Should you add solar, a battery, or a heat pump?
See the combined return for your Dutch home under the post-2027 net-metering rules. Free, private, runs entirely in your browser.
Combined ROI calculator
Solar, battery, and heat pump modelled together, because their value depends on each other.
Upgrade check
See whether switching to dynamic, a smart heat pump, and a battery pays off for you.
Post-2027 ready
See exactly how the end of net metering changes the numbers for a home battery.
Latest guides
3 Jul 2026 · 4 min read
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.
11 Jun 2026 · 4 min read
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.
9 Jun 2026 · 4 min read
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.