus-II combines the functions of the solar inverter MultiPlus and the solar inverter MultiGrid.

It has all the features of the solar inverter MultiPlus plus the option of installing an external current transformer to enable PowerControl and PowerAssist and to optimise self-consumption with external current sensor (max. 100A).

It also has all the features of the solar inverter MultiGrid with integrated anti-islanding and a growing list of countries that have already approved it.

Solar Inverter Victron MultiPlus-II 48/10000/140-100

In stock

Self-consumption solar inverter Victron Multiplus-II 48V and 10kW.

The solar inverter MultiPlus-II combines the functions of the solar inverter MultiPlus and the solar inverter MultiGrid.

It has all the features of the solar inverter MultiPlus plus the option of installing an external current transformer to enable PowerControl and PowerAssist and to optimise self-consumption with external current sensor (max. 100A).

It also has all the features of the solar inverter MultiGrid with integrated anti-islanding and a growing list of countries that have already approved it.

Solar Inverter Victron MultiPlus-II 48/8000/110-100

In stock

Self-consumption solar inverter Victron Multiplus-II 48V and 8kW.

The solar inverter MultiPlus-II combines the functions of the solar inverter MultiPlus and the solar inverter MultiGrid.

It has all the features of the solar inverter MultiPlus plus the option of installing an external current transformer to enable PowerControl and PowerAssist and to optimise self-consumption with external current sensor (max. 100A).

It also has all the features of the solar inverter MultiGrid with integrated anti-islanding and a growing list of countries that have already approved it.

Solar Inverter Victron MultiPlus-II 48/3000/35-32

In stock

Self-consumption solar inverter Victron Multiplus-II 48V and 3kW.

The solar inverter MultiPlus-II combines the functions of the solar inverter MultiPlus and the solar inverter MultiGrid.

It has all the features of the solar inverter MultiPlus plus the option of installing an external current transformer to enable PowerControl and PowerAssist and to optimise self-consumption with external current sensor (max. 100A).

It also has all the features of the solar inverter MultiGrid with integrated anti-islanding and a growing list of countries that have already approved it.

Solar Inverter Charger Victron Multiplus 48/5000/70-100

In stock

Solar Inverter Victron Multiplus 48V and 5000W.

The solar Inverter Charger MultiPlus groups 48/5000/70-100 their compact housing, resistant sine wave inverter 4000W (10000W peak power) for 48V solar battery systems, a battery charger with sophisticated technology variable 70A and a transfer switch AC high speed 100A

Solar Inverter Charger Multiplus Victron 48/500/6-16

In stock

The Solar Inverter Charger MultiPlus groups 48/500/6-16 their compact housing, resistant sine wave solar inverter 430W (900W peak power) for 48V solar battery systems, a solar battery charger with sophisticated technology variable 6A and a transfer switch AC high speed 16A

Solar inverter DEYE Hybrid 12kW

Reserve your unit for March!

Three-phase grid-connected hybrid solar inverter that allows the charging of solar batteries either through solar panels or from the grid. The DEYE Hybrid model of 12kW, allows output powers up to 12000W AC and connect up to 15600W of photovoltaic panel power. Solar inverter compatible with batteries Pylontech of 48 V. Its 2 MPPTs allow the optimisation of the energy produced by the solar panels. It has protection against overcurrent, overload, ground failure monitoring, DC injection monitoring and RCD and high temperature protection. This inverter it can work both connected to the network and isolated. The product is guaranteed for 10 years.

Solar inverter DEYE Hybrid 10kW

Reserve your unit for March!

Three-phase grid-connected hybrid solar inverter that allows the charging of solar batteries either through solar panels or from the grid. The 10kW DEYE Hybrid model, allows output powers up to 10000W AC and connects up to 13000W of photovoltaic panel power. Solar inverter compatible with batteries Pylontech of 48 V. Its 2 MPPTs allow the optimisation of the energy produced by the solar panels. It has protection against overcurrent, overload, ground failure monitoring, DC injection monitoring and RCD and high temperature protection. This inverter it can work both connected to the network and isolated. The product is guaranteed for 10 years.

Solar inverter DEYE Hybrid 6kW

In stock

Single-phase grid-connected hybrid solar inverter that allows the charging of solar batteries either through solar panels or from the grid. The 6kW DEYE Hybrid model, allows output powers up to 6000W AC and connect up to 7800W of photovoltaic panel power. Solar inverter compatible with batteries Pylontech of 48 V. Its 2 MPPTs allow the optimisation of the energy produced by the solar panels. It has protection against overcurrent, overload, ground failure monitoring, DC injection monitoring and RCD and high temperature protection. This inverter it can work both connected to the network and isolated. The product is guaranteed for 10 years.

Solar inverter DEYE Hybrid 5kW

In stock

Single-phase grid-connected hybrid solar inverter that allows the charging of solar batteries either through solar panels or from the grid. The 5kW DEYE Hybrid model, allows output powers up to 5000W AC and connect up to 6500W of photovoltaic panel power. Solar inverter compatible with batteries Pylontech of 48 V. Its 2 MPPTs allow the optimisation of the energy produced by the solar panels. It has protection against overcurrent, overload, ground failure monitoring, DC injection monitoring and RCD and high temperature protection. This inverter it can work both connected to the network and isolated. The product is guaranteed for 10 years.

Solar inverter charger Axpert MKS IV 5.6K-48V

Solar charger inverter for isolated installations from 5600W to 48V single-phase to connect solar batteries of the corresponding voltage

The Axpert MKS IV 5.6K features a single MPPT (maximum power tracking point) and provides 93% performance. The maximum solar controller input current for this product is 120A

This type of solar charger inverter, such as the Axpert VM 5000W at 48V, integrates the MPPT charge controller and can be configured series of solar panels of both 60 and 72 cells.

Axpert MKS IV 5600W-48V solar charger inverter offers 2-year product warranty and CE certificate

Hybrid Solar Inverter Growatt SPH 3000TL-XH- 48V single phase

This inverter provides up to SPH 3000TL-XH- 48V of output power. Max. 98.4% efficiency. They are also compatible with lithium batteries so they can be installed together. 5 years warranty with the possibility of extension to 10 years, subject to manufacturer\'s conditions.

Regarding the Growatt SPH 3000TL-48V inverter, it should be noted that it has numerous electrical protection systems that make it one of the safest domestic inverters for solar consumption at home. Its main features include polarity inversion, anti-islanding protection, over current, short-circuit and over voltage protection, excessive temperature rise, among others. This inverter is guaranteed for 5 years and can be extended up to 10 years.

Solar inverter Axpert King ll 5000-48V

Inverter solar charger for off-grid installations of 5000W at 48V single-phase to connect 48V solar battery banks. The Axpert King ll 5K has a single MPPT (maximum power point tracking) and provides an efficiency of 94%. The maximum input current of the solar controller is 100A.

The Axpert King ll integrates the MPPT charge controller with removable display, bluetooth (mobile app available) and the possibility to connect 9 solar inverters in parallel to increase the power capacity to 45kW. Automatic generator set start-up. DC voltage from 110 to 280V and up to 6000W input solar panel.

2 year product warranty and CE certificate.

Hybrid Solar Inverter Solis EH1P6K-L de 6kW-48V

Solar inverter hybrid single phase Solis 6 kW and 48 V of the EH-L series. INCLUDING BACK UP + ENERGY METER

A single-phase hybrid grid-connected solar inverter Solis a 6000W battery can be connected to a 48V lead-acid or lithium battery. With an efficiency of over 98.8% and 2 MPPT’s, it allows connecting up to 8000W of solar power with a maximum input voltage of 600V.

The series of single-phase hybrid inverters Solis they are a highly recommended choice for both on- and off-grid storage solutions, having an integrated BMS system to increase battery reliability. It has protection against short circuits, overloads and high temperatures.

Their warranty is 5 years and they are certified within the international framework.

Hybrid Solar Inverter Solis EH1P5K-L de 5kW-48V

Solar inverter hybrid single phase Solis 5 kW and 48 V of the EH-L series. INCLUDING BACK UP + ENERGY METER

A single-phase hybrid grid-connected solar inverter Solis 5000W allows for the connection of lead-acid or 48V lithium batteries. With an efficiency of over 98.8% and 2 MPPT’s, it allows connecting up to 8000W of solar power with a maximum input voltage of 600V.

The series of single-phase hybrid inverters Solis they are a highly recommended choice for both on- and off-grid storage solutions, having an integrated BMS system to increase battery reliability. It has protection against short circuits, overloads and high temperatures.

Their warranty is 5 years and they are certified within the international framework.

Hybrid Solar Inverter Solis EH1P4.6K-L de 4.6kW-48V

Solar inverter hybrid single phase Solis of 4,6 kW and 48 V of the EH-L series. INCLUDING BACK UP + ENERGY METER

A single-phase hybrid grid-connected solar inverter Solis a 4600W battery can be connected to a 48V lead-acid or lithium battery. With an efficiency of over 98.8% and 2 MPPT’s, it allows connecting up to 8000W of solar power with a maximum input voltage of 600V.

The series of single-phase hybrid inverters Solis they are a highly recommended choice for both on- and off-grid storage solutions, having an integrated BMS system to increase battery reliability. It has protection against short circuits, overloads and high temperatures.

Their warranty is 5 years and they are certified within the international framework.

Hybrid Solar Inverter Solis EH1P3K-L de 3.6kW-48V

Solar inverter hybrid single phase Solis of 3,6 kW and 48 V of the EH-L series. INCLUDING BACK UP + ENERGY METER

A single-phase hybrid grid-connected solar inverter Solis 3600W allows for the connection of lead-acid or 48V lithium batteries. With an efficiency of over 98.8% and 2 MPPT’s, it allows connecting up to 7000W of solar power with a maximum input voltage of 600V.

The series of single-phase hybrid inverters Solis they are a highly recommended choice for both on- and off-grid storage solutions, having an integrated BMS system to increase battery reliability. It has protection against short circuits, overloads and high temperatures.

Their warranty is 5 years and they are certified within the international framework.

Hybrid Solar Inverter Solis EH1P3K-L de 3kW-48V

Solar inverter hybrid single phase Solis 3 kW and 48 V of the EH-L series. INCLUDING BACK UP + ENERGY METER

A single-phase hybrid grid-connected solar inverter Solis a 3000W battery can be connected to a 48V lead-acid or lithium battery. With an efficiency of over 98.8% and 2 MPPT’s, it allows connecting up to 7000W of solar power with a maximum input voltage of 600V.

The series of single-phase hybrid inverters Solis they are a highly recommended choice for both on- and off-grid storage solutions, having an integrated BMS system to increase battery reliability. It has protection against short circuits, overloads and high temperatures.

Their warranty is 5 years and they are certified within the international framework.

Solar Inverter Victron MultiPlus-II 48/5000/70-50

Inverter Solar Charger for self-consumption Victron Multiplus-II 48V and 5000W.

The MultiPlus-II solar inverter combines the functions of the MultiPlus solar inverter and the MultiGrid solar inverter .

It has all the features of the MultiPlus solar inverter plus the option to install an external current transformer to enable PowerControl and PowerAssist and optimize self-consumption with external current sensor (max. 100A).

It also has all the features of the MultiGrid solar inverter with built-in anti-islanding and a growing list of countries that have already approved it.

Solar inverter charger Axpert VM IV 5600-48V

Out of stock

Solar charger inverter for isolated installations from 5600W to 48V monophasic to be able to connect solar battery bank of corresponding voltage (48V). The Axpert VM IV 5.6K has a single MPPT (maximum power tracking point) and provides a performance of 93.0%. The maximum input current of solar regulator is 120A.

The Axpert VM IV 5600W 48V integrates the MPPT load regulator and can be configured with up to 6,000 Wp. This model, unlike the Axpert 3K, does have the generator set start function for hybrid solar installations.

This inverter the Axpert VM IV 5,6kW (kVA) solar charger offers a 2-year product warranty and CE certification.

Hybrid inverter SAJ H1 6KW 2MPPT 48V

SofarSolar 7,5KTLM-G2 single-phase solar inverter for grid-connected. The 7500W AC SofarSolar model allows to connect 9980W of solar panel power with 2 MPPT and a maximum input voltage of 600V and maximum current of 22A/11A per MPPT. Built-in zero export function and built-in sound and light alarma function.

The SofarSolar 7,5KTLM-G2 inverter has an efficiency of 98,2% and a product warranty of 10 years, as a high quality inverter.

Hybrid Inverter GW3648-EM -single phase

Goodwe 3648-EM single-phase grid-tie hybrid solar inverter that allows charging of solar batteries either through the solar panels or from the grid. The GoodWe 3600W AC model allows to connect 4600W of solar panel power with a maximum input voltage of 550V and maximum current of 11A.

This solar inverter is compatible with 48V batteries such as the Pylontech US2000 and US3000 or other lithium batteries of the same nominal voltage, its  2 MPPT\'s allow the optimization of the energy produced by the solar panels either for self-consumption or to charge the solar batteries.

The GoodWe GW3648-EM inverter has an efficiency of 97.7% and a product warranty of 5 years. High quality hybrid inverter compatible with 48V lithium batteries.

Solar inverter charger Axpert King 5000-48V With integrated Wifi

Inverter solar charger for off-grid installations of 5000W at 48V single-phase to be able to connect solar battery banks of the corresponding voltage (48V).

The Axpert King 5K has a single MPPT (maximum power point tracking) and provides an efficiency of 93.0%. The maximum input current of the solar controller is 80A. The Axpert King 5000W-48V integrates the MPPT charge controller with removable display and the possibility to connect 9 solar inverters in parallel. Automatic generator set start-up. DC voltage from 60 to 115Vdc and up to 4000W solar panel input.

This Axpert King 5kW (kVA) solar inverter charger offers a 2-year product warranty and CE certification .

Solar inverter charger Axpert MKS 5KP-48V

Next arrival end of September

Solar charger inverter for off-grid installations of 5000kVA to 48V monophase can connect bank of solar batteries of the corresponding voltage. The Axpert MKS 5K also has a single MPPT(Maximum Power Tracking Point) and provides an efficiency of 90.0%. The maximum solar regulator input current for this product is up to 80A

This type of solar charger inverter at 48V integrates the MPPT charge controller and can be configured for a series of solar panels with either 60 or 72 cells. This model, unlike the Axpert VM with the same power, does have a generator start function for hybrid solar installations

The Axpert model integrates assigned voltages in ranges from 170 V to 280 V

The solar charger inverter offers a 2-year product guarantee and is CE certified.

Solar inverter charger Axpert VM III 5000-48V

Next arrival April

Solar charger inverter for isolated installations from 5000W to 48V single phase with Wifi connection to be able to connect solar battery bank of corresponding voltage (48V). The Axpert VM III 5K has a single MPPT (maximum power tracking point) and provides a performance of 93.0%. The maximum input current of solar regulator is 60A

This inverter the 5kW (kVA) Axpert VM III solar charger offers a 2-year product warranty and CE certification.

Hybrid Inverter own consumption Ingeteam Ingecon Sun Storage 6TL M

Hybrid Inverter own consumption Ingeteam Ingecon Sun Storage 6TL

The Sun Storage 6TL has 4 modes of operation and can be used in isolated and grid connected systems, up to a maximum solar power of 10,000 Wp. This inverter also has a technology that controls the charging and discharging of the storage system, lengthening the maximum life of the battery system.

Hybrid Inverter self-consumption Ingeteam Ingecon Sun Storage 3TL

Hybrid Inverter self-consumption Ingeteam Ingecon Sun Storage 3TL

The Sun Storage 3TL has 4 modes of operation and can be used in isolated and grid connected systems, up to a maximum solar power of 6500 Wp. This inverter also has a technology that controls the charging and discharging of the storage system, lengthening the maximum life of the battery system.

Solar inverter SMA Sunny Island 8.0H

Single-phase solar inverter for isolated installation, with solar batteries, SMA of 8000W AC, with 95.8% efficiency and maximum input current in AC of 50A

The 6.0H model integrates assigned voltages in ranges from 172.5 V to 264.5 V, being able to work with a maximum alternating current to optimize the self-consumption, in network operation, up to 50 A, with a maximum power of 6kVA

As a backup system, it can work at 5430W in AC with a rated current of 50A and at 6,000W for 30 minutes.It incorporates a solar battery connection with 48 V configuration and manages battery charges at 140A and discharges at 130A

It Allows for the interconnection of lithium-ion batteries such as solar lead-acid batteries.The Sunny Island offers a 2 year product warranty and is CE certified

Solar inverter SMA Sunny Island 6.0H

Single-phase solar inverter for isolated installation, with solar batteries, SMA of 6000W AC, with 95.8% efficiency and maximum input current in AC of 50A

The 6.0H model integrates assigned voltages in ranges from 172.5 V to 264.5 V, being able to work with a maximum alternating current to optimize the self-consumption, in network operation, up to 20 A, with a maximum power of 4.6kVA

As a backup system, it can work at 4,600W in AC with a rated current of 20A and at 6,000W for 30 minutes.It incorporates a solar battery connection with 48 V configuration and manages battery charges at 110 A and discharges at 103 A

It Allows for the interconnection of lithium-ion batteries such as solar lead-acid batteries.The Sunny Island offers a 2 year product warranty and is CE certified

Solar inverter SMA Sunny Island 4.4M

Single-phase photovoltaic inverter for isolated installation, with solar batteries, SMA of 4400W AC, with 95.5% efficiency and maximum input current in AC of 50A

The Sunny Island inverters allow a multitude of combinations to adapt to specific needs, requiring very low self-consumption of operation with IP54 protection

The 4.4M model integrates assigned voltages in ranges from 172.5 V to 264.5 V, being able to work with a maximum CA to optimize the self-consumption, in network operation, up to 14.5 A, with a maximum power of 3.3kVA

As a backup system, it can work at 3300W in AC with a rated current of 14.5A and at 4400W for 30 minutes

The Sunny Island offers a 2-year product warranty and is CE certified

Hybrid Inverter GW5048-EM -single phase

Goodwe 5048-EM single-phase grid-tie hybrid solar inverter that allows charging of solar batteries either through the solar panels or from the grid. The GoodWe 50000W AC model allows to connect 6000W of solar panel power with a maximum input voltage of 550V and maximum current of 11A.

This solar inverter is compatible with 48V batteries such as the Pylontech US2000 and US3000 or other lithium batteries of the same nominal voltage, its  2 MPPT\'s allow the optimization of the energy produced by the solar panels either for self-consumption or to charge the solar batteries.

The GoodWe GW5048-EM inverter has an efficiency of 97.7% and a product warranty of 5 years. High quality hybrid inverter compatible with 48V lithium batteries.

Hybrid Inverter GW3048-EM -single phase

Goodwe 3048-EM single-phase grid-tie hybrid solar inverter that allows charging of solar batteries either through the solar panels or from the grid. The GoodWe 3000W AC model allows to connect 3900W of solar panel power with a maximum input voltage of 500V and maximum current of 11A.

This solar inverter is compatible with 48V batteries such as the Pylontech US2000 and US3000 or other lithium batteries of the same nominal voltage, its MPPT allow the optimization of the energy produced by the solar panels either for self-consumption or to charge the solar batteries.

The GoodWe GW5048-EM inverter has an efficiency of 97.7% and a product warranty of 5 years. High quality hybrid inverter compatible with 48V lithium batteries.

What is a solar inverter in detail?

As we have explained in the heading of this category, a solar inverter is in charge of transforming the direct current of the solar panels into alternating current for later use. The vast majority of the equipment used in the home and in the industries is supplied with alternating current with a given voltage and frequency (230V in single-phase and 50Hz in Spain) parameters that are not those given by the continuous part of the photovoltaic panels. The solar inverter is therefore in charge of carrying out the necessary transformations and adjustments so that our equipment can be powered by solar energy.

What are the types of solar inverters?

There are three main types of string solar inverters on the market:

Solar inverters for grid connection: this type of inverter is used in solar installations that are connected to the grid and can be synchronised with the voltage (V) and frequency (Hz) parameters of the grid.

Solar inverters for off-grid installation: as their name suggests, they are suitable for solar installations that are not connected to the grid. This type of inverter is capable of operating under a "grid" that it generates itself with the optimum voltage (V) and frequency parameters for use in conventional electrical appliances.

Hybrid inverters: Hybrid inverters are typically used in systems that need to operate both on and off the grid. They are often used in hybrid installations where the system can be connected to a grid, to different types of generators or operate temporarily as a stand-alone system. Typically, hybrid solar inverters can operate and manage batteries of different technologies, performing the function of back-up (backup system) when there is no solar generation or grid. Hybrid inverters can be grid-connected or stand-alone (without the need for a grid to synchronise with).

What to consider when choosing a solar inverter?

There are many brands, models and types of solar inverters on the market. But what should be taken into account when choosing a solar inverter?

Type of installation: Will our inverter be installed in a grid-connected or off-grid installation? Do we want to connect batteries and/or an electric generator to make our installation hybrid? Based on the above description, we will have to choose whether we need a grid-connected, off-grid or hybrid inverter (grid-connected or hybrid).

Inverter power: Depending on the needs and configuration of our solar installation, we will have to choose the power of the inverter that corresponds. The power of the inverter is usually stipulated in its description or name. It refers to the power in watts or kilowatts (or VA depending on the power factor) that the alternating current part of the inverter is capable of providing given a voltage, frequency and at a standard ambient temperature.

Depending on the loads we want to feed on the AC side, we will have to choose one power or another. It is important to note that the inverters also specify in their technical data sheet the power to be connected on the DC side, i.e. the solar panels. This power is given in Wp or kWp as the photovoltaic panels are expressed in peak power, the maximum power that the panel is capable of providing under certain circumstances of temperature and irradiation that are considered standard, although they are not very common.

This is why the power of panels is usually over-dimensioned with a DC/AC ratio that each inverter manufacturer describes in its technical data sheet. Generally, when it comes to maximising the generation of the solar system, the power of the solar panels in peak power is higher than the inverter power in Wac or VA. In this way we ensure that the inverter works most of the time providing the maximum AC power output. In the event that there is too much solar power and the inverter is reaching its limit, it performs the "clipping" action, which is to limit the solar input power and keep the output at the maximum.

Inverter input voltage (PV/Battery): In the case of the inverter voltage, we must understand what the solar installation will be like (grid/isolated/hybrid) and what loads and consumption it will be connected to.

In the case of off-grid installations or installations with battery storage, depending on each case, it will be more suitable to use:

- 12V solar inverters: usually for small installations of no more than 2000W. A low voltage (12V) implies more wiring to reduce losses, so this voltage is usually used for installations that mount batteries with low storage capacity, i.e. small installations.

- 24V solar inverters: usually for medium-sized installations of no more than 5000W.

- 48V solar inverters: usually for medium and large installations, up to 10000W. Although for very large installations it is usual to go to higher voltages, the standard step ends at 48V, beyond that the solutions are customised and with inverters that allow a varied range of voltages.

Maximum and output current of the inverter: It is important to know the maximum input current (DC) and output current (AC) of the inverter in order to understand how the strings/module chains should be designed on the DC side and to understand what overcurrent protections may be necessary on both the AC and DC sides.

MPPT number (if applicable): The MPPT number (Maximum Power Point tracking), also known as the number of MPPT trackers, refers to the number of solar panel string inputs that an inverter has in which the maximum power point tracking is performed, i.e. independently optimised.

Each series or string is the union of photovoltaic panels with a given current (I of the modules in the string) and a voltage given as the sum of the voltages of the panels connected in series (V).Therefore, a string will have a current and a voltage (V and I) corresponding to an inverter input. The MPPT consists of a series of electronic components capable of constantly searching for the combination of voltage and current that provides the highest possible power for each input.

Given that the production of the panels varies according to the radiation incident on them and the temperature, a greater number of inverter MPPTs will ensure greater performance of the panels of the entire solar installation.Moreover, the solar panels can be mounted with different orientations or inclinations only if each of these groups of modules is connected to a different MPPT tracker. So, for example, if we have a gable roof where we want to mount solar panels on both sides, we will look for an inverter with at least 2 MPPT inputs.

Efficiency: It is important to look for a solar inverter with a high direct current (DC) to alternating current (AC) conversion efficiency. The higher the efficiency of the solar inverter, the lower the losses and the faster the return on investment.Solar inverters already have high efficiency levels of around 95%.In any case, 1% or 2% more efficiency is an important difference when we are talking about long lifetimes. 

Monitoring and communication system: Opt for a solar inverter that offers a real-time monitoring system.This will allow you to monitor the performance of the solar installation and detect problems quickly.Some solar inverters offer online communication options or mobile applications to facilitate monitoring and performance.

Durability and Warranty: As we have already mentioned, it is very important to purchase an inverter from a first class manufacturer. The solar inverter is a critical piece of equipment because if it breaks down, the entire solar installation will be shut down, unlike solar panels. It is important to take into account when making any purchase of a solar inverter the years of warranty provided by the manufacturer. If appropriate in some cases inverter warranty extensions are available.

Battery Compatibility: If you want to install a hybrid solar installation using solar batteries, it is important to verify that the batteries and the inverter are compatible. Each battery manufacturer establishes a list of solar inverters with which their batteries are compatible. It is important to check compatibility to avoid communication problems between the inverter and the BMS (Battery Management System) of the batteries. 

Installation and Location: Installation and Location:For the installation of the solar inverter verify that the degree of protection is at least IP65.  It is also important to consider the ambient temperature at which the inverter will operate as well as ensuring good ventilation.

Inverter life and replacement

Solar inverters can have a life of more than 10 years without any problems. Depending on the conditions of use of the inverter and certain random parameters, the lifetime can be more or less than 10 years.

Typically, solar inverter manufacturers give factory warranties of 2 to 10 years. However, these can be extended by an additional 5 or 10 years by purchasing so-called "warranty extensions" from solar manufacturers or distributors such as Tienda Solar.

It is common in the industry for inverters to have a life of 10 years, and in the financial and life cycle approaches of solar installations it is often assumed that solar inverters will be replaced after 10 years. It is important to mention that this replacement is a reasonable assumption given the failure rate of these components and the experience accumulated in the industry over time.

What are the best brands of solar inverters?

There is a wide variety of brands on the market and it is true that sometimes it is difficult to choose which of them is the most suitable for our installation. Just as in the case of solar panels there is a classification of brands and manufacturers (the so-called Tier's published by Bloomberg) there is no such classification for solar inverters.

From Tienda Solar and given our experience in the sector (construction and operation of solar plants) we have selected a number of brands that offer good long-term performance and competitive prices. We usually recommend brands such as SMA, Victron, TBS, Studer, Solax, SAJ, Deye, GoodWe, SUNGROW, Huawei, Fronius, Solaredge, Kaco and Ingeteam. Some of them are cheaper than others, but the catalogue available on our website will ensure an efficient and long-lasting operation of your solar installation.

How many solar panels can be connected to an inverter?

The number of solar panels that can be connected to an inverter depends on several factors, including the inverter's rated capacity, the electrical configuration of the system and local conditions. Here are some points to consider:

  • - Inverter capacity: Each inverter has a maximum rated capacity in terms of power output. This capacity is expressed in watts (W) or kilowatts (kW). The number of solar panels you can connect depends on the inverter's capacity. This is why the data sheets of solar inverters are divided into PV Power and Power Output. Solar power (also called PV input power) is expressed in Wp/kWp in the same way as solar panel power is expressed. Since panels rarely operate at their maximum power, inverters allow the input power to be oversized in Wp. Usually the input power in Wp is between 30% or 50% higher than the AC power. For example, if you have a 5 kW (5kWac) inverter, you could connect a number of panels adding up to 6.5kWp (+30%) or 7.5kWp depending on what the solar inverter manufacturer indicates.
  • - Panel size and power: Solar panels vary in size and power. Larger and more powerful panels will generate more electricity, so the number of panels you can connect will depend on the total power you can handle with the inverter on the DC side (PV/solar input).
  • - Electrical configuration: The way you connect the solar panels, either in series or in parallel, can influence the amount you can connect. Connecting panels in series increases the total system voltage, while connecting them in parallel increases the current. Make sure that the configuration is compatible with the capacity of the inverter. To do this, check that the maximum current that the solar inverter accepts per MPPT is always higher than the current of the string/s being connected. Similarly we have to verify that the string voltage is the same as the voltage accepted by the solar inverter (usually 1000Vdc or 1500Vdc).
  • - Operating conditions: Weather and solar radiation conditions also affect the power generation of the solar panels. You may need to adjust the number of panels according to these conditions so as not to overload the inverter.
  • - Regulatory and technical considerations: Local regulations and standards may influence the number of solar panels that can be connected to an inverter. It is important to comply with electrical and safety regulations in your area.

In general, it is recommended to work with a solar installer or professional in the field to determine how many solar panels can be connected to a specific inverter. They can make accurate calculations taking into account all relevant factors and ensure that the system is configured safely and efficiently.

In addition to the different types of solar string inverters, there are other types for residential and commercial solar installations and others for large solar plants. 

 What other types of solar inverters are there?

Central Inverters: These are inverters typically with power ratings between 1MW to 5MW used in the design and construction of large solar power plants (also called solar farms). These solar inverters have a large size (approximately the dimensions of a 20-foot container) and centralise the conversion from direct current to alternating current on a large scale. Central inverters tend to be more efficient in terms of cost per W compared to smaller string inverters or micro inverters. By concentrating the power conversion in a single device, they can achieve high levels of efficiency and DC/AC ratios compared to other types of solar inverters. 

Micro Inverters: Instead of using a single solar inverter for each string or string string concatenation, micro solar inverters are installed on the back of the solar panels to perform the DC to AC conversion individually. This allows each solar panel to operate independently and optimises energy production. If one solar panel, for example, is not working properly or is shaded, this does not affect the overall solar installation. The output of the micro inverters is already in alternating current, so there is no need for a large amount of cable to connect the output of the inverters to the power supply of the house or industry.

Battery inverters: These are inverters designed specifically for solar battery systems or energy storage. These inverters allow for efficient charging and discharging of batteries. Solar batteries store electricity in direct current, so a solar inverter is needed to be able to use the stored energy either in a home or industry. In this case the batteries can be charged either from the grid, with a generator or with solar energy but this does not necessarily have to be present.

In any case, if you would like more information, please do not hesitate to contact us at info@tienda-solar.es.