Next generation commercial inverters now available from Delta

Extending its RPI series inverter line further, the leading global provider of power and thermal management is introducing new smaller and lighter 15 kVA and 20 kVA inverter models for Europe.
(PresseBox) (Teningen, ) The new three phase transformerless inverters RPI M15A and RPI M20A are next generation models displaying substantial improvements in power density, peak efficiency, and thermal performance in comparison to the previous generation 15 TL and 20 TL. A reduced weight and compact form factor provide the new M15A and M20A with exceptional power density. Further improvements include a high peak efficiency up to 98,4 %, a noteworthy increase from the former peak efficiency of 98,0 %. Thermal performance is enhanced in the new units with an increased derating temperature up to 49 °C when the inverter is operating with nominal AC and DC voltages.

For the system planner, maximum flexibility is ensured thanks to a wide input voltage range of 200 – 1000 V and 2 MPP trackers. Asymmetrical loading (33/67 %) is also possible, ensuring maximum yield in large commercial rooftop installations with multiple roof orientations.

Since the weight of both the M15A and M20A are 36% less than the previous generation models, IP65 protection class is offered for indoor or protected outdoor installation and both units ship with a versatile wall mount bracket, installation is flexible and greatly simplified.

The M15A and M20A are the perfect choice for large commercial PV installations and are particularly advantageous for those enterprises with power demand during the daytime, that can maximize the consumption of the PV energy produced by their PV plant and reduce the volume of purchased electricity needed from the grid.

The units are multifaceted and are compatible with many different commonly available solar modules and system components.

Initial M15A and M20A inverters for the European market will be made available to order beginning in March 2015.

More information can be found here:


Delta Energy Systems (Germany) GmbH
Tscheulinstr. 21
D-79331 Teningen
Andreas Schmidt
Eric Thorsrud
Marketing Manager
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