SAI / UPS

What is a SAI / UPS and why is it vital in any installation?

A SAI it is a device that is interposed between the electrical network and your devices to meet two critical functions:

1. Instant backup: Before a blackout, the SAI it supplies energy from its internal microsecond batteries, avoiding sudden shutdown and data loss.

2. Network conditioning: Stabilizes tension, eliminating voltage peaks, surges and frequency drops that can burn power supplies and base plates.

In an increasingly digitized environment, the SAI it is the "life insurance" of servers, video surveillance systems, critical air conditioning equipment and high performance workstations.

Types SAI: Choose the technology according to your need

Not all SAI they protect in the same way. On Tienda Solar, we classified our range in the three standard industry technologies:

1. SAI OFF-LINE (or STANDBY)

It is the most basic and economical technology. The equipment only goes into operation when it detects a total supply failure.

• Ideal use: Domestic consumption equipment, routers, point of sale terminals (TPV) and unseenable devices.

• Limitation: Does not filter the slight fluctuations of the network; It only acts before the total cut.

2. SAI In-line (or line-interactive)

They incorporate a stabilizer (AVR) that corrects the voltage variations without the need to use the batteries, which lengthens the useful life of these.

• Ideal use: Small servers, office computers, video game consoles and solar monitoring systems.

• Advantage: Excellent balance between cost and protection.

3. SAI On-line double conversion (total protection)

It is high-end technology. The SAI it regenerates the electric wave constantly: converts the alternating network in continuous and then again in a perfect alternating. The teams always feed on inverter of the SAI, so the transfer time before a blackout is zero milliseconds.

• Ideal use: Data centers (CPD), medical equipment, laboratories, critical servers and industrial facilities.

• Advantage: Total protection against the 9 most common electrical problems.

How to choose the power of your SAI? (VA vs. W)

A common mistake is to confuse the Voltio-amps (VA) with the Watts (W).

• The WILL they represent the apparent power.

• The W they represent the actual power that your team consumes.

Golden rule of Tienda Solar: To ensure the longevity of the SAI, you should never charge it above 80% of your nominal capacity. If your teams consume a total of 800W, we recommend a SAI at least 1200VA or 1500VA to have margin of safety and autonomy.

Key factors for an intelligent purchase

Before deciding on a model, consider these technical aspects that determine long-term performance:

1. Wave type: pure or pseudosenoidal sine?

Equipment with power supplies with active PFCs (such as modern servers and high-end PC) require a pure sine wave (identical to that of the electrical network). The SAI economic Square or modified wave can cause noise or even the shutdown of the team trying to protect.

2. Autonomy and external battery banks

Most of the SAI they offer between 5 and 15 minutes of full load autonomy, enough time for a safe shutdown. However, if you need to maintain the operation for hours, we have models with connectors for additional battery modules.

3. Communication and remote management

Our SAI smart include USB ports or network cards (SNMP). This allows the SAI send a signal to the server to turn off automatically ordered before the batteries are depleted, in addition to sending you alert to the mobile if there is an electrical failure.

Comparison Table of Technologies SAI