Do I have to tell my insurer about my balcony solar plant?
In short
Yes, tell your contents insurer (Hausratversicherung) and your personal liability insurer (Privathaftpflicht) about your balcony solar plant, and your buildings insurer if the panels are fixed to a house you own. A short email is enough and in many policies costs EUR 0. If you do not, the insurer may question or reduce a claim when your policy does not mention the device.
Guide figures for the device and the notice, October 2026.
Example
Typical range
Notice to contents and liability insurer
EUR 0 extra in many policies
Balcony solar plant 800 watts without battery
from about EUR 200
Complete set with battery
about EUR 800 to 1,500
Grid register entry
EUR 0, within 1 month of switching on
Surcharge for theft outdoors in some contents policies
about EUR 10 to 30 a year
Device prices and deadlines from the sources listed, October 2026.
The surcharge for theft outdoors is a guide figure from quoting practice.
Your policy terms decide what is covered; we are happy to check them for you.
Worked example
Tenant adds a battery and tells no one
A tenant reported a EUR 450 balcony solar plant in 2025. In 2026 he adds a EUR 900 battery without telling the insurer. The battery catches fire and smoke damages the flat.
Damage to furniture, clothes, electronics
about EUR 12,000
Battery itself
EUR 900
Omission slightly careless
insurer pays
Omission grossly negligent
reduction possible
With a notice and confirmation this argument never starts. The amounts are guide figures from quoting practice.
Which insurer needs to know
Three policies can be affected by a balcony solar plant (Balkonkraftwerk), but not in the same way. What matters is who owns the device, how it is mounted and who should pay if something goes wrong.
As a tenant you tell your own contents and liability insurers. Your landlord's buildings insurance does not cover your device, so you do not contact that insurer yourself. You do need the landlord's consent to mount it, and the landlord decides whether to inform their own insurer.
Policy
Tell them?
Why
Contents insurance (Hausratversicherung)
yes
the device is part of your household goods, its value and outdoor position matter
Personal liability (Privathaftpflicht)
yes
older policies sometimes exclude power generating equipment
Buildings insurance, own house
yes, if fixed to the facade or roof
the plant then counts as part of the building
Landlord's buildings insurance
no, not by you
it does not cover your device
Condominium building insurance
through the property manager
if the plant hangs on common property
The legal background in plain words
Under section 23 of the German Insurance Contract Act (VVG) you must not increase the insured risk without the insurer's consent, and you must report an increase without delay. Whether a balcony solar plant legally counts as such an increase is not settled. Panels outside, cables and possibly a battery point towards reporting it.
Forgetting to report does not automatically cost you your cover. Under section 26 VVG the insurer still pays if you were only slightly careless, may reduce payment if you were grossly negligent, and pays nothing only if you acted on purpose. If the solar plant had nothing to do with the damage, for example a burglary through the front door, the insurer must pay anyway.
Since the end of 2023 the model terms for contents insurance in Germany list balcony solar plants. These model terms are not binding and many contracts are older. Reporting the device gets you a written answer on whether and up to what amount it is covered.
What to write
Include your policy number, the make, the output of panels and inverter (Wechselrichter), purchase price and date, where it is mounted, such as balcony rail, facade, garage roof or garden, and whether there is a battery.
Ask for written confirmation that storm, hail, fire, lightning and power surge are covered, and ask about theft outdoors. Ask your liability insurer to confirm that damage from operating the device and feeding power into the grid is included.
When you need to report again
Adding a battery, a third panel or moving the plant from the balcony to the garage roof changes value or risk, so send a new notice. A battery for a balcony solar plant often costs more than the device itself, and insurers look closely at batteries.
Report it again when you move house or switch contents insurer. The old insurer's confirmation does not carry over to a new contract.
The grid register is not an insurance notice
Registering in the Marktstammdatenregister run by the Federal Network Agency (Bundesnetzagentur) is mandatory within one month of switching on, otherwise fines are possible. Since May 2024 devices up to 800 watts inverter output no longer need a separate notice to the grid operator.
None of this reaches your insurer. The register only records that the plant exists. Batteries for plug in solar devices still need to be registered with the grid operator by a qualified electrician.
When a notice adds little
If you took out your contents insurance after late 2023 and it names balcony solar plants with a sufficient limit, the notice is mostly a formality. It still gives you a confirmation in writing.
For a device of EUR 200 to 400 without battery an extra paid add on just for the device is rarely worth it. Liability matters more: a falling panel can cause damage worth many times the price of the plant.
Step by step
Search your contents and liability terms for Balkonkraftwerk or steckerfertige Solaranlage.
Write a short notice with policy number, output, price, location and battery.
Send it to both insurers, and to your buildings insurer if you own the house and the panels are fixed.
Ask for written confirmation and file it with the receipt.
Register the plant in the Marktstammdatenregister within one month.
Report again after adding a battery, moving or changing insurer.
Checklist
Contents insurer informed and confirmation received
Liability policy without exclusion for power generation
Battery mentioned separately
Theft outdoors clarified for easy to reach balconies or gardens
Grid register entry done
Landlord or owners' association consent on file
Common mistakes
Thinking the grid register informs your insurer
Telling only the contents insurer and forgetting liability
Adding a battery later without a new notice
Reporting by phone without asking for written confirmation
Questions and answers
Frequently asked
Do I have to tell my landlord as well?
Yes, you need consent.
Since October 2024 a landlord may only refuse if it would be unreasonable for them,
but they can have a say in how it is fixed.
Will my contents insurance get more expensive?
Usually not.
Many insurers include the device at no extra cost;
some charge a little for theft outdoors or for batteries.
I have had my plant for two years and never reported it. What now?
Report it now.
A late notice is far better than none.
Is an email enough?
Yes, as long as you get a confirmation.
Follow up if there is no answer within two weeks.
What if my insurer refuses to cover the plant?
Switch to a policy that includes it at the next opportunity.
Liability cover matters more than cover for the device.
