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Buying guide: buying a home battery

A home battery stores electricity from your solar panels, or from the grid during cheap hours, so you can use it yourself later. Below you can read in a few minutes which type suits you, how much capacity you need and what to look out for.

Plug-in home battery or fixed home battery?

View the plug-in home batteries or the fixed home batteries. The full comparison is in Plug-in or fixed: which home battery suits you?

How many kWh do you need?

Check in your smart meter app how much you use in the evening and at night, and how much you feed back to the grid during the day. The smaller of those two figures is a good starting point for the capacity. If in doubt, start a little smaller: most models can be expanded later with expansion modules. Calculation examples are in How many kWh of home battery do you need?

1-phase or 3-phase?

One main fuse in your meter cupboard means 1-phase, three means 3-phase. A plug-in home battery works on one phase. A fixed home battery must match your connection and your inverter. This is how to see what you have: Home battery: 1-phase or 3-phase?

P1 smart meter dongle or CT clamp?

The battery needs to know what your home consumes and generates. It measures this via the P1 port of your smart meter, or with a CT clamp in the meter cupboard. Many models include the meter. See P1 meter or CT clamp: which meter does your home battery need?

Why now: net metering ends in the Netherlands in 2027

After the end of the Dutch net-metering scheme (salderingsregeling), you can no longer offset the electricity you feed back against your consumption, and many Dutch suppliers charge feed-in costs. A home battery stores your solar power from the day for the evening. With a dynamic energy contract, it also charges during cheap hours. Read Net-metering scheme ends in 2027, Avoiding feed-in costs and Home battery and dynamic energy contract.

Connect it yourself or have it installed?

You connect a plug-in home battery yourself, without an installer. A fixed home battery, such as the Marstek Venus X, is connected to the electrical panel by a certified installer; in the Netherlands we arrange this via a quote. Request a quote and we will look at your consumption, your connection and your solar panels with you.

Frequently asked questions

Does a home battery work without solar panels?

Yes, with a dynamic energy contract. The battery charges during the cheap hours and supplies power during the expensive hours.

What happens during a power cut?

A plug-in home battery only keeps the devices connected to the backup power output running. A fixed home battery keeps the circuits chosen during installation running. More in Backup power with a home battery.

Do I need to register my home battery?

In the Netherlands, yes. Just like solar panels, you register a home battery with your grid operator via energieleveren.nl. How this works is explained in Is a plug-in home battery allowed?

Is a home battery safe?

The batteries we sell use LiFePO4 cells, the safest common cell chemistry for home use. Read where best to place it in Home battery safety.

How long does a home battery last?

That depends on the number of charge cycles and the warranty per model; both are stated on the product page. What those figures mean is explained in Home battery lifespan: cycles, DoD and warranty.