Katarzyna Baran lives in a zero-energy house in Poland and uses a roof-mounted PV system of just under 10 kWp to generate power. A Fronius Symo 10.0-3-M inverter produces approximately 10,000 kWh of CO2-free solar energy a year. Ms Baran uses this not only for her household electrical appliances but also for the electric heating and to charge her electric car.
In addition to the normal loads, Ms Baran’s zero-energy house also supplies the heating and her electric car with PV power, meaning all her energy needs are covered by solar energy. This shows photovoltaic systems pay off from the first day of their investment, as the energy for heating and charging electric cars would have to be purchased without a PV system. However, since Ms Baran can use the energy generated from her own roof, the investment costs have paid for themselves within a few years.
Ms Baran's system pays off in fewer than eight years.
Ms Baran’s system is registered in Fronius Solar.web. Both her and her installer can conveniently monitor the system and analyse the values via the app. When a service is required, the installer receives automated messages via e-mail, which enables them to quickly fix defects. They can also carry out updates for the system via remote maintenance, saving on costs for travelling to the physical location of the system and staff deployment.
As an installer, you can also give your customers good advice on electricity consumption behaviour – the analysis of the production and consumption of the PV electricity clearly shows how the residents can better use their loads to optimise their self-consumption.
One potential improvement for Ms Baran’s PV system would be the installation of additional smart meters for strategically important loads such as the heating or the wallbox. With this measure in place, her installer could analyse the system in greater detail via Solar.web.
With the help of Fronius Solar.web, it is possible to simulate the effect of upgrading a system with a battery in terms of savings and self-consumption. This tool can be used by installers to demonstrate possible system upgrades to their customers. By configuring a few settings, they can simulate the impact of integrating a battery into any system registered in Solar.web that has a Fronius Smart Meter.
In addition to the obvious financial benefits, Ms Baran is also reducing her carbon footprint. Her system generates approximately 9,800 kWh of clean, sustainable photovoltaic energy annually. This corresponds to a CO2 saving of around 5,000 kg.
|Size of installation||9.9 kWp|
Fronius Symo 10.0-3-M
Fronius Smart Meter
|Modules||Selfa 275W Full Black|
|Annual yield||9,800 kWh|
What is a zero-energy house?
The term “zero-energy house” is used when the amount of externally sourced energy can be offset by the self-generated energy (e.g. by a photovoltaic system) during a certain period of time.