Spare Power Supply Kit for Heating System 300W + 12V 55Ah battery

An uninterruptible power supply (UPS or inverter) for a heating system is a necessary component for any heating boiler and its system.
It protects the boiler's automatics and circulation pump from voltage surges that can damage the electronics, and ensures the operation of the heating system in the event of a power outage.
The kit includes a 12V 50Ah battery. The battery is sealed, so it does not require maintenance.
In the event of a voltage loss, the inverter immediately switches to operating mode and starts generating 230V AC pure sine wave from any 12V battery (maximum up to 120Ah).
When electricity from the network becomes available, the device charges the battery itself.
The inverter has LED light indicators.
If the heating system consumption is 60-70W, then using the 50Ah battery, the system will operate for up to 5 hours.