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Catalogue · 4 products

Home Battery Backup Systems

Home battery backup for a house that stays connected to the grid. Each system pairs a Growatt hybrid inverter with LiFePO4 battery storage and an automatic transfer switch, supplied as one matched package. It charges from your solar array or the grid, and takes over automatically when the grid goes down, then hands back when power returns.

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Compare home battery backup systems

Prices as of October 2026. Solar panels are not included; most homes adding backup already have an array or want it sized separately.

System Inverter Battery Backs up Price
Growatt Partial Home Backup Power System Growatt MIN 3.8 kW or 6 kW 5 or 10 kWh APX high-voltage Essentials sub-panel from $7,999.99
Growatt 11.4kW Whole Home Backup Power System Growatt MIN 11.4 kW 10 or 20 kWh APX high-voltage Main panel, including central air or an EV charger from $10,999.99
Growatt SPH 10kW + ALP battery Growatt SPH 10 kW split-phase hybrid ALP 5 kWh 48V modules Whole home or critical loads from $5,899.99
Growatt SYN 200-XH-US backup box For Growatt MIN XH inverters — 200A whole-home switchover with smart meter from $1,899.99

Partial home or whole home?

  • Partial home backs up an essentials sub-panel: fridge and freezer, furnace fan or boiler, well or sump pump, lights, internet and a few outlets. It needs a smaller inverter and battery, so it costs less.
  • Whole home backs up the main panel, so big loads like central air, an electric range or an EV charger keep working. It needs an 11.4 kW inverter and usually 20 kWh of storage or more.

How to size home battery backup

  1. List the loads you need in an outage and add their running watts; that sets the inverter size.
  2. Estimate daily energy: essentials typically use 8–10 kWh a day, a whole home 20–40 kWh.
  3. Choose hours of backup without sun: battery kWh ≈ daily kWh × hours ÷ 24 ÷ 0.9.
  4. Add solar to recharge the battery each day and stretch backup over several days.

Need more storage for a 48V system? See home solar batteries, including the GSL 14.34kWh. Or send us your panel and loads and we'll spec the system.

Home battery backup FAQs

How long can a home battery backup system power my house?

About a day of essentials per 10 kWh of storage at 8–10 kWh/day. A whole home uses battery much faster, so 20 kWh may cover 12–24 hours without solar. With solar recharging during the day, backup can run for days.

Does home battery backup work without solar panels?

Yes. The battery charges from the grid and takes over in an outage. Without solar, it runs until the battery is empty, then waits for grid power to return.

How fast does it switch over in an outage?

The transfer switch moves the house to battery automatically within a fraction of a second, so most appliances keep running without a restart.

Do I need an electrician?

Yes. A licensed electrician installs the inverter and transfer switch, and your utility approves the interconnection for a grid-tied system.

Not sure which one? Tell the finder what you need to run and it sizes a system from stock, with the reasoning shown.
Size a system → See all 4 products ↓

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Home Battery Backup Systems
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Common questions

Before you order.

If yours isn't here, ask an engineer. It costs nothing and it's the step most people skip.

What if I'm not sure this is the right product?

Ask before you order. Send us what you need to run, or your pool or well figures, and an engineer will confirm the choice — it costs nothing. Or use the finder below, which sizes from what you actually run and shows its reasoning.

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