Balcony Solar & Photovoltaic Tax 2026 (Germany)

A balcony solar system or PV on the roof — and the tax office? Stays almost entirely out of it in 2026. Since 2023, solar for private households has been radically simplified for tax: no surcharge on purchase, no tax on the yield. This guide shows what exactly applies, where the limits are, and what you still mustn’t forget.

In short: For balcony solar and PV systems on residential buildings, 0% VAT applies on purchase (§12(3) UStG) and income-tax exemption of the yields up to 30 kWp (single-family home) under §3 No. 72 EStG. No business, no profit calculation needed. But: registration in the market data register remains mandatory.

0% VAT on purchase

Since 2023 a zero rate applies to the supply and installation of photovoltaic systems operated on or at residential buildings (§12(3) UStG). This covers:

• Modules and inverters
• Storage
• the installation
• also balcony solar (plug-in solar devices)

For you this means: the invoice shows 0% VAT — the gross price equals the net price. A balcony solar system for €500 really costs €500, not €595.

Income tax: yields stay free

Under §3 No. 72 EStG, the income from PV systems is income-tax-free if the system stays within these limits:

• up to 30 kWp on single-family homes and commercial properties
• up to 15 kWp per residential/commercial unit on multi-family buildings
• max 100 kWp per person/co-entrepreneurship

A balcony solar system at 800 watts is far below this. You do not have to declare the yields in your tax return and need no cash-basis profit calculation.

Still mandatory: the market data register

Despite all the tax simplification, you must register every system in the Federal Network Agency’s market data register (Marktstammdatenregister). For balcony solar, registration has been greatly simplified since 2024 — a few details suffice. Registration with the grid operator largely falls away for plug-in solar devices.

Balcony solar: the 2026 key data

• Inverter feed-in power: up to 800 watts (since 2024, previously 600 W)
• Module power: often up to ~2,000 Wp permitted
• Tax: 0% VAT on purchase, yield income-tax-free
• Registration: simplified in the market data register

Worked example

The Vogt family buys a balcony solar system for €549 and saves about €120 in electricity costs a year.

• Purchase price with 0% VAT: €549 (instead of €653 at 19%)
• Electricity saving: ~€120/year → tax-free
• No tax return, no business — just the registration

The system thus paid for itself after about four years — entirely without tax effort.

Common mistakes

1. Forgetting the market data register. The tax exemption doesn’t replace the registration duty.
2. Registering a business “to be safe”. Unnecessary for favoured systems.
3. Declaring yields in the tax return. Not required for exempt systems.
4. Giving away the 0% VAT. Watch for the zero rate on the dealer’s invoice.

For larger roof systems with feed-in, the feed-in tariff calculator and the article on the feed-in tariff are worthwhile. Energy renovation on the house? See Renovation & tax bonus.

How Restio helps

Solar has become simple for tax — but “simple” doesn’t mean “nothing to do”. Restio tells you what really remains:

• What applies to you? — describe your system, and Restio tells you whether it falls under the tax exemption and what you must register.
• Check the 0% — photograph your purchase invoice; Restio checks whether the zero rate was applied correctly.
• Instant answers — ask in English or German: “Do I have to declare my balcony solar in my tax return?” or “Where do I register it?”

For larger systems with feed-in and several owners, a tax advisor helps — Restio clarifies in advance whether that’s even needed.

A tax topic has rarely been so pleasant: solar for private households is relieved for tax in 2026 from purchase to yield. Those who use the zero rate and register the system have done everything right. The legal basis is in §3 No. 72 EStG.