
Renewable
energy

Green wave for Berlin — heating with renewable energy!
Do you not only want to heat cost-effectively, but also do something good for the environment at the same time? Good decision! With our modern heating solutions based on renewable energy, you are focusing on sustainability and efficiency. Together, we are shaping Berlin's energy revolution.
- Photovoltaic systems
- Heat pumps & hybrid systems
- Local energy advice
- Sustainable solutions
- Independence from fossil fuels
- Diverse funding opportunities
- CO2 reduction
Personal
guidance
We listen and only recommend what fits
Focus on sustainability
Use resources wisely for people and the environment
Government subsidy advisory
We'll tell you what's possible so you don't waste money


When and where
does the future
actually begin?
The world we will live in tomorrow is created in the minds of those who understand that they can help shape it today. Do you see it that way too? Then let's do it together.
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Your path to independent energy generation!
Global thinking requires local action: With decentralized energy generation, you are making a valuable contribution to sustainable climate protection. Photovoltaics are a clear key factor in this. Because it enables you to produce your own electricity independently and sustainably — and with a clear conscience.
- Independence from public power grids
- Photovoltaics for sustainable power generation
- Battery storage for energy autonomy
- Optimum combination with heat pump
- Safe emergency care in the event of a power failure
- Selling excess energy at a profit
- Your contribution to climate protection and energy transition
Photovoltaics and battery storage: the future-proof combination
Shutdown of nuclear power plants. Coal phase-out. Political uncertainties in gas imports. Energy supply must be rethought. With your own photovoltaic system, you produce your own electricity in an environmentally friendly way, which you can also efficiently store and use whenever you need it with a suitably sized battery storage system. If you also integrate a heat pump, you can use the self-generated electricity even even more efficiently - for example for your heating or water heating. In this way, you can not only reduce your energy costs, but also actively contribute to climate protection.

Energy-independent and environmentally friendly: your best decision!
Your own photovoltaic system is much more than just an investment in your self-sufficient energy supply. It is an active statement for climate protection and a sustainable future. By combining photovoltaics and battery storage, you maximize your personal contribution to the energy revolution. Not only do you produce green electricity for your own needs, but you can even feed excess energy into the grid and thus benefit even more. In the event of a network failure, you will be still supplied with power via an emergency line.

We are happy to be there for you personally

Steinberg
As a project planner and building energy consultant at HGZ, I handle all matters relating to renewable energies. You can easily reach us via the direct contact form or by phone at 030 5497939-11.
Thanks HGZ! It feels great to be completely independent of oil and gas.
Got Any more questions?
We've got all the answers.
Here you can find frequently asked questions and answers on the topic of renewable energy in Berlin.
What is the difference between solar thermal and photovoltaic systems?
Solar thermal systems use sunlight to generate heat, which is primarily used for hot water and space heating. Photovoltaic systems, on the other hand, convert sunlight directly into electricity. Both systems can be combined to maximise energy efficiency.
How efficient are heat pumps compared to conventional heating systems?
Heat pumps are significantly more efficient than conventional heating systems. They can generate three to five times more energy than they consume. This makes them a cost-effective and environmentally friendly alternative.
What is the lifespan of renewable energy systems?
The lifespan varies by system type. Photovoltaic systems typically last 25 to 30 years, solar thermal systems around 20 to 25 years, and heat pumps around 15 to 20 years. Regular maintenance can extend the service life.
What happens on days when the sun does not shine or the wind does not blow?
On days with little sun or wind, energy storage systems such as batteries can bridge the gap. Alternatively, you can draw on the public electricity grid. A well-designed system takes such scenarios into account to ensure reliable energy supply.
How does installing renewable energy systems affect the value of my property?
Renewable energy systems can increase the value of your property, as they reduce energy costs and make the property more attractive to potential buyers. An energy-efficient home is increasingly in demand in today's market.
Are renewable energies also suitable for older buildings?
Yes, renewable energies can also be installed in older buildings, although additional adjustments may sometimes be necessary. A thorough on-site assessment helps to identify the best solutions for your specific building.
What subsidies are available for renewable energies?
There are various government subsidies available for the installation of renewable energy systems, including grants and low-interest loans from the KfW development bank and the BAFA (Federal Office for Economic Affairs and Export Control). We can provide advice on the available options and help you apply.
Can I become completely independent of the electricity grid with renewable energies?
Complete independence from the electricity grid is theoretically possible with a sufficient combination of renewable energy sources and storage systems. However, this requires careful planning and a significant investment. For most households, a hybrid solution – combining self-generated energy with grid connection – is the most practical option.
How long does it take for a photovoltaic system to pay for itself?
The payback period for a photovoltaic system depends on various factors, including system size, location, energy consumption, and available subsidies. On average, payback takes between eight and twelve years.
Which renewable energy systems could be installed in my home?
Depending on your home's location and structural conditions, a variety of systems may be suitable, including photovoltaic systems, solar thermal systems, heat pumps, or even small wind turbines. We offer a comprehensive consultation to find the best solution for your needs.
What are the benefits of renewable energies for me as a homeowner?
Renewable energies offer numerous benefits: they reduce your energy costs, make you less dependent on fossil fuels and rising energy prices, and contribute to environmental protection. In addition, they can increase the value of your property and may entitle you to government subsidies.
What is meant by "renewable energies"?
"Renewable energies" refers to energy sources that are naturally replenished, such as solar energy, wind energy, hydropower, geothermal energy, and biomass. In contrast to fossil fuels, they produce little to no greenhouse gas emissions and contribute to reducing climate change.







