Guide · Households
Is a home battery worthwhile for a detached house?
A home battery is especially worthwhile when using spot electricity, consumption is high, or the home has solar panels. Here is how to identify whether a battery is right for your home.
4 min read · updated 2026-10-28
At a glance
What you need to know
- A spot electricity contract makes the battery's benefits visible every day
- Electric heating, ground source heat pumps and electric vehicles increase shiftable consumption
- Surplus from solar panels is retained for self-consumption
- With a backup power unit, the home stays running during a power cut
Home battery with spot price electricity
The spot price of electricity fluctuates hourly. A home battery charges during cheap hours and automatically discharges electricity into your home during expensive hours – without requiring you to change your daily routine.
Home battery without solar panels
A battery does not require solar panels. The price spread and Grid Rewards flexibility revenue also work without them. If panels are added later, the Emaldo system is ready for solar power.
Who benefits most from a home battery?
Detached homes with electric heating, a heat pump or an EV, and households looking to prepare for power cuts. In a holiday home, a battery provides self-sufficiency and reliability.
Calculate your benefits
How much could a home battery earn you?
The savings calculator estimates your electricity savings and Grid Rewards earnings with your electricity supplier. Request a quote for pricing.
Frequently asked questions
Questions about this guide's topic
What size home battery is needed for a detached house?
A common starting point is a three-battery pack (15.36 kWh), which also qualifies for guaranteed Grid Rewards returns. The calculator suggests the right size based on your consumption.
Does a home battery work during a power cut?
Yes, when a backup power unit is added to the system. The battery will then supply power to your home even during a grid outage.
Do I need to manage the battery manually?
No. The system automatically optimises charging and discharging based on electricity prices and consumption.
Sources and updates
Content reviewed 2026-10-28. Example calculations are indicative: tariffs, reserve market prices and technical suitability are always checked for each site.