S-series: Custom PV Integration

[bj00rn]

Has anyone done solar integration with S series without using the built in Solar PV integration? My inverter (Ferroamp) does not support SunSpec so it seems i'm out of luck there.

However, recent firmware versions seem to have added registers for Solar PV. All are currently undocumented 😞.

Writing solar output to eme20_api_available_power_42110 is reflected in the heatpump. (scale is off though writing 50 gives 0,5kW in the display`)

nibe/nibe/data/s1156_s1256.csv

Lines 1494 to 1498 in 34e94d8

	Offset cooling (Solar PV) MODBUS_HOLDING_REGISTER 2667 1 s8 -10 0 -1
	Offset heating (Solar PV) MODBUS_HOLDING_REGISTER 2668 1 u8 0 10 1
	Offset pool (Solar PV) MODBUS_HOLDING_REGISTER 2669 1 °C u8 0 10 10
	Cooling (Solar PV) MODBUS_HOLDING_REGISTER 2666 1 u8 0 1 0
	AUX (Solar PV) MODBUS_HOLDING_REGISTER 2675 1 u8 0 1 0

nibe/nibe/data/s1156_s1256.csv

Lines 1502 to 1504 in 34e94d8

	Modbus TCP/IP Ext. (Solar PV) MODBUS_HOLDING_REGISTER 2107 1 u8 0 1 0
	Modbus TCP/IP Ext.Include own consumption (Solar PV) MODBUS_HOLDING_REGISTER 2108 1 u8 0 1 0
	Modbus TCP/IP Ext. Available power (Solar PV) MODBUS_HOLDING_REGISTER 2109 1 u16 0 65535 0