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Voltpool Haussysteme
Voltpool Haussysteme
Wind Power
The energy potential from wind is caught by vertical or horizontal rotor-blades and transformed into electric energy by a generator within a mechanical process. Small wind turbines are used in residential areas. These can generate energy independent of weather conditions and seasons. A wind power system is a real alternative to photovoltaics.
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Solar Heat
The sun (solar) is pure energy. Parts of this can be transformed into warmth (thermal). Solar collectors capture the warmth of the sun on a concentrated surface and introduce it into a thermal cycle so that it can be used (in the household, for example).
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The photovoltaic (PV) effect, which is also known as photovoltaics, is a process during which visible irradiation from the sun (light particles or photons) are transformed into electric energy (volt). About 60 elementary solar cells constitute a PV module. Environment-friendly electric energy can be generated with a few modules which have been integrated into a system.
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Street Lighting
We select our street lighting systems according to important criteria such as exclusively renewable energy sources, modern and stable devices and components and specific security gadgets in order to guarantee their unlimited use in extreme climatic conditions. In our large portfolio we have included ideal lighting solutions for private and business customers.
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Solar Carport
A solar carport is more than a protection for your vehicle against weather conditions. Equipped with PV it becomes an energy generating system. This way, it is possible to provide an electrically powered vehicle with direct environmentally friendly energy. The energy can also be used in the house or fed into the public electricity grid.
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LED Light
The LED technology is a very efficient electric lighting technology. With an optimized temperature management LEDs are expected to work in conditions of normal usage for about 50,000 hours. VOLTPOOL relies on good and robust components which also anticipate the design for all areas of use.
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Infrared Heater
An infrared heater makes use of a very effective technology to produce warmth from electric energy. Immediately after switching on the device heat is discharged through radiation and reflection without warming the air. As opposed to common heaters, the infrared heater is an efficient way of heating with electricity.
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Heat Pump
A heat pump is a thermo-mechanical system which extracts low temperature thermal energy from the surrounding air, water or ground and emits it with a higher temperature after processing in a cycle. A heat pump is an excellent solution for the use of warm water or for supporting the heating system.
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Charging Station
A charging station is a piece of electro-technical equipment, i.e. an enlargement of a solar carport. The battery of an electric vehicle can be charged with locally produced energy. A charging station can also be used independently of a solar carport. VOLTPOOL generally relies on components which use the advantages of renewable energy sources.
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Hot water storage tank
A hot water storage tank is a container which is thermally highly insolated. It is suitable for the storage and output as well as the production of warm water. Depending on the thermal source other names such as buffer storage, electric boiler etc. can be applied. VOLTPOOL relies exclusively on technologies that use renewable energy sources such as solar collectors or heat pumps.
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Energy Management
The ideal organization of (optimally) self-produced energy helps to use this energy in an economic and consumer-optimized way. A gentle use of energy resources contributes to CO2 reduction and protection of the environment.
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In order to use electricity produced by photovoltaics and some wind systems in the household it needs to be transformed directly after it has been generated. The inverter is a device which transforms direct current into alternating current and renders it applicable for local electricity consumption. It also regulates the optimal network integration into the power grid.
Battery storage
A battery enables an effective storage of electric energy from renewable sources. This way electric devices can be provided with green energy even at times when energy production is impossible or insufficient. VOLTPOOL relies on three battery technologies: lead, lithium and vanadium.
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small wind turbine

The small wind turbine currently still leads a niche existence in Germany. This is due to the fact that there exist many different manufacturers whose price-performance ratio is not always transparent. But most of all it is due to the complicated authorization procedures, which are organized by each municipality in Germany separately and not as a common process. The economic viability of a small wind turbine needs to be examined very thoroughly as the acquisition costs are still quite high; state subsidy is based on the German Renewable Energies Act (EEG).

VOLT – Tech wind current

A small wind turbine in residential areas on single and multi-family homes is a realistic alternative to the technology of photovoltaics, for example, in order to produce electricity self-sufficiently from renewable sources. In order for the investment to be worth while, a detailed economic efficiency calculation needs to be carried out, considering key factors such as self consumption and energy potential of wind current at the locality. Not all localities offer the ideal conditions for a cost-efficient and economic implementation of a small wind turbine. VOLTPOOL relies on long-term nature and sustainability. This is why we choose exclusively profitable components if the necessary conditions for an optimal wind current production have been fulfilled. Convince yourself of our professional handling of your energy project. We will be pleased to tell you which devices and components from our portfolio we consider best for your project or else with which alternative energy solutions you can produce optimum yields.

Rotor Orientation

The horizontal small wind turbine

The horizontal small wind turbine is based on the classical technology which is also known from large wind turbines. Rotor blades are attached to a circular panel on a mast. This technology has proven over decades and is technically mature, which is the reason for a high power coefficient. The horizontal wind turbine has two variants: firstly, the fast-runner, which has fewer blades and a higher power coefficient, and secondly, the rotors which function according to the principle of resistance. This system has many big blades (8-10). The fewer blades the system has, the better defined the blades are in order to use the wind optimally. Fast-runners produce the higher power coefficient, but also produce more emissions – in the case of wind energy this is noise and shadow. The resistance-rotors are heavier, which presupposes higher initial wind speed, which again resumes in the fact that the power coefficient is not quite as high. The advantages are the lower emissions, the lower noise development and the constant shadow as opposed to the shadow strike.
Horizontal wind turbines are subdivided into three categories: Mikrosystems, which have a height of about 30m and a rotor surface of about 5m². Low installations have a maximum height of 10m and a rotor surface of about 5m². Normal systems have a maximum construction height of about 30m. The area of wind attack is calculated with about 200m². In this case a system can generate about 60-70 kW performance.

The vertical small wind turbine

Vertical small wind turbines are most appropriate for urban areas, as they have a lower construction height. Their design contributes towards an image improvement.

Darrieus technology

The Darrieus technology operates with the buoyancy principle. Rotation operates via a vertical axis. This system needs laminar flow. The advantages of the Darrieus technology are visible in the urban area: The system is cheaper with lower shadow and noise emissions.

Savonius technology

The Savonius technology operates with the resistance principle. The spades of this system catch the wind. This technology is also advantageous in urban areas, because it can generate energy effectively in turbulent wind areas, i.e. in areas with high agglomeration.

Requirements for small wind turbines

There are many requirements for small wind turbines, which depend on each other. VOLTPOOL can facilitate the complicated procedure for you with the registration-support.

Location analysis

Before the installation of small wind turbines the location needs to be analysed and measured for about three months to identify the potential yield. The wind is measured, the production of energy is compared to the consumption. When calculating the location, the effective interest of the investment needs to be considered. The system has to ensure a maximum of self-sufficiency and minimize the supply by the public network. We gladly calculate these factors for you.
We collaborate with manufacturers of whose quality and technologies we are convinced. We have considered the best in our portfolio of about 640 manufacturers. Our close collaboration facilitates us the location analysis and the authorization procedure. We can name you locations of reference.

Profitability analysis

The expenses which you have for the acquisition of a system and also the side costs, the running costs and the capital costs are faced with the profit calculation. The self-sufficiency can be contrasted to the current costs from the public network provider. The feed-in remuneration has a positive effect on the yields. The highest yield is generated, however, when the small wind turbine offers the consumer complete independence from the public network. We calculate the profit potential of your small wind turbine individually. 

Acquisition costs

Usually a small wind turbine costs between 3000 and 5000 €/kWh return. These costs include expenses for the components such as rotors, masts and inverters.

Side costs

Consider the expenses for the authorization procedure, the foundation and the connection of the system to the public network.

Running costs

Running costs include expenses for insurance, taxes, maintenance and capital.  Also consider reserves for possibly necessary repairs or the exchange of devices.

Authorization procedure

The authorization procedure for small wind turbines in Germany is complicated, as it is not implemented on a federal level, but underlies the responsibility of the separate municipalities. The county decides whether a project is checked in the frame of a preliminary application for construction or with an application for planning permission. Requirements for the authorization are the adherence of border margins due to the exposure to emissions, the statics, an analysis of the natural scenery and an attestation of nature protection. Further points which need to be considered during the planning process of small wind turbines are defined individually.   

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[Translate to English:] Live-Monitoring für Ihre Energieanlage. Alle Dokumente im Überblick.


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VOLTPOOL quality

Voltpool quality

  • We perform an individual location analysis for you (wind frequency, wind speed, measures for dimensioning)
  • We calculate potential yields and the profitability of your system
  • We mediate between you and your administrative authority to facilitate the authorization procedure for you
  • We guarantee transparency and customer-oriented consulting
  • Consulting, installation and maintenance from a single source