tweekzilla
New Member
- Joined
- Jun 23, 2021
- Messages
- 34
First post!
I'm thinking of moving most (not all) of my main-panel circuits (including a fairly low power A/C unit) onto an off-grid panel that is powered by a growatt 12000T. The main reason for this is TOU load shifting (our afternoon rates in socal are 60c/kwh and going up). I do currently have a grid-tie solar system which I will leave in place. The plan is to charge the batteries at night (cheap electricity) from the grid via the inverter and when the price of electricity gets expensive switch over from grid-power to battery+solar on the subpanel. If I run out of power (battery/solar) then the inverter would switch back to grid via the transfer switch. Whilst the load is shifted the grid-tie solar will be racking up TOU credit that I can put towards cost of electricity at night (and electric car charging).
A) does this make sense?
B) Does the growatt 12000T have any kind of ToU settings - i.e. priority Grid between 10pm and 8am then priority solar->battery->grid between 8am and 10pm? If not is there an API so could program it via a raspberry Pi?
C) Any gotcha's with this idea? i.e. you loose power for a brief second when the transfer switch kicks in for example?
I'm thinking of moving most (not all) of my main-panel circuits (including a fairly low power A/C unit) onto an off-grid panel that is powered by a growatt 12000T. The main reason for this is TOU load shifting (our afternoon rates in socal are 60c/kwh and going up). I do currently have a grid-tie solar system which I will leave in place. The plan is to charge the batteries at night (cheap electricity) from the grid via the inverter and when the price of electricity gets expensive switch over from grid-power to battery+solar on the subpanel. If I run out of power (battery/solar) then the inverter would switch back to grid via the transfer switch. Whilst the load is shifted the grid-tie solar will be racking up TOU credit that I can put towards cost of electricity at night (and electric car charging).
A) does this make sense?
B) Does the growatt 12000T have any kind of ToU settings - i.e. priority Grid between 10pm and 8am then priority solar->battery->grid between 8am and 10pm? If not is there an API so could program it via a raspberry Pi?
C) Any gotcha's with this idea? i.e. you loose power for a brief second when the transfer switch kicks in for example?