Spare Power Supply Kit for Heating System 300W with 12V 42Ah Battery and LCD — electro base

Spare Power Supply Kit for Heating System 300W with 12V 42Ah Battery and LCD by electro base is a compact backup power solution designed to keep small heating units operational during mains interruptions. The kit combines a 300W inverter/charger with an integrated 12V 42Ah battery and an LCD display that provides an at-a-glance view of battery status and basic system information. Its form factor and power rating suit installation near heat pumps, boilers, or electric heaters where temporary power continuity is required.

Advantages

The kit provides uninterrupted power to heating devices for short-term outages and supports automatic switching between mains and battery power. The built-in LCD delivers clear information about battery voltage, charge status and inverter mode, simplifying monitoring and basic troubleshooting. With a 300W continuous output and a 12V 42Ah capacity, the system balances runtime and compact size to fit limited spaces and typical small residential or light-commercial heating loads.

Suitable for (tasks / use cases)

• Maintaining boiler control electronics and circulation pumps during short power failures
• Providing temporary power to electric heaters or convectors in small apartments or offices
• Ensuring uninterrupted operation of thermostats, controllers and valves in heating systems
• Use as a compact backup for remote or seasonal heating installations

Key specifications

• Inverter/charger continuous output: 300W
• Battery type: 12V lead-acid (42Ah) integrated
• Display: LCD showing battery voltage, charge level and basic system status
• Nominal system voltage: 12V DC
• Typical applications: small residential and light-commercial heating equipment
• Physical format: compact kit intended for close-coupled installation near heating equipment

How to use

Install the kit according to local electrical codes and the heating system manufacturer’s guidelines. Mount the unit in a dry, ventilated location close to the heating equipment to minimize DC cable runs. Connect the battery and inverter/charger to the heating device’s control circuit or the device’s auxiliary power input as applicable. When mains power fails, the inverter automatically supplies AC load from the battery; the LCD allows you to check voltage and charge at a glance. Regularly inspect connections and the battery display to ensure correct operation.

Usage recommendations

For reliable performance, place the kit where ambient temperature is stable and avoid exposure to direct sunlight or moisture. Periodically verify battery charge and perform maintenance per lead-acid battery guidelines, including checking terminal tightness and cleaning corrosion. Match the kit’s 300W rating against the actual power draw of connected heating components to avoid overload; for higher continuous loads, consider a larger capacity solution.