Hi,
Electrical engineer here, heavily DIY oriented, trying to understand "the Victron ecosystem".
I want to build a Backup and Self Consumption power supply system for some of my house loads.
ESS "Optimize for Self Consumption" would be almost perfect for me, but unfortunately ESS is completely out of the question due to grid regulations.
Grid outages happen about 5 times per year.
I am considering a Multiplus II 48V / 3 kVA inverter, 10 kWh Winston LiFePo4 (16 x 200 Ah cells) and a two-signal BMS. I could afford to go for 4 x Pylontech US2000 boxes if it's worth the extra cost...
I also have room for 10 - 12 PV panels (250 - 300 Wp each) and a SmartSolar charger.
Requirements:
1. When the grid becomes available (on initial power-up of the system or right after a grid outage ends), charge the batteries from the grid up to a nice, crisp, 100%. After this initial grid-supported charging, DO NOT USE GRID TO CHARGE batteries, until after the next grid outage.
2. After this initial charging, only PV power should charge the batteries.
3. During normal operation, when battery SOC drops below 50%, stop discharging and switch loads to grid.
4. When PV power becomes available and battery SOC rises above, say, 60%, switch loads from grid to battery and PV.
5. If grid is down, support the loads from the battery down to, say, 5% SOC.
Can these requirements be met with Victron Equipment? What additional hardware do I need? Is a CCGX really needed? Are there any Assistants that can make the inverter behave like above?
Additional requirement (6). About half of the grid outages happen during the winter. Heavy snow + aerial power lines do not go well together. It also takes the most time to be fixed, due to bad weather. So...I also need to connect a backup generator into this picture. Would go nice with requirement 1, I should be able to fully charge the batteries during the day and run on battery power during the night. :)
Many thanks in advance!