Solar panel return on investment in the Netherlands (2026)

In 2026 a typical home solar system in the Netherlands pays for itself in roughly 7 to 11 years, after which it produces electricity for free for the rest of its 25-year lifespan. Your exact payback depends on what you pay for the system, how much electricity you use, and — increasingly — how much of your own solar power you use directly. One important change drives that last point: net metering (saldering) ends on 1 January 2027, which makes self-consumption matter more than ever. This guide shows how to calculate your return and what the 2027 change means for it.

Calculate the Number of Solar Panels Required

There exists a relationship between the efficiency, area, and peak power (Wp) of solar panels. A solar panel with a given surface area and higher efficiency will generate a greater peak power compared to a solar panel with the same surface area but lower efficiency. In simpler terms, solar panels with higher efficiency require less surface area but generate more output. This makes them particularly appealing when space on a smaller roof is to be utilized. By opting for high-efficiency solar panels, you can still generate the desired power output within a restricted area.

Calculation Examples for Return on Investment

Let's consider an example scenario: You have a roof area of 20m², and you aim to generate 3500 kWh of electricity annually, which is the average amount for a family of three.

Option 1: Solar Panels of 2m² with a Peak Power of 300 Wp

• Solar panel efficiency: 19.2%
• Peak power (Watt): (2m² * 300) / (2 * 1000)
• Required number of solar panels: 3500 kWh / 300 Wp = approximately 12 solar panels
• Area required: 12 solar panels * 2m² = 24m² (exceeds the available roof area)

Option 2: Solar Panels of 1.24m² with a Peak Power of 245 Wp

• Solar panel efficiency: 19.2% * (1.24 / 2)
• Peak power (Watt): 19.2% * (1.24 / 2)
• Required number of solar panels: 3500 kWh / 245 Wp = approximately 14 solar panels
• Area required: 14 solar panels * 1.24m² = 17.36m² (suitable for the available roof area)

Payback Time of Solar Panels

The yield has a significant influence on the payback time of solar panels. To estimate the payback period you need the system's yield, expressed in Watt-peak (Wp). Solar panels don't produce the same amount of power all day, though — they only deliver their peak output under ideal conditions.

In the Netherlands, a panel typically delivers the equivalent of about 850–950 full-power hours per year. As a rule of thumb, every 1 Wp installed produces roughly 0.85–0.95 kWh per year. The actual output depends on orientation, tilt, shading, and the weather.

Example Return on Investment for Solar Panels

Suppose you want to cover 4,500 kWh per year (typical for a family of four). Allowing for losses, you'd size the system for about 4,500 / 0.85 ≈ 5,300 Wp of capacity.

• Roof area: with 20–30 m² of roof you'd need roughly 14–21 panels to cover this household.
• System cost: a system this size costs in the region of €5,000–€7,000 in 2026 (0% VAT, installation included). Prices have fallen sharply over the past few years.
• Annual benefit while net metering applies (through 2026): at an electricity price of around €0.25–€0.30/kWh, offsetting 4,500 kWh is worth roughly €1,100–€1,350 a year.

On those numbers the payback period in 2026 lands at roughly 5–7 years while net metering is still in force. From 2027 onward, only the share you use directly keeps that full value; surplus you export earns a feed-in payment of (by law) at least 50% of your supplier's basic rate. For a household that exports a lot of its production, that stretches the realistic payback toward 9–11 years — still comfortably inside the panels' 25-year lifespan.

How the end of net metering affects your payback

Net metering (saldering) ends on 1 January 2027 under the Wet beëindiging salderingsregeling. Here's the short version of what it means for your ROI:

• Through 2026: every kWh you feed back is offset 1-for-1 against a kWh you use — surplus is worth the full electricity price.
• From 2027: surplus you export earns a feed-in payment (terugleververgoeding) instead. Until 2030 this must be at least 50% of your supplier's basic delivery rate, and suppliers may not charge negative feed-in costs.

This is why payback estimates have lengthened compared with older guides: a 2023 article might have quoted 9–13 years on much higher prices, but today's lower system cost shortens it again — while the 2027 change pushes it back for households that export a large share. The two effects roughly balance out to the 7–11 year range above. For the full subsidy picture, see our solar panel subsidies guide.

Examples of Return on Investment

Factors that affect the ROI of solar panels

Several factors influence your return on investment. Some you control, others come down to your home and the weather:

1. Type and efficiency of the panels — higher-efficiency panels generate more from the same roof area.
2. Orientation and tilt — a south-facing roof at around 35° yields the most; east-west splits the peak across the day.
3. Shading — chimneys, trees, or neighbouring buildings reduce output.
4. Self-consumption — using power as you generate it becomes the key driver of return once net metering ends in 2027.
5. Electricity price — the higher the rate you'd otherwise pay, the more each generated kWh is worth.
6. System cost and installer — comparing quotes keeps your upfront investment down and shortens payback.

Related articles

• Subsidies for solar panels
• Solar panels
• Cost of a heat pump