The last three years have already delivered outstanding results. This year, KOSTAL and its PLENTICORE series inverters successfully proved themselves for the fourth time in the System Performance Index (SPI). For the first time, the PIKO MP plus single-phase inverter from KOSTAL in combination with a BYD battery also underwent the storage inspection and excelled.
2021 SPI: A brief explanation of the storage test
The solar storage systems research group at HTW Berlin compares the system properties annually on the basis of test reports provided by independent measurement laboratories. According to efficiency guidelines, storage systems are tested on the basis of simulations and evaluated with the so-called SPI.
For KOSTAL, the PLENTICORE plus inverter in the 5.5 and 10 kW power classes, the PLENTICORE BI 10/26 battery inverter and the PIKO MP plus 4.6-2 in combination with BYD battery boxes of the premium HVS design were put through their paces on the efficiency test rig.
In addition to KOSTAL inverters, fifteen other manufacturers took part. A total of 20 storage solutions were scrutinised.
For inverters in the 5kW and 10kW power classes, two reference situations were used to gauge the devices. In the first variant, a 5 kWp solar system with a home consumption of 5010 kWh per year was investigated. The second variant included a system setup with the same home consumption, operation of a 10 kWp solar system, supplying 2664 kWh a year to a heat pump and an electric car with an annual consumption of 1690 kWh.
2021 SPI: All the results at a glance
PLENTICORE plus 10 kW: Powerful performance - minimal conversion losses