Inverter Control Architecture
HA Select / Number Entity
User changes setting in Home Assistant
SPH · SPF · MOD
WIT
Persistent Register Write
Holding registers 1000–3999
Takes effect immediately
Survives inverter restart
Set once and forget
VPP Time-Limited Override
VPP registers 30xxx range
Activates timed override
Expires on duration or HA restart
Inverter returns to TOU schedule
Read-back verification after every write