Eastron SDM630-Modbus, Down counter incl. 2x S0, MuFu meter for DIN r
Beaxutcizh DDS5188 LCD Digital Din Rail Electric Meter Single Phase, 220V, 5-25a,Kilowatt Hour Kwh Meter with S0 Port: Amazon.co.uk: Business, Industry & Science
KWH Counter - Let's Control It
S0 pulse counter help - Configuration - Home Assistant Community