Photovoltaics in the allotment garden – planning of a stand-alone system

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More and more people are discovering the benefits of photovoltaics in the allotment garden. This environmentally friendly technology allows hobby gardeners to generate their own electricity while reducing costs. In this article we will look at important aspects of photovoltaics in the allotment garden, including module selection, demand calculation, connection and wiring.

Obtain/clarify permission from the association

The first step is to check with the association’s bylaws, the board of directors or neighbors to find out if it is even allowed to operate a photovoltaic system in your allotment garden site. Unfortunately, there is no uniform nationwide regulation in this regard. In this context it is also important to mention: a connection to the public power grid (feed-in) is taboo in any case. However, a balcony power plant in addition to the grid connection, as has become increasingly popular recently, should not be problematic. But here, too, it is better to ask the board of the allotment garden association.

Module selection

Choosing the right solar panels is critical to the efficiency and performance of your allotment photovoltaic system. Pay attention to the performance, efficiency and quality of the modules. Monocrystalline modules are considered particularly efficient, while polycrystalline modules are a more cost-effective alternative. Also consider the size of the modules and whether they fit your available space in the allotment.

Calculation of requirements

Before you install your photovoltaic system in the allotment garden, it is important to determine your own electricity needs. Analyze your average power consumption to determine how much power you need to generate. Also take into account seasonal variations and the influence of weather conditions. This allows you to determine the right number and size of solar panels to meet your needs. To determine the size of the battery to bridge sunless hours (or even days), we have developed a tool for calculating the necessary size of the solar battery.


Connecting your allotment photovoltaic system requires expertise and should ideally be done by a qualified electrician. The simplest form is a pure 12-volt network, which can be used, for example, to operate LED lights or a small refrigerator and charge battery devices such as smartphones or laptops. For 230-volt devices, an inverter then comes into play and professional installation should be done in any case (if not just a single one is to be connected directly to the inverter).

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The wiring of your allotment photovoltaic system plays an important role in the efficiency and safety of the system. Use high quality cables suitable for outdoor use. Make sure that the wiring is properly routed to avoid potential damage from the elements. Careful planning and installation of cabling ensures smooth power transmission and minimizes energy loss. In any case, the cross-sections must be adapted to the maximum current and fused accordingly. Here, safety plays the decisive role. Another aspect in the selection of the conductor cross-section are occurring losses. These depend precisely on the cross-section, on the voltage of the installation (generally 12 volts for simple installations), on the length of the line and on the power drawn (“wattage”). Below you can calculate the voltage drop.


Photovoltaics in the allotment offers a sustainable and cost-effective way to generate your own electricity. With the right module selection, an accurate calculation of requirements, professional connection and secure cabling, you can exploit the full potential of your photovoltaic system. Don’t forget that there may be regulatory permits or restrictions to consider when installing solar on your allotment. Therefore, always consult local professionals or experts to ensure that you meet all the requirements and that your installation is functioning optimally. Enjoy the benefits of solar energy and the green footprint you leave in the allotment!

In our second article on the subject, you will find more information about the planning and installation of a solar system in the allotment garden.

Disclaimer: When working with electricity, there is always a danger to life and a fire hazard. So if you are doing work on the equipment itself, be sure of what you are doing. In case of the slightest doubt, consult a professional!

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