Install a Balcony Power Plant: Costs, Subsidies, and FAQ – The Complete Guide

Everything you need to know about installing a solar power system

What is a balcony power plant? The Basics

What is a balcony power plant? A balcony power plant is a miniaturized solar power system specifically designed for tenants and homeowners. With an output of 300 to 800 watts, you can significantly reduce your electricity consumption – without complicated permits.

The system consists of:

• Solar modules (usually 1–2 units. The current trend is to install as many solar modules as possible, if space allows. Although the output per module may temporarily be lower, as the inverter limits it during sunny peak times, the total electricity production of the system increases significantly. Especially in the morning and evening hours, the inverter is utilized more effectively, generating more energy throughout the day.)
• Inverter
• Plug and cable
• Optional: Storage for surplus electricity

How to install a balcony power plant? Step by step

Step 1: Choose a location

Where is the best place to install your balcony power plant?

• South-facing ideal (south-west or south-east acceptable)
• No strong shadows from trees or buildings
• Sufficient load-bearing capacity of the balcony or roof

Step 2: Permit

Do you need to register anything?

• Up to 800 watts: Only registration with the grid operator is required
• In many federal states: No separate permit required
  

Step 3: Assembly

How do you install the modules?

1. Mount solar modules on the frame
2. Connect the inverter
3. Plug into a standard Schuko socket

Step 4: Commissioning

What needs to be done after installation?

• Register the system with the grid operator
• Optional: Connect storage
• Observe initial electricity production

Save costs with 0% VAT

How do you benefit from the current subsidy?

The German federal government has reduced the VAT on solar power systems to 0%. This means:

System without VAT exemption	System with 0% VAT
€600 + €114 VAT = €714	€600 = €600
You save: €114

Important note: The 0% VAT is a government regulation and applies to all providers – not just specific brands. However, ask if the provider passes on this tax benefit.

Balcony power plant costs: What does a solar power system cost?

Acquisition costs (with 0% VAT)

Type	Output	Price (approx.)
Beginner	300W	€250–350
Standard	600W	€400–600
Premium	800W	€600–900
With storage	600W	€800–1,200

Annual costs

• Maintenance: approx. €0–50 (mostly self-sustaining)
  
• Meter fee: mostly free

Income/Savings

• Electricity savings: €150–300/year (for 800W)
• EEG levy: no longer applies since 2022
• Amortization: 1–3 years

FAQ – Frequently asked questions

❓ How do I install a balcony power plant as a tenant?

As a tenant, you are generally allowed to install a balcony power plant, as long as it does not result in permanent structural changes to the rented apartment. The installation is not subject to official permit requirements if it is carried out professionally. It is recommended to inform the landlord and obtain their consent – ideally in writing – to avoid later disputes. After commissioning, the balcony power plant must be registered in the Market Master Data Register (MaStR) of the Federal Network Agency. A separate registration with the local grid operator is no longer required.

❓ Is a storage unit worthwhile for my balcony power plant?

What is a storage unit? A battery that stores surplus electricity. With a storage unit, you increase your self-consumption from approx. 30% to up to 70%. The investment pays for itself in 3–6 years.

❓ What output do I need?

That depends on your electricity consumption. For a 2-person household, 300–800W is sufficient. 

❓ What happens in strong winds or storms?

Modern balcony power plants are designed for wind loads up to 120 km/h. Secure installation is crucial.

❓ Do I have to change my meter?

Often not with modern digital meters. 

Conclusion: A balcony power plant is the easiest way to save money and protect the environment at the same time. With 0% VAT and easy installation, getting started is more worthwhile than ever.