Coming soon
Your best setup
The free calculator works out what one battery or set of solar panels earns you. Your best setup is a personal report that works out what you should buy: solar panels, battery and energy contract together.
Free calculator or your best setup
The calculator answers: what does this battery or these solar panels earn me? The report answers: what is the best setup for my house, with solar panels, battery and energy contract together? Those are two different questions.
Free calculator
- What your battery or solar panels earn: savings, payback time and verdict
- The plug-in battery that earns you the most
- How much more another battery size or number of solar panels earns, but not which one
- Your result as a PDF
Your best setup, € 10
- How many solar panels and which battery size earn the most, alone or together
- The best installed home battery, by model, with a price including installation
- Fixed, day/night or dynamic tariff, each with the best way to charge
- How it turns out in good, average and bad price years
- A plain-language explanation to take to your installer
Price
€ 10, once. No account and no subscription. If you don't find the report useful, you get your money back.
The report calculates as independently as the calculator: no choice depends on a commission. Our rules
What the report looks like
An example with a made-up household and illustrative figures: the report is still in the making. Your report uses your own consumption.
Your best setup
Household with a heat pump, 5,500 kWh offtake a year, no solar panels yet, fixed contract.
What to buy
6 kWp of solar panels
A 5 kWh battery: Battery A
Dynamic contract, charged smartly
- Investment
- € 10,200
- Savings per year
- € 930
- Paid back after
- 11 years
- Profit over 20 years
- € 6,900
In plain language: solar panels earn the most. A small battery on top still pays off, a large one doesn't. Most of the battery's gain comes from the dynamic contract, so switch to that too.
Setups compared
| Setup | Profit over 20 years |
|---|---|
| 6 kWp + 5 kWh battery | € 6,900 |
| Only 6 kWp of solar panels | € 5,200 |
| 6 kWp + 10 kWh battery | € 5,600 |
| Buy nothing, switch to a dynamic contract | € 2,100 |
| Only a 5 kWh battery | -€ 1,100 |
Installed home batteries, including installation
| Model | Installed price |
|---|---|
| Battery A (5 kWh) | € 3,900 |
| Battery B (6.5 kWh) | € 4,600 |
| Battery C (5 kWh) | € 4,300 |
Energy contracts, each with its best way of charging
| Contract | Savings per year |
|---|---|
| Dynamic, charged smartly | € 930 |
| Day/night, charged at night | € 810 |
| Fixed, charged with own solar power | € 760 |
Good, average and bad price years
| Price year | Savings per year |
|---|---|
| Good year (like 2022) | € 1,120 |
| Average year | € 930 |
| Bad year (small price differences) | € 640 |
Even in a bad price year this setup still makes a profit, but it pays for itself more slowly.
When?
The report is in the making. Join the waitlist and you'll be the first to hear when you can order it. That doesn't commit you to anything.
Built by an energy engineer with 10 years of experience in the energy sector. No commission steers the advice. Our rules