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Does making your home sustainable pay off?
For each measure you see what it costs, what it saves and when it pays for itself. We use Dutch tariffs and rules, with a source for every figure, and sell nothing ourselves.
- An honest answer, even when it is "no"
- Runs in your own browser
- All assumptions and sources open
Generating and storing electricity
- Available now
Home battery
Does a battery pay for itself now that net metering ends? With an hourly simulation of your own consumption and contract.
Average household with solar panels: a 5 kWh battery saves about €242 a year.
Calculate it → - Available now
Solar panels
What do panels earn without net metering and with feed-in costs, and does east-west or south matter?
Calculate it → - In development
Energy contract
Fixed, variable or dynamic: which contract suits your consumption?
- In development
PVT panels
Panels that produce electricity and heat, often combined with a heat pump.
- In development
Small wind turbine
When a wind turbine on your own land does and does not make sense.
Heating and hot water
- In development
Heat pump
Hybrid, all-electric or ground source: what you save on gas, what it costs in electricity, and whether your home is ready.
- In development
Solar and heat pump water heaters
Hot water from the sun or a small heat pump instead of gas.
- In development
Shower heat recovery
Recovering heat from shower water.
- In development
Induction cooking and cutting the gas connection
What it is worth to get off gas completely.
- In development
District heating
How a district heating connection works and what you pay.
- In development
Infrared panels
When electric infrared heating is an alternative.
Insulation and ventilation
- In development
Insulation: roof, cavity wall, floor and glazing
How much gas you save per part, and what the subsidy is when you combine several measures.
- In development
Ventilation with heat recovery
Healthy ventilation in a well-insulated home without losing heat.
Electric driving
- In development
Electric car and home charging
Total cost of electric versus petrol, and what smart charging with a home charger saves.
Small steps
- In development
Small measures
LED lighting, smart thermostat, radiator foil, draught proofing, balancing the heating and efficient appliances side by side.
Community, green and financing
- In development
Green roof, rain barrel and less paving
Preparing your home and garden for heat and heavy rain.
- In development
Energy cooperative
Taking part in a local solar or wind project when your own roof is not suitable.
- In development
Subsidies and financing
National and municipal subsidies, loans and extra mortgage room for making your home sustainable.
How our calculators work
Every calculation runs on its own tested engine. The texts on the site use the same results, so text and calculator cannot drift apart.
Every tariff, price and subsidy has a source. When in doubt we leave a figure out rather than guess.