20kWh Solar Power Storage for Homes | Intelligent Control | Reliable Backup Solution

This 20kWh residential solar battery project is a whole-home storage configuration built for rooftop solar integration. It combines a 20kWh lithium battery system, a 15kW energy storage inverter and intelligent energy management to store daytime solar energy for night-time use and deliver reliable backup during grid outages — supporting both grid-tied and off-grid household operation.

System Configuration

System Components

1. 20kWh Lithium Battery System

The 20kWh lithium battery bank stores surplus rooftop solar energy for night-time use and outage backup. Built-in BMS monitors every module in real time, balancing charge and protecting battery health. Long cycle life, modular structure, expandable as household demand grows. 3-year warranty, CE / IEC / UN38.3 certified. View battery details →

2. 15kW Energy Storage Inverter

The 15kW inverter coordinates solar generation, battery charging and household loads. Pure sine wave output with seamless switching between grid and backup modes keeps essential appliances running without interruption. 

3. Intelligent Energy Control

The control system automatically prioritizes solar self-consumption, schedules charging and discharging around household usage, and provides real-time status monitoring — keeping the home powered with minimal manual operation.

Why This Configuration Works for Home Backup

• 20kWh capacity carries a typical household through the night on stored solar energy and through extended outages on essential loads
• 15kW output runs multiple high-power appliances at once — air conditioning, refrigerator, oven and EV charging — without overload
• Automatic backup switching protects critical loads the moment the grid fails, with no perceptible interruption
• Modular expandability lets homeowners add capacity later without replacing the inverter or main system

Frequently Asked Questions

How long does the 20kWh battery last during an outage?

On essential loads — lighting, refrigerator, internet, fans and device charging — the 20kWh battery typically lasts 12–24 hours. Running full household loads including air conditioning shortens this to roughly 6–8 hours.

Can it be added to an existing rooftop solar system?

Yes. The storage inverter accepts PV input from standard rooftop arrays, so the battery system can be retrofitted onto an existing solar installation without replacing the panels.

Does the system work off-grid?

Yes. With the battery and storage inverter operating together, the system supports full off-grid use as well as grid-tied operation with backup, adapting to homes with weak or no reliable grid connection.

What warranty is included?

The battery and inverter carry a 3-year warranty. Remote monitoring, firmware updates and spare parts support are available through GreenMore and its installation partners.

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