Sweden's Green Technology Deduction 2026: Solar, EV, Battery

The green technology deduction (grön teknik) is one of the strongest selling points an electrician, solar installer or EV-charger fitter has in a quote. The customer sees a lower price right on the invoice, and your company settles the difference with the Swedish Tax Agency. But the rules change almost every year, and 2026 is no exception. This guide walks through what actually applies right now, with concrete figures and practical steps for owners — and where you need to be careful.

Note: tax rules and percentages change. Always confirm the current rules with Skatteverket before giving a customer a binding figure.

What is the green technology deduction?

Grön teknik is a tax reduction that works much like Sweden's ROT and RUT deductions: the customer gets the reduction directly on the invoice, and the installation company then claims the difference back from Skatteverket. The private individual doesn't apply for anything themselves — it runs through you.

The deduction covers three installation types: grid-connected solar systems, systems for storing self-produced electricity (batteries), and charging points for electric vehicles (EV chargers/charging stations). Unlike ROT, grön teknik applies to owned homes and certain other property forms, but you should always double-check eligibility per customer.

Rates and the cap in 2026

For 2026, the following rates apply to combined labour and material cost (always verify with Skatteverket before each project):

• Solar cells (grid-connected system): 15% of labour and material cost.
• Storage of self-produced electricity (battery): 50%.
• EV charging point (charger): 50%.

The key change to know: the solar subsidy rate was cut from 20% to 15%, and it's the final payment date that decides which rate applies. For installations where the customer makes final payment after 30 June 2025, the 15% rate applies. Put that figure in the quote correctly, or you'll have a happy customer who's disappointed by the final invoice.

The cap is a maximum of SEK 50,000 per person per year, totalled across all three categories. That means a married couple who jointly own the property can claim up to SEK 100,000 together on a single installation — a point worth raising in quotes for larger solar jobs. How ownership is structured determines how the deduction can be split, so always ask about ownership before you invoice.

The big trap: the inverter and batteries without solar

This is where many go wrong. Skatteverket has been clear that the inverter counts as part of the solar installation — so 15%, not 50% — even when it's marketed as a hybrid inverter capable of battery operation. Don't try to recategorise the inverter as a battery component to reach the higher rate; that's exactly what the agency has audited.

The second trap is standalone batteries. A battery only qualifies for the higher rate if it's connected to an installation for self-produced electricity — in practice, solar. The battery may be invoiced separately from the solar panels, but the solar must be installed at the same time or earlier. A battery installed with no solar at all — even if the customer plans solar later — does not qualify. Be honest with the customer about this from the start.

What's included — and what isn't

The deduction covers labour and materials together, and requires a professional installation — materials the customer buys themselves don't qualify. There's no fixed apportionment formula between labour and materials in the legislation; the combined installation cost is the basis.

However, some things typically do not qualify, and you should invoice them clearly separately:

• Grid connection fees to the network owner.
• Freight, transport and travel costs.
• Design work and consulting.
• Restoration work and electrical panel upgrades that aren't part of the green technology installation itself.

Because the line can be fine, it pays to keep the invoice clean: one line for what falls under green technology, separate lines for what doesn't. That spares you arguments later if Skatteverket declines reimbursement on a portion.

How to handle the flow in practice

Administratively, the flow looks like this: you issue a quote with the green technology deduction clearly netted out, the customer pays the reduced amount, and you claim the difference from Skatteverket. Frame it right and the deduction becomes a concrete price argument rather than an after-the-fact surprise.

This is where a well-built quoting and invoicing tool makes a difference. In FieldApp, you can build quotes that are aware of both ROT and green technology, so the deduction is netted out automatically on the right line items and the customer sees their real price immediately. When the job is done, that information carries all the way through to the invoice, which in turn syncs to Fortnox for the books. No calculating percentages by hand on every line.

A few practical habits that save you headaches:

• Always note the final payment date — it determines which solar rate applies.
• Ask about property ownership before splitting the deduction across people.
• Keep the inverter on the solar rate and battery lines tied to a solar installation.
• Keep documentation proving the installation was professionally performed.

Summary

The green technology deduction in 2026 means 15% on solar and 50% on batteries and EV chargers, with a cap of SEK 50,000 per person per year. The most common mistakes are the wrong solar rate after mid-2025, miscategorising the inverter, and batteries without a connected solar installation. Get the figures right in the quote, be honest about the edge cases, and let the system do the maths.

Want the deductions calculated correctly and automatically — from quote to signature to Fortnox-synced invoice? Try FieldApp free for 14 days and see how much admin you can drop. And for exact, current rules, always verify with Skatteverket.