My Mom has an 2,800sq/ft offgrid house up in the Colorado mountains. Her lead acid bank (48v ~340ah) is about dead. She needs a replacement by Christmas (parts should arrive in time). I am hoping you all can tell me what I may be missing since I am under a bit of a time crunch and don't have my usual months long research cycle to get up to speed.
Already Installed:
SCC - FlexMax60 (FM60-150VDC)
Inverter - Magnum Energy 4400watts (MS4448PAE)
EDIT: 9 qty SCHUCO 235w panels from 2011 - 2.1kw (She probably needs to plan on increasing this)
LiFePO4 ordered - Thanks Jenny Wu!
16 EVE 280ah cells
Daly 16s 200a BMS - From Current Connected
My assumptions/questions
I feel like I have huge gaps of knowledge on physically building the bank and the various techniques and benefits there. Lots of youtube videos on this though.
My google skills are pretty good, but I don't know, what I don't know.
Already Installed:
SCC - FlexMax60 (FM60-150VDC)
Inverter - Magnum Energy 4400watts (MS4448PAE)
EDIT: 9 qty SCHUCO 235w panels from 2011 - 2.1kw (She probably needs to plan on increasing this)
LiFePO4 ordered - Thanks Jenny Wu!
16 EVE 280ah cells
Daly 16s 200a BMS - From Current Connected
My assumptions/questions
- Programming the SCC to 3.65 max and 2.5 min according to the EVE battery details
- Programming the BMS to the same values above? or different? - should this not come pre-programmed?
- I need to compress/tape the cells together because that helps with long life? - I think all-thread would be my preferred method. (0.21c charge rate)
- Wiring will be the proper gauge of welding wire with hydraulically crimped ends (I have the tool and experience for this)
- Do I need additional DC fuses/breakers? - if so what do you suggest?
- I don't believe I will fry the SCC if the BMS cuts the cells? - anyone have experience with the outback solar flexmax doing this?
- Can I add another 16s battery bank in parallel to this bank in the future? - I'd assume this would be with an additional solar array and charge controller in parallel as well.
- Do I need to top balance the cells when I receive them? Can I skip this step if cell voltages are close (how close)
I feel like I have huge gaps of knowledge on physically building the bank and the various techniques and benefits there. Lots of youtube videos on this though.
My google skills are pretty good, but I don't know, what I don't know.
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