The best offline intelligent UPS 3000va 1800w backup battery for  desktop computers provides complete power protection to protect  connected devices from surges, overvoltage, and undervoltage damage.

If there is an AC power supply, the Prostar computer will start a  backup power supply of 500VA – 3000VA, with a built-in battery to  directly transfer the AC power to the output load. Only in the event of  a power outage will it switch to the inverter within a few milliseconds  to supply power to the load until the main power supply is restored.

UPS 3000VA characteristics

Intelligent CPU control.

Low power consumption.

High voltage protection.

Automatic voltage regulation.

The cold start function allows the load to be powered solely by batteries.

Turn off the mode battery charging function.

Compatible with low-power loads, such as WiFi routers and  DSL modems.

Intelligent charging system with long battery life.
Automatic Voltage Regulation (AVR) can correct input voltage.
The built-in and external battery models have different backup times.
Optional USB communication port and RS232/RJ-11/RJ-45 interface.
Provide LED and LCD display panels for selection.
Multiple colors to choose from.
Spare battery
Provide sufficient power supply time for the device to shut down  normally in the event of a mains power failure. Helps prevent data  loss and minimize component stress caused by hard shutdowns.
Surge protection
Transfer excess voltage from sensitive electronic devices during AC  surges or power spikes to prevent damage.
CC/CV charger
The built-in CC charger can keep the battery charging at a constant  current during charging.
Equipped with a built-in CV charger, it maintains a constant battery level after being fully charged to ensure battery power.