30.72kWh 12kW Solar Battery Off Grid System With Dual MPPT Charging

30.72kWh 12kW Off Grid Solar Battery System with Dual MPPT Charging

This off grid solar battery system combines 30.72kWh of LiFePO4 energy storage with a 12kW pure sine wave inverter and dual MPPT solar charging. It provides a larger daily energy reserve for sites where essential equipment must continue operating beyond the main solar-production period.

The system is suitable for remote homes, clinics, farms, workshops and small business locations that require organized solar charging, battery backup and optional generator or utility recovery charging.

Balance Daytime Solar with Overnight Loads

The 30.72kWh nominal battery capacity offers more energy reserve than the entry configuration, but the daily load calculation remains essential. Lighting, refrigeration, communications and other continuous equipment should be calculated across the full required operating period.

Flexible loads can be scheduled during stronger solar production, reducing the amount of battery energy used after sunset. This approach can improve the practical autonomy of the off-grid system without increasing battery capacity.

Use Two PV Inputs for Solar-Array Flexibility

The inverter provides two MPPT input channels rated at up to 5000W and 18A each. Separate inputs can be useful when solar panels face different directions or when the project uses two electrically independent strings.

The panel arrangement must remain within the documented 60–500Vdc MPPT range and 500Vdc maximum open-circuit voltage. Final string design should consider cold-weather open-circuit voltage.

The available solar energy should cover daytime consumption and replace the battery energy used overnight. Panel nameplate power alone does not guarantee adequate daily charging.

Generator Recovery and Load Priorities

A compatible generator or utility source can charge the battery when extended poor weather reduces solar production. The AC input accepts a 230Vac platform with automatic 50/60Hz detection.

Two AC output channels allow essential circuits to remain separate from flexible equipment. This makes it easier to preserve battery energy when the site must operate through the night or during low-solar periods.

Parallel inverter operation is supported when a project needs more than 12kW of AC output. Battery capacity, parallel quantity and load distribution should be reviewed together.

30.72kWh Off-Grid Planning Data

30.72kWh Off-Grid System FAQ

Will this provide longer backup than the 15.36kWh version?

Under the same load conditions, the larger nominal battery capacity provides a longer potential operating period.

Can daytime loads operate while solar energy charges the battery?

The system can manage solar energy for local loads and battery charging, subject to available PV power and system settings.

Can two roof orientations use separate MPPT inputs?

Yes, when both strings remain within the voltage, current and power limits of their respective inputs.

Is generator charging available?

A compatible generator may be used when its output meets the inverter’s AC input requirements.

What information determines off-grid autonomy?

Daily energy use, overnight loads, solar production, battery reserve and generator availability all affect autonomy.

Review the Full Daily Energy Cycle