Looking for a hardware partner to help with integration of Z-wave in emonTx V3

Hi all,

For a client I am looking for a Z-wave plus enabled energy monitor. I am very interested in the emonTX V3 but this lacks the Z-wave capability. I am looking for a partner that could help me with a custom design and production support. Batch of around 200 to 500 units.

Update frequency < 1/s
Energy better than +/- 0.1kWh (two counters per phase)
Power better than +1/- 1W (Direction is required as well)
Current up to 100A per phase
Voltage 80 - 240V
Communication Zwave Plus

I hope that there is somebody here that would be able to help.

Regards, Lasse