The technology centre in Gmunden, Austria, operates a 22 kWp PV system.
One Fronius Symo Hybrid and two Fronius IG Plus inverters produce around 24 MWh of solar energy annually, 85 % of which is used directly in the company.
The local installer selected a BYD Battery-Box Premium HVM with a total capacity of 22.08 kWh for storage. With 8 solar modules of 2.76 kWh each, the maximum capacity was utilised. Thanks to this battery, the company’s self-consumption share will increase noticeably.
Two electric charging stations are connected to the building, with four further charging stations set to be installed in the future.
A secondary Fronius Smart Meter is integrated into the two electric charging stations at the technology centre.
Horst Gaigg – managing director of the technology centre – can therefore visualise the PV power used to charge the electric vehicles in Fronius Solar.web and analyse it down to the exact watt (= energy profiling). Thanks to the second Smart Meter, Mr Gaigg knows exactly how much of the PV energy is going into the e-charging stations. Gaigg then bills the tenants for the solar energy used for charging.Fronius Solar.web
» Our tenants charge their electric cars with the PV energy from the roof. «
Twenty-eight companies are currently registered as tenants of the technology centre. The PV power is used for applications including lighting, computer infrastructure and cooling the building. The stored energy serves to supply various base loads with PV power, even at night.
Multi Flow Technology, installed as standard in all Fronius Symo Hybrid inverters, leads to maximum efficiency. This feature allows the technology centre loads to be supplied with PV power and the battery to be charged at the same time, resulting in optimum utilisation of the system and an increase in self-consumption.
With the Fronius Symo Hybrid, three-phase loads (400 V) can also be supplied with PV energy in the event of a power failure. The prerequisite for this is the installation of a switch box.
“We have not yet enabled the backup power feature, but that will follow shortly,” explains Horst Gaigg.
Once the switch box has been installed, the Fronius Symo Hybrid in the technology centre will automatically detect if no power is available from the public grid and switch to backup power mode. The power then comes either directly from the photovoltaic system or from the battery. As soon as the grid supply is available again, the Fronius Symo Hybrid switches back to grid operation. With the Full Backup option, the Multi Flow Technology is also active during a power failure.
|System size:||22 kWp|
|System type:||Roof-mounted and façade-integrated PV|
|Fronius components and solutions:
||1 Fronius Symo Hybrid, 2 Fronius IG Plus, 2 Fronius Smart Meter, Fronius Solar.web
|Storage system:||BYD Battery-Box Premium HVM 22.1
|Annual yield:||24 MWh
visualisation of the e-charging stations in Fronius Solar.web thanks to
secondary Fronius Smart Meter