Good day,
I am Off-the-Grid (24V) and have only a simple System running which work perfect, except for the SOC.
I use 4 battery sets of each 735Ah at a C100 and use 4 BMV702 plus 4 BatteryBalancer.
Currently I charge my Batteries (I sucked 1680Ah out of 2940) from a Generator but one thing pzzzle me since quiet a while.
If i have a nominal C100 capacity of 2940Ah, i can get only 2352Ah (80%) out at 20°C, hence in the summer it is perfect.
Now in the Winter I get only 60%, hence 1764Ah, out, and then my batteries are at 22,2V.
However, the SOC state, that I have still 45% left.
Do my four BMV702 work correctly or do I miss a setting?
I have this question, because the Grid Provuder Elektrilevi has installed a 75kVA Transformator near by and it is standing on our ground, hence I can dig a 200m trench myself, but an AXPK 4G25 in the ground with a connection box at the end and have only to pay 1500€ for connecting (plus my cable and digging) it instead of 36000€ letting them doing it.
And I can connect to the Grid to feed-in.
Also in Spring I will get my new batteries with 7329Ah (8 sets) with in toral 175kWh.
So, how do I then config (Dynamic) ESS for this odd SOC?
Note: On Tuesday 2923-11-21 we had energy prices whic i have not seen in the last 6 years in Estonia:
06 - 07: 21.722
07 - 08: 66.004
08 - 09: 58.559
09 - 10: 65.995
10 - 11: 47.75
11 - 12: 48.218
12 - 13: 58.556
13 - 14: 48.01
14 - 15: 39.598
15 - 16: 58.553
16 - 17: 93.262
7 - 18: 41.461
18 - 19: 24.002
Hence with my singel MultiPlus-II 24/5000 i could have feed-in 13h 3,8kW or 49kWh and earned 25,5€.
However, I plan to install three Fronius Symo 10-3 ACin coupled and a 3,5kW Windmill ACout cozpled (should deliver in my location at kwast 16MWh a year) in addition to my existing 1,86+4,10+5,5kWp Solarpanels and 5 windmills with 7,4kW in total.
Currently I have a trailer with 2175Ah of batteries with a Quatro 48/15000 here which emulate the Grid, but i can not get my system correctly wirking because of the SOC, the training videos on victron-professional did not help me with this problem.
Thankyou for your help and tips
