Mike90250 I wondered about that also ,And what fails first, the intergal BMS, or the cells ? Which ever fails, the wife will not like it with no lights.Thats why I bought individual cells . easy to replace one defective cell ,, just unbolt it
Lead Acid vs Lithium Iron Phosphate ( LFP; LiFePO4 )
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Here is a site State side that has 48v 100ah batteries http://www.lionev.com/battery_packs.html for $2320 which is about what John was quoting - Lifetime Warranty = Hope this helps.
PS - The EV DIY car forum has a lot of info on LiFePO4 cells and compare them to LA - For low voltage the simple way is to find the cell which discharges the most and monitor this with a relay - apparently this is the way it is done with LA also. As far as balancing - as long as you use a LA charger the balancer is quite a simple device that discharges back all cells to the voltage of the lowest charged cell.Comment
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Sorry DAVE that is not quite right . attached is a picture of a 48v battery with BMS built in, as you can see it just lookes like "normal" truck or large deepcycle batteryAttached FilesComment
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Hi Mike,
How many kWh for that?
say it's 5kWh ...
5000/51.2=98Ah at 70% DOD that's 140Ah LFP pack - I would recommend talking to this guy - mention Steve from New Zealand.
Chris Zhang [sales02@chinabatterycenter.com]
Should be US$2300 (+FGT+TAX) roughly for 100Ah 48V(16 cell) with a BMS built in.
I have 48 of these cells in my setup.Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-ListerComment
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Isaid in all the posts that THE BMS IN INSIDE THE BATTERY THE CIRCUIT BOARD IS JUST UNDER THE TOP OF THE BATTERY AND THE "REGULATORS " ARE ON EACH CELL.
A long time ago their wb site was better it di show ALL THE BATTERIESComment
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