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PSA: Deye 50kW (SUN-50K-SG01HP3-EU-BM4) communication fault with Sunwoda CIESS 60

Shadders
in Inverters

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We recently installed a SUN-50K-SG01HP3-EU-BM4 with a Sunwoda Oasis 60, model number CIESS 60. The battery is on the approved list we could find on the Deye website and vice versa the inverter is listed as supported on Sunwoda. When the communications cable is plugged in the inverter lights and screen flash in a "on-off" cycle and this bug stops the inverter starting up. The inverter runs fine on voltage control so it is linked to the BMS communication. Updating both the Sunwoda and the Deye brought no improvement.

We have been in contact with Deye service technicians and fortunately were able to identify an older firmware version that is compatible by referencing a colleague's site in Zambia.

HMI Firmware 2001-C048 works

The issue has been sent to Deye R&D.

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