energie27for households

What happens to your electricity bill in 2027, and what if you change something?

84 days until net metering ends
Calculator
Quick calculations

Calculate one part

Electricity useHow much electricity you useSolar panelsGeneration and yield without net meteringHome batteryYield and payback timeHeat pumpFrom gas to electricityAir conditioningElectricity for cooling and heatingElectric drivingCharging costs, charge point and EREDynamic contractsFixed or dynamic: which contract is cheapestEverything togetherThe full calculator

What effect does each combination have on my electricity bill?

Solar panels, home battery, charging point, heat pump, a different contract, smarter habits and much more. See straight away what they save per year, together or separately.

Solar panels, battery, charging point, heat pump, contract, habits and more. See what they save per year, together or separately.

Free and independent: no ads, no selling of data. Why?

Start with your situation

Then combine and compare

Everyone in the Netherlands deserves honest, number-based insight into their energy bill for 2027. Nothing more, nothing less.

  • Hour by hourReal hourly prices and the weather of the past year.
  • Tuned to you25 parameters, calibrated on your annual statement.
  • Combined effectOptions affect each other; they are calculated together.
  • Without net meteringWhat it will cost you in 2027.
  • Your postcodeSun and grid operator for your postcode.
  • Nothing for saleNo partners, no account, no ads.
  • 31contracts: 20 dynamic (rates updated every week) and 11 fixed (model contract), compared hour by hour
  • 32KNMI weather stations for the weather in your year
  • almost 20years of satellite measurements of the sun (PVGIS)
  • 35.040TenneT quarter-hour prices for imbalance trading

Using the rates of dynamic energy suppliers and grid operators, and data from PVGIS (European Commission), KNMI, EnergyZero and TenneT. Your input is only stored in your own browser.

How it works

  1. CheckWe calculate your home hour by hour with a model of 25 parameters. With your annual statement you adjust it until it matches. That is the starting point for simulating various scenarios.
  2. CombineWhat will your situation cost in 2027, without net metering? Combine solar panels, a home battery, a charging point, a heat pump, a different contract or different habits.
  3. CompareSee what it saves together per year, and in how many years you earn back the purchase.

Options affect each other

  • Home batteryDynamic contract ReinforceCharges in the cheap hours
  • Home batteryCharging the car on solar Can weakenShare the same solar power
  • Solar panelsHeat pump or air conditioning ReinforceMore of your own power used at home
  • Solar panelsDynamic contract Can weakenFeeding in on sunny afternoons is worth little

Save without investments

Without net metering, solar power you use yourself is worth the most. Then it is not only what you have that counts, but also when you use electricity. The calculator works out what a different habit saves you, and you can put them side by side.

Fill inYour situation in the past year

Nothing is required: whatever you leave empty, the calculator fills with an average. The more you fill in yourself, the more reliable.

Let your own AI fill it in

Give your AI (ChatGPT, Claude, Gemini) your annual statement with our question, and paste the answer here. Only this browser reads it.

What did you have in the past year?

Tick what you had then and fill it in next. The calculator works out your feed-in from your solar panels.

Getting something new before 2027, such as a car, solar panels or another contract? You enter that in step 2.

Solar panels
Annual generation

Preferably last year. If your figure is from another year, choose that year: the calculator converts the total to last year (the weather and the ageing of the panels).

Determines when the power comes (east in the morning, west in the afternoon), also if you enter the annual generation yourself. This affects how much you use yourself and the hourly prices.

Flat roof with panels lying flat: 0; flat roof with mounting frames: 10–15; pitched roof: usually 30–45; façade: 90.

Panels produce a little less every year than when they were new. At 0.5% per year, a panel that is 10 years old produces 5% less. Modern panels (n-type, glass-glass) usually 0.3–0.4% per year, older ones 0.5–0.8%; it is stated in the panel's power warranty.

Switch off panels at negative prices

At a negative feed-in price you pay for what you feed in. 'Yes, always': your own inverter switches the panels off at every negative price, with any contract. 'No': you feed in then too and pay for it, except with a dynamic contract whose supplier switches your panels off remotely ('Curtails' in the table of all contracts).

Annual generation last year: –

Electric driving

The calculator then adds 10% charging losses.

Without a charging point you charge from a normal socket, about 2.3 kW.

Optional, incl. VAT and installation. Without a price, the payback time uses a market price range.

Did you already charge at home last year? Then that is in the electricity use you entered: leave the box ticked, and the calculator subtracts it so it is not counted twice. If the car is still to come, untick the box.

Regardless of whether anyone is home: if you take the train to work, the car is at home.

In the cheapest hours: the charger or car charges at the lowest hourly price (dynamic contract). If the car is away during the day, in the evening or at night. Controlled by the supplier: spread over the cheapest hours, at a lower power.

Does your supplier pay you for being allowed to control the charging? Enter the amount per year, incl. VAT. Only counts with a dynamic contract.

On solar surplus a charger only starts from about 1.4 kW of surplus; with less sun it does not charge and the car tops up in the evening. Many 11 kW chargers switch to 1 phase for this. If yours does not, tick 'only on 3 phases': then only from 4.1 kW.

Without the net metering scheme, solar power fed back earns little. Many people therefore charge more often on solar surplus and less in the evening. Calculate both options.

Charging costs per year, public charging or comparing with a petrol car? Quick calculation: electric driving.

Home charging per year: –

Home battery

If you choose a model, the calculator fills in capacity, power, usable share and (if the manufacturer states them) losses and standby, from the data of energieprijzen-nl. You can adjust them afterwards.

Smart: also charges from the grid when electricity is cheap and feeds back when it is expensive (on day-ahead prices). Smart control and imbalance trading are only possible with a dynamic contract; with a fixed contract the calculator uses the battery for self-consumption only.

Connected to

Hybrid inverter: the battery is connected to the inverter of the solar panels. Solar power then goes into the battery without being converted to alternating current and back; that saves about 6% of what the battery charges from solar, usually € 5–15 per year. Charging from the grid and discharging are equally efficient. Usually also somewhat less standby use: one inverter instead of two. A plug-in battery is always AC.

Losses: the share of electricity lost when it goes into the battery and out again (inverter and battery together). Manufacturers often state 5–10%; in practice it is usually 10–15%.

Standby: what the battery and inverter always consume, even when idle. Usually 20–50 W. This counts as household consumption.

Many batteries do not charge completely empty or full, to protect them; usually 90% is usable. If the manufacturer states the usable capacity and you entered that above, set this to 100%.

Optional. With the price from your quote, the payback time uses your price instead of a market range (incl. installation, before VAT refund and subsidy). With the lifetime or warranty you can see whether it pays for itself within that time.

Home battery: –

Heat pump
Calculate from your gas consumption

Don't have your gas consumption at hand? Estimate it from your home.

Type of heat pump
Heat emitters

Gas from your annual statement (heating, hot water and cooking). Hybrid: usually 60–80% of the heating; hot water stays with the boiler. SCOP: with radiators usually 3–3.5, with underfloor heating 4–4.5 (lower flow temperature); ground source higher. It is in the specifications.

Did you already have the heat pump last year? Then it is in the electricity use you entered: leave the box ticked, and the calculator subtracts it so it is not counted twice. If the heat pump is still to come, untick the box. Using 'Fill in' from your gas use unticks the box: you do not have that heat pump yet.

Which heat pump suits your home, and how much gas does it save? Quick calculation: heat pump.

Heat pump per year: –

Air conditioning
Estimate from your home

Did you already have the air conditioner last year? Then it is in the electricity use you entered: leave the box ticked, and the calculator subtracts it so it is not counted twice. If the air conditioner is still to come, untick the box.

Work out consumption from power and hours, or heat with the air conditioner? Quick calculation: air conditioner.

Air conditioner per year: –

Contract
Fixed contract

Many fixed contracts charge households with solar panels feed-in charges, usually € 0.05–0.15 per kWh (€ 0.08 is an average). The exact amount is in the terms of your contract.

Some suppliers charge a fixed amount per month, depending on how much you feed back per year (tiers). Enter the tiers from your terms; the charge per kWh then does not count.

Amounts in euros, including VAT and energy tax. Enter the rates of your own offer.

Fixed contract: –

No contract of your own: the calculator uses a fixed contract at the average rate (Statistics Netherlands, CBS). In step 3 you can see what a dynamic contract saves.

Your habits

Without net metering, when you use electricity matters too. Why?

What you see after Calculate

  • Your electricity bill in 2027Per year and per month, with and without net metering.
  • Savings versus costsWhat a home battery saves per year, what it costs and in how many years it pays for itself, for every size.
  • The cheapest contractYour contract next to all dynamic contracts.
  • Hour by hourSunshine, consumption and market price on an average day, per month.

Frequently asked questions

What changes in 2027?

On 1 January 2027 the net metering scheme (salderingsregeling) ends. You can then no longer offset the electricity you feed back against electricity from the grid. You only get your supplier's feed-in compensation, and with many fixed contracts you pay feed-in charges. Solar power that you use yourself therefore becomes more valuable.

Will a home battery save me money?

That depends on how much solar power you have left over during the day, how much you use in the evening and at night, and on your contract. The calculator works out what a battery saves per year and in how many years it pays for itself, for every size.

Fixed or dynamic contract?

With a dynamic contract you pay the market price per hour, and you also get it for feed-in. With a battery or a car that charges during cheap hours, this can be advantageous. The calculator compares your contract with all dynamic contracts.

How accurate is the result?

It is an estimate, not a quote. The calculator works through every hour of a year with real market prices, but with a standard consumption pattern. You can check the result against your own annual statement. The difference between two situations is more reliable than the amount itself.More about accuracy

What happens to my data?

Your input is only stored in this browser. The calculator uses your postcode to look up your location and grid operator. Nothing is sent to us unless you send a report yourself via ‘Is this wrong?’.

More questions, and how the calculator works

About energie27

Free and independent. Always.

Energie27 is made by Zhi Zheng, with two aims: helping households make a good choice now that net metering ends, and showing what can be built with AI-assisted development.

Truly independent calculations. We don’t sell batteries, solar panels or contracts, we don’t refer you to anyone and we don’t favour any brand. We calculate with real hourly prices and market data. If your payback time comes out at 15 years, we simply tell you so. Honesty is the best policy. For the same reason, the dashboard is switched off for commercial use: only community organisations, such as a local energy advice desk, can get a licence. What to look for in a comparison site?

Free for everyone: no account, no ads, no tracking and no selling of data. Nobody pays for a place in the comparison and the site names no partners.

The data is open: rates, grid costs and battery prices come from energieprijzen-nl on GitHub; possibly the code later too. Want to help? Email us your bill with itemisation (step 1 or 5); that is how we test the model.

Question or commentWhat we did with reports

  1. CheckDoes it match your latest annual statement?

    Your electricity bill in 2027  

      Is this roughly right?

      Next: your situation in 2027

    • Look aheadYour situation in 2027

      First confirm your situation in 2025; then you will see here what changes in 2027.

    • ChooseWhat can you do?

      First confirm your situation in step 1; then you will see here what you can do and how much it saves per year.

    For the sunshine at your location and your grid operator (the grid charges). Without a postcode: the centre of the country and Enexis.

    Grid connection

    The grid operator follows from your postcode; choose another one yourself if it is wrong. The connection is shown on your annual statement or on the main switch in the meter cupboard; almost all homes have up to 3x25A.

    Rate of Enexis for this connection, incl. VAT. The same for every contract.

    Current situation

    The calculator only covers electricity, not gas. Anything you did not fill in yourself is set to a typical value; change whatever is wrong. The results are below the form.

    Your current situation

    The year of the bill; default 2027, the first year without net metering. A later year: older panels, the same prices. 2025: the last full year, with net metering, to compare with your annual statement.

    Someone who uses electricity: working from home, retired, young children. Weekends always count as at home. Whether the car is at home during the day, you enter separately under Electric driving.

    How often you run the washing machine, dishwasher and tumble dryer (together approx. 530 kWh per year) when it is favourable: on solar surplus, and with a dynamic contract otherwise in the cheapest hours.

    With a heat pump, hot tap water shifts along too (a quarter of its consumption). The calculator knows the hourly prices in advance; doing it by hand usually achieves a little less. You set the car under Electric driving.

    Solar panels
    Annual generation

    Preferably last year. If your figure is from another year, choose that year: the calculator converts the total to last year (the weather and the ageing of the panels).

    Determines when the power comes (east in the morning, west in the afternoon), also if you enter the annual generation yourself. This affects how much you use yourself and the hourly prices.

    Flat roof with panels lying flat: 0; flat roof with mounting frames: 10–15; pitched roof: usually 30–45; façade: 90.

    Panels produce a little less every year than when they were new. At 0.5% per year, a panel that is 10 years old produces 5% less. Modern panels (n-type, glass-glass) usually 0.3–0.4% per year, older ones 0.5–0.8%; it is stated in the panel's power warranty.

    Switch off panels at negative prices

    At a negative feed-in price you pay for what you feed in. 'Yes, always': your own inverter switches the panels off at every negative price, with any contract. 'No': you feed in then too and pay for it, except with a dynamic contract whose supplier switches your panels off remotely ('Curtails' in the table of all contracts).

    Annual generation last year: –

    Electric driving

    The calculator then adds 10% charging losses.

    Without a charging point you charge from a normal socket, about 2.3 kW.

    Optional, incl. VAT and installation. Without a price, the payback time uses a market price range.

    Did you already charge at home last year? Then that is in the electricity use you entered: leave the box ticked, and the calculator subtracts it so it is not counted twice. If the car is still to come, untick the box.

    Regardless of whether anyone is home: if you take the train to work, the car is at home.

    In the cheapest hours: the charger or car charges at the lowest hourly price (dynamic contract). If the car is away during the day, in the evening or at night. Controlled by the supplier: spread over the cheapest hours, at a lower power.

    Does your supplier pay you for being allowed to control the charging? Enter the amount per year, incl. VAT. Only counts with a dynamic contract.

    On solar surplus a charger only starts from about 1.4 kW of surplus; with less sun it does not charge and the car tops up in the evening. Many 11 kW chargers switch to 1 phase for this. If yours does not, tick 'only on 3 phases': then only from 4.1 kW.

    Without the net metering scheme, solar power fed back earns little. Many people therefore charge more often on solar surplus and less in the evening. Calculate both options.

    Charging costs per year, public charging or comparing with a petrol car? Quick calculation: electric driving.

    Home charging per year: –

    Home battery

    If you choose a model, the calculator fills in capacity, power, usable share and (if the manufacturer states them) losses and standby, from the data of energieprijzen-nl. You can adjust them afterwards.

    Smart: also charges from the grid when electricity is cheap and feeds back when it is expensive (on day-ahead prices). Smart control and imbalance trading are only possible with a dynamic contract; with a fixed contract the calculator uses the battery for self-consumption only.

    Connected to

    Hybrid inverter: the battery is connected to the inverter of the solar panels. Solar power then goes into the battery without being converted to alternating current and back; that saves about 6% of what the battery charges from solar, usually € 5–15 per year. Charging from the grid and discharging are equally efficient. Usually also somewhat less standby use: one inverter instead of two. A plug-in battery is always AC.

    Losses: the share of electricity lost when it goes into the battery and out again (inverter and battery together). Manufacturers often state 5–10%; in practice it is usually 10–15%.

    Standby: what the battery and inverter always consume, even when idle. Usually 20–50 W. This counts as household consumption.

    Many batteries do not charge completely empty or full, to protect them; usually 90% is usable. If the manufacturer states the usable capacity and you entered that above, set this to 100%.

    Optional. With the price from your quote, the payback time uses your price instead of a market range (incl. installation, before VAT refund and subsidy). With the lifetime or warranty you can see whether it pays for itself within that time.

    Home battery: –

    Heat pump
    Calculate from your gas consumption

    Don't have your gas consumption at hand? Estimate it from your home.

    Type of heat pump
    Heat emitters

    Gas from your annual statement (heating, hot water and cooking). Hybrid: usually 60–80% of the heating; hot water stays with the boiler. SCOP: with radiators usually 3–3.5, with underfloor heating 4–4.5 (lower flow temperature); ground source higher. It is in the specifications.

    Did you already have the heat pump last year? Then it is in the electricity use you entered: leave the box ticked, and the calculator subtracts it so it is not counted twice. If the heat pump is still to come, untick the box. Using 'Fill in' from your gas use unticks the box: you do not have that heat pump yet.

    Which heat pump suits your home, and how much gas does it save? Quick calculation: heat pump.

    Heat pump per year: –

    Air conditioning
    Estimate from your home

    Did you already have the air conditioner last year? Then it is in the electricity use you entered: leave the box ticked, and the calculator subtracts it so it is not counted twice. If the air conditioner is still to come, untick the box.

    Work out consumption from power and hours, or heat with the air conditioner? Quick calculation: air conditioner.

    Air conditioner per year: –

    Contract
    Optional. Counted once if you switch to a different contract.
    Fixed contract

    Many fixed contracts charge households with solar panels feed-in charges, usually € 0.05–0.15 per kWh (€ 0.08 is an average). The exact amount is in the terms of your contract.

    Some suppliers charge a fixed amount per month, depending on how much you feed back per year (tiers). Enter the tiers from your terms; the charge per kWh then does not count.

    Amounts in euros, including VAT and energy tax. Enter the rates of your own offer.

    Fixed contract: –

    In 2027 Price overview Estimate

    Fetching market prices…

    What happens to your solar power?

    Self-consumed
    –
    Fed back
    –
    • Used directly
    • Via the battery
    • Battery losses
    • Fed back
    Generation per year
    –
    Consumption per year
    –
    From the grid
    –
    Self-sufficiency
    –

    With the battery for self-consumption only, as with a fixed contract.

    Per month

    Generation in kWh, by destination. In summer most of it goes to the grid.

    An average day

    Average per hour. Where generation and consumption overlap, you use solar power directly.

    • Generation
    • Used directly
    • Consumption
    • Battery (charging + / discharging −)

    Find it useful? Spread the word.

    The more people do the sums, the fewer surprises when net metering ends.

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    What is sent along?

    Not what you entered.