How long does a home battery last?

A home battery lasts about 10 to 15 years, but that figure depends on how often you charge and discharge it. Cycles matter more than years.

Home battery payback time: what does it depend on?

Home battery payback ranges from a few years to over twenty. The difference is your contract, your usage and the price you pay.

What is SCOP, and what does it tell you about a heat pump?

SCOP is a heat pump’s seasonal efficiency. What the number means, what pushes it up or down, and how it sets your electricity use.

How many kWh of home battery do you need?

For most households 5 to 9 kWh is enough, and smaller is often smarter than bigger. How to pick the right size from your usage and your solar.

Dynamic energy contract: how it works and who it suits

On a dynamic contract your electricity price changes every hour. When that pays off, and when a fixed contract is the wiser choice.

How does a home battery earn on the imbalance market?

The imbalance market is the highest-yield earning model, but also the most uncertain. How it works and why you should budget cautiously.

The ISDE heat-pump subsidy in 2026: how it works

How much subsidy you get for a heat pump, which conditions apply, and what changed in 2026. A short, honest overview.

Feed-in costs: what they are and how to keep them low

More suppliers now charge you for exporting solar power. What feed-in costs are, why they exist, and how to limit them.