Location: Vizovice, Czech Rep.
Implemented services: In cooperation with NWT a.s., installed Amvolt Battery Pack 63.36 kWh, complete system of Victron Energy inverters, solar power plant 113.22 kWp
Costs: Amvolt Battery Pack 63.36 kWh, price: 25,977 EUR w/o VAT (PV panels and inverters not included)
The photovoltaic power plant with storage in the Amvolt Battery Pack on the premises of Czech traditional distillery R. Jelínek is connected to its own consumption. This means that the energy from the sun is always first and foremost consumed in the company's operation or stored in the batteries and only the surplus is sent to the distribution system.
The three modes of use of the system change continuously and automatically during the year. In the first mode, the production from the sun is higher than the actual consumption of the site. The excess production is stored in the Amvolt Battery Pack and any excess goes into the distribution system. In the second mode, the solar panels produce less than the current consumption of the campus and the difference is compensated from the batteries so that there is almost no draw from the grid. In the third mode, there is minimal or no production from the sun, the batteries are discharged and all energy is therefore drawn from the grid.
The transition between these modes is completely automatic and without user intervention.
The power plant consists of three basic units:
• 333 panels with a nominal power of 340 W
• Total power plant output 113.22 kWp
The total power value indicates the peak kW that the power plant can deliver under optimal conditions – relatively cool weather, direct illumination, and brightness. In practice, however, the value of production in kWh is much more important.
This PV plant has an annual production of 100–110 MWh of electricity.
Inverters (voltage converters) and optimizers
• 3 inverters with a total output power of 100 kW
• Optimizers for each pair of PV panels
Optimizers and inverters ensure the highest possible efficiency of converting solar radiation into direct current (PV panel) and then alternating current (inverter output), usable for normal operation. In the event of an accident – for example, a fire – the system with optimizers then ensures a safe voltage of max. tens of volts on the part of the power plant between the inverter and the solar panel
• 3 inverters with a total charging/discharging capacity of 36 kW
• Amvolt Battery Pack with LFP cells with a usable capacity of 63.36 kWh
The energy metering system at the entrance to the building is important for the correct operation of the entire system. The current and voltage measuring transformers on the supply cable give the inverters the information on whether the Amvolt battery pack should be discharged (mode when the consumption is higher than the photovoltaics production) or charged (the electricity consumption is lower than the current production).
In addition, the Amvolt battery system with Victron Energy inverters is able to act as an island (backup) for part of the site. In the case of the R. Jelinek operation, the bottling plant is completely backed up in this way. In the event of a prolonged power outage, the distribution of the Vizovice distillate miracle will not be compromised.
Costs: Amvolt Battery Pack 42 kWh, price: 19.500 EUR w/o VAT (PV panels and inverters not included)
Costs: Amvolt Battery Pack 21.1 kWh, price: 18,103 EUR w/o VAT (solar panels and inverters not included)