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Country

The Curtailer works in 29 countries. Each country's site shows that country's own day-ahead prices and weather.

Not listed below? Basic still works with day-ahead prices from any of them. See the full list

Other EU+ countries curtailer.eu Belgium curtailer.be Germany curtailer.de Netherlands curtailer.nl

Language

Free simulation tool

How much could curtailment be worth on your site?

The Curtailer pauses solar export the moment the day-ahead price drops below a threshold you choose - so you stop paying to feed the grid. Pick a price limit to see how often that would have triggered on recent prices, and describe your plant for an estimated euro figure. No account needed.

Examples:
Agro-horti · 380 kWp C&I rooftop · 210 kWp Standalone · 1.2 MWp

Price limit

A Curtailer pauses export when the price drops below this limit - it isn't worth feeding power to the grid below it. Defaults to €0.015 (1.5 cents), the price ANWB Energie pays for feed-in* - excluding VAT.

* Example value: the feed-in price a Dutch supplier (ANWB Energie) pays, excluding VAT - your own contract's feed-in tariff may differ.

Monthly totals

kWh view: exported generation stacked with curtailed generation (the sum is gross production). EUR view: net revenue without vs. with curtailing, side by side.

Estimated net profit with The Curtailer

€4.97k / year

At €795, The Curtailer pays for itself in 2 months.

Curtailment is included free with every Curtailer. Pro and Pro Plus add monitoring and reporting and are priced separately.

~640 full load hours are produced after curtailment.

Most subsidy schemes pay out up to 900–1,000 kWh/kWp. You're 260 hours below a 900-hour cap - you have room to curtail harder, or to lower your price limit and keep more subsidised production.

Based on:

Country
Netherlands
Simulation window
Rolling year
System size
700 kWp
Orientation
East/West (split roof)
Price limit
€0.0150/kWh
Learn more: Disclaimer
Download: Expert report (PDF) 15-minute data (CSV)

Simulation window

Rolling year simulates the last 365 days (excluding today, often incomplete). Picking a specific year simulates that full calendar year instead.

System size

Your solar system's nameplate (peak) capacity.

Orientation

Basic mode assumes one dominant orientation at a typical roof tilt. Switch to advanced mode to describe individual strings with their own azimuth and tilt.

Detailed results

Yearly

Period Gross production Net production Curtailed
Rolling year 638.67 MWh 447.96 MWh 190.72 MWh (30%)

Results per month

Month Days Net revenue without Curtailer Net revenue with Curtailer Curtailed of produced
October 2025 26 €1.22k €1.25k 2.06 MWh of 20.47 MWh
November 2025 30 €1.24k €1.24k 16.5 kWh of 15.68 MWh
December 2025 31 €805.46 €805.47 1.2 kWh of 11.02 MWh
January 2026 31 €1.37k €1.37k 3.5 kWh of 14.15 MWh
February 2026 28 €1.47k €1.48k 996.3 kWh of 21.45 MWh
March 2026 31 €2.51k €2.70k 15.39 MWh of 55.69 MWh
April 2026 30 €1.43k €3.38k 41.49 MWh of 84.48 MWh
May 2026 31 €2.65k €4.02k 37.94 MWh of 87.52 MWh
June 2026 30 €5.01k €5.39k 21.07 MWh of 85.38 MWh
July 2026 31 €4.72k €5.24k 35.82 MWh of 95.89 MWh
August 2026 31 €5.67k €6.06k 26.36 MWh of 84.36 MWh
September 2026 30 €5.13k €5.27k 9.58 MWh of 53.90 MWh
October 2026 5 €1.06k €1.06k 0.0 kWh of 8.68 MWh
Total 365 €34.29k €39.26k 190.72 MWh of 638.67 MWh

About this simulation

Assumptions

Weather station used
De Bilt
Estimated system size
700.00 kWp
Simulation window
rolling year, 365 days with data

All simulations use weather data from De Bilt - the public simulation tool doesn't yet support other locations, so results may differ from your actual site.

Based on real KNMI 10-minute weather (irradiance and temperature) for the station above, and a pvlib/PVWatts solar-position model - not a precision instrument: it uses a simplified (isotropic) sky-diffuse model, a flat system-loss allowance, and no per-module datasheet. Savings and net revenue are both netted against your price limit - as if it were the reference rate you're paid per kWh - so a negative price contributes more than a price just below the limit.

Actual solar generation, curtailment behavior, and revenue depend on your specific installation, module and inverter characteristics, shading, local grid conditions, your energy contract's terms, and future market prices - all of which may differ significantly from the assumptions used here. No rights, guarantees, or contractual commitments can be derived from any figure shown by this tool.

Read the full disclaimer

Get your report

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Daily curtailment statistics

Interesting days:

On this single day you would have profited €0.00 by curtailing 0.0 kWh of the gross 0.0 kWh production.

Amber shading marks curtailed production - intervals where the price was below your limit.

Ready to put these savings to work?

Order The Curtailer for your own site - DIY, by an installer, or full service.

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