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payback period

Glossary lexicon

payback period

Degree of self-sufficiency

Balcony power plant

Reference counter

Lightning protection

Federal Network Agency


Roof alignment

Roof hook


Diffuse sunlight

Direct sunlight

Thin film solar module

EEG feed-in tariff


Power socket

feed-in tariff

Energy return time

Renewable energy

Fossil energy sources

Direct current

Global radiation

Base load

Island network


Kilowatt peak (kWp)

Kilowatt hour (kWh)

Communication gateway

Power density

Tenant electricity


Mini PV

Mini solar system

Module string

Module efficiency


Monocrystalline solar module

Angle of inclination

Off grid


Photovoltaic module

Plug-in solar system

Polycrystalline solar module

Low light behavior


Solar module

Solar module for the socket

Solar power storage

Solar inverter

Solar cells

Solar energy

Electricity mix





Alternating current

Wieland power socket


Bidirectional counter

Amortization describes the process in which income generated covers an investment made. In photovoltaics, the payback period describes how long it takes until the electricity yield of a system is higher than the investment costs. An example is a purchase of €800 and annual electricity income (electricity saved by the network operator €0.28/kWh * 600kWh annual yield) of €168. This roughly corresponds to the costs and income of a balcony power plant. The payback period is 4.76 years (€800/€168). From the 5th year onwards, the system works to maximize profits. Today in 2023 the payback is much faster. The system costs are less than €800, generate more power and the electricity costs are also significantly higher than the €0.28/kWh stated here.

For a balcony power plant, the payback is around 3-5 years, while classic house photovoltaics pay for themselves from around 15-18 years. The background is, among other things, the assembly costs and electrician costs, which are eliminated with a balcony power plant.

Here you can see graphically how the investment of €800 represents an expense in the year of purchase and then generates profits year after year. From the 5th year, the amortization year, a plus is generated. Here you can find our balcony power station 600W and balcony power station 800W


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