300W, Pure Sine Wave Inverter - UPS, Backup Electricity for Heating Systems

A backup power supply (UPS or Inverter) ensures uninterrupted operation of the heating system in the event of a power outage. The Inverter also protects the boiler's automation and circulation pump from voltage surges that can damage the electronics.
When the voltage disappears in the network, the Inverter switches to operating mode in less than 0.01 second and starts generating 220V alternating current with a pure sine wave using a 12V battery.
When the mains voltage is restored, the device starts charging the battery, and then the inverter automatically returns to standby mode.
The inverter has an LCD display
Automatic Voltage Regulation (AVR) function stabilizes input voltage
Intelligent battery management that guarantees long-lasting battery life
The inverter operates fully automatically
If the power consumption of the required device is 60-70W, then:
:: using a 30Ah battery, it will run for up to 3 hours
:: using a 100Ah battery, it will run for up to 10 hours.