Hello,
before to make some changes to my solar system i'm trying to understand how ESS feed-in works.
I know to have a fronius inverter is the best thing but i can save some money with a different brand.
A bit of data before the questions.I can convert 13 400W panels of my off-grid system into on-grid one with max 5Kw feed-in and keep the other 9 connected to 3 150/35 solar chargers, multiplus II and 30Kwh battery.
I already have 2 ET112 (not in use yet) and since we talking about a grid tied inverter i can't use it on the AC-Out side of the Multi (if i'm not wrong).
Question number 1.
If i understand well i can use grid-point 0 to not use grid power to charge my battery. If i place the first ET122 just before the meter (load side) it will monitor what it's happening for the grid part. If the grid-tied inverter produces 1000W and my house uses 300 and the battery is not at 100%, the remaninig 700 watts are used to charge the battery. The first doubt is how that power will be managed. In the vrm i can set the ac in limit not less then 6A, 1200W so i'm having some doubts. The multi will use a different setting to use just 700W for charging? Or it will get 500W from grid plus the 700W from the other inverter?
Question 2:
Feed in limit.
I understand i can set a max power feed-in but i don't understand if it's the multi alone or combined with the other inverter and read via ET112.
Example:
Max feed-in from contract is 5Kw and i set 5kw in the cerbo. The other inverter is producing and exporting 4000W , battery is 100% so the multi can feed-in the surplus of PV. How the multi will handle it? Just procude the 1000W
"missing" or it will generate 5000W plus the other 4000W in case it's not a fronius?
Thanks in advance for any answer.
Deunan.
