Would like to use the energy price data provided by Tibber to load my Growatt Photovoltaik battery at times of lowest energy prices. Anybody done that and/or anybody who could help. I guess the tough part of a solution is to enter the Growatt Battery Management System. The Growatt App provides the opportunity to program specific time slots for loading the battery from grid. Manually that works. Now I would like to get this running automatically.
Check this forum, you can achieve this over modbus with an esp module:
Alternatively you could have a look at solar assistant, requires an SBC (pi3b+ or alternative)
Mind you that i have been operating this (modbus) setup for nearly a year. According to growatt this is not good for the health of the battery… I asked questions about soc drops, round trip losses etc. According to them this is because I change the charge/discharge settings “too often”.