Hi all, looking for some advice on how to setup an energy storage system with my Multiplus-II 2x120v. I've read extensively on the ESS assistant, which seems to be pretty close to what I'm looking for, but lacks PowerAssist which in my case would be an issue. Basically I am looking for a way to control my MP-II to do the following. I have used Raspberry Pi in multiple automation systems so a library, script or community tool would work for this.
Installation Details:
- 12.9 KWh 8s2p LiFePO4
- 20a single phase AC-In grid circuit for passthru/charging
- Critical loads subpanel on AC-Out sized to run up to 45a of loads (20a grid + 25a inverter)
- Not grid tied, no backfeed into grid should be possible.
- No solar or generator
Requirements:
1. Ability to set a charge window of 12am-6am to take advantage of favorable rates from grid
2. NO FEED back into the grid.
3. Able to connect to grid instantly if loads exceed 2000w and switch back to off-grid when below 1500w
4. Able to connect to grid if SOC or voltage drops below a certain threshold (but ideally, NOT charge batteries until 12am).
5. Able to continue using Power Assist when load is > 2000w and connected to grid
I have been able to do number 2 through 5 without the ESS assistant at all, but #1 is a challenge due to lack of scheduled charging in the base firmware. What other options for more customized control can I explore?