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Industry Analysis 8 min read

Dutch Saldering Phase-Out: Installer Guide

Thousands of Dutch homeowners are about to discover that the solar system their installer sized in 2022 is no longer performing the way they expected — not because anything is broken, but because the rules just changed. If you're an installer working in the Netherlands, the saldering phase-out is the single biggest shift in residential solar economics you'll face before 2027, and your clients will be coming to you for answers.

What Is Saldering — And Why Has It Worked So Well?

Saldering is the Dutch term for net metering: the arrangement that lets residential solar owners offset what they consume from the grid with what they export to it, calculated on an annual basis. In practice, this has meant that a kilowatt-hour you export at noon in July can effectively cancel out a kilowatt-hour you import at 7pm in January.

Here's what made this particularly valuable: under saldering, exported solar electricity is valued at the full retail electricity rate — which in the Netherlands includes energy tax (energiebelasting) and network charges on top of the commodity price. That's not the wholesale rate. That's the full stack. For most residential customers, this made every exported kilowatt-hour worth significantly more than the underlying market value of the electricity itself.

The result? Installers could size systems aggressively — maximise the panel count, fill the roof, push generation as high as possible — and the economics held up because every kilowatt-hour produced, whether consumed or exported, was effectively worth the same to the customer.

That logic is now expiring.

The Phase-Out Timeline: What's Actually Announced

The Dutch government has confirmed a phased reduction of the net metering benefit starting in 2025, with a full phase-out planned by 2027. The direction of travel is clear: after the phase-out, exported electricity will be valued at a lower feed-in tariff closer to the wholesale electricity price rather than the retail rate.

Watch out: The exact feed-in tariff rates post-phase-out have not yet been finalised. Be cautious about any supplier or colleague quoting a specific number — treat those figures as estimates until officially confirmed.

What this means structurally is a widening gap between what your customer pays for each kilowatt-hour they import and what they receive for each kilowatt-hour they export. The retail rate includes taxes and network charges that wholesale pricing does not. Once saldering is gone, that premium disappears for exported energy.

For installers, the practical implication is straightforward: a system designed to maximise total generation will no longer automatically maximise total value for the homeowner.

Why System Sizing Logic Has to Change

Under saldering, the sizing calculus was simple. More panels generally meant more value, because every exported unit was credited at retail. The optimal system was often the largest one the roof and the budget could accommodate.

Post-saldering, self-consumption rate becomes the key economic driver. Self-consumption rate is the percentage of your solar generation that is actually consumed on-site rather than exported to the grid. A system generating 5,000 kWh annually where the household consumes 4,500 kWh on-site has a self-consumption rate of 90%. A system generating 8,000 kWh where only 4,500 kWh is used on-site has a rate closer to 56%.

In a saldering world, both systems might have looked equally attractive because all generation was valued the same way. In a post-saldering world, the second system has 3,500 kWh per year earning a much lower feed-in rate — and that changes the payback calculation meaningfully.

Here's a concrete way to think about it. Picture a detached family home in Utrecht with a south-facing roof, modest shading, and annual consumption of around 3,500 kWh. Previously, you'd size a system to cover as much annual consumption as possible and not worry too much about hourly matching. Going forward, you need to think about when the household consumes electricity and how closely the solar generation profile matches that pattern.

Pro tip: When assessing a new residential installation in the Netherlands, make self-consumption modelling part of your standard proposal workflow — not an optional add-on. Clients who understand their self-consumption rate will make better-informed decisions about panel count and battery options.

Battery Storage: From Nice-to-Have to Financially Rational

The change in export valuation is doing something interesting to the battery storage market: it's making the numbers work in a way they previously didn't for many standard residential installations.

Battery storage becomes more economically attractive as the gap between retail and feed-in rates widens. Here's the logic: if you can capture excess midday generation in a battery and discharge it in the evening rather than exporting it and reimporting it later, you're effectively substituting retail-priced imports with stored solar generation. The wider that retail-versus-feed-in gap, the more valuable each stored kilowatt-hour becomes.

This doesn't automatically make a battery the right recommendation for every client — the upfront cost, usage patterns, and battery sizing all matter. But it does mean that conversations which previously ended with "the battery payback doesn't quite work" may now reach a different conclusion when modelled against post-saldering tariff structures.

For installers, this is both a challenge and an opportunity:

What This Means for Clients With Existing Systems

A significant number of Dutch homeowners installed solar under the assumption that saldering would continue indefinitely. Many of them are your past customers. When the phase-out bites, some of them will see higher annual energy costs than they expected — not because their panels are underperforming, but because the policy framework has changed.

This is coming regardless of anything you do. The question is whether you're the one who explains it proactively, or whether they find out from their energy supplier and call you confused.

A few practical points for managing this:

Watch out: Be careful not to promise specific financial outcomes. The post-saldering feed-in tariff rates aren't finalised, and electricity prices generally can move in ways that affect the overall picture. Give clients the framework to understand the economics, not a guarantee of a specific result.

Adjusting Your Design Approach Going Forward

Dutch installers need to adjust their system sizing recommendations to optimise for self-consumption rather than maximum generation. In practice, this means several things for how you approach new installations:

Gather better consumption data upfront. Hourly or half-hourly consumption profiles — increasingly available through smart meter data — let you model self-consumption much more accurately than monthly totals. A household with high daytime consumption (home workers, EV charging during the day, heat pumps) will naturally have a better solar self-consumption profile than a household where everyone is out from 8am to 6pm.

Don't automatically max out the roof. There are cases where a slightly smaller array with a high self-consumption rate outperforms a larger array with significant export in a post-saldering environment. Run both scenarios for the client.

Factor in future load changes. EV chargers, heat pumps, and home batteries are all becoming more common. A system sized for today's consumption profile may look different in three years when the household has added an EV. Building in some headroom — but not unlimited headroom — is worth discussing.

Document your sizing rationale. As the policy environment changes, clients may question past recommendations. Clear documentation of why you sized a system the way you did, based on the information available at the time, protects you professionally.

For a broader view of how Dutch energy market dynamics — including wholesale pricing trends that will influence post-saldering feed-in rates — are evolving, the Quasar Intelligence market analytics reports cover NL zone pricing on both a weekly and monthly basis.

The Bigger Picture: A More Mature Solar Market

The saldering phase-out isn't a sign that the Netherlands is turning against solar. It's arguably a sign that the market is maturing. A policy designed to bootstrap residential solar adoption by offering retail-rate compensation for exports made sense when the industry needed a push. As solar becomes the default choice for new residential construction and grid operators manage increasing volumes of distributed generation, the economics need to reflect actual grid value more closely.

For installers, this maturation is a professional opportunity as much as a challenge. The clients who will do best are the ones working with installers who understand system design beyond "fill the roof and let saldering handle it." Optimising for self-consumption, modelling battery economics honestly, and communicating clearly about policy changes — these are skills that differentiate serious professionals from box-shifters.

If you're also involved in sizing the electrical infrastructure for these installations — cable sizing, load calculations, PV array design — tools that generate IEC-compliant documentation save time and reduce risk. PowerCalc AI engineering reports cover solar PV and battery design for the Netherlands and 11 other EU countries.

The phase-out is happening. The installers who prepare now, adjust their workflows, and have informed conversations with their clients will be the ones still thriving in 2028.

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