LiPo4 battery selection

Recently I met someone who wants to install a solar system to augment the unreliable grid which frequently is under voltage as well as being subject to frequent blackouts. He is sold on LiPo4 despite my suggestion of using flooded LA, I've offered to help but my experience with LiPo4 is, less than limited. Having read threads of others using these batteries/cells it would appear that prysmatic are the way to go, rather than the so called drop in replacements. Done a fair bit of research and have narrowed it down to a few vendors, the price per Ah/cell is $0.75, so a 100Ah cell would be $75 or fractional divisions thereof , the one which stands out is a 24V nominal 240Ah, including a BMS self contained in an aluminum box, any thoughts or suggestions would be helpful. The charging/inverter hardware will most likely be SMA or Schneider due local availability, the capacity will be carefully calculated according to loads, which I'm reasonably well versed, there are so many options regarding cells and capacity, however the primary focus is the inclusion of a BMS, which makes sense, yes/no? This is a link to a possible vendor, I'm in Thailand so logically its reasonable to purchase semi locally for shipping considerations.
https://www.alibaba.com/product-detail/direct-manufacturer-24V-240Ah-deep-cycle_60703345450.html?spm=a2700.7724838.2017115.189.75021834gGbsEg
https://www.alibaba.com/product-detail/direct-manufacturer-24V-240Ah-deep-cycle_60703345450.html?spm=a2700.7724838.2017115.189.75021834gGbsEg
1500W, 6× Schutten 250W Poly panels , Schneider MPPT 60 150 CC, Schneider SW 2524 inverter, 400Ah LFP 24V nominal battery with Battery Bodyguard BMS
Second system 1890W 3 × 300W No name brand poly, 3×330 Sunsolar Poly panels, Morningstar TS 60 PWM controller, no name 2000W inverter 400Ah LFP 24V nominal battery with Daly BMS, used for water pumping and day time air conditioning.
5Kw Yanmar clone single cylinder air cooled diesel generator for rare emergency charging and welding.
Second system 1890W 3 × 300W No name brand poly, 3×330 Sunsolar Poly panels, Morningstar TS 60 PWM controller, no name 2000W inverter 400Ah LFP 24V nominal battery with Daly BMS, used for water pumping and day time air conditioning.
5Kw Yanmar clone single cylinder air cooled diesel generator for rare emergency charging and welding.
Comments
As long as you place the battery in an isolated area where it is unlikely to allow it's fire to spread into house or nearby land, you are pretty much on your own. The quality of BMS varys greatly, and the interaction between charging source and BMS and Load and BMS is currently poor.
|| 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-Lister ,
It is an advanced project that I would not use for a client if there was something pre-made. As Mike said alot of quality issues!
There are excellent choices but it will cost you. I do not see it getting much better in the near term. An example below that I use.
Discover by AES is a direct replacement with xanbus in a 6.5KWH. They are around a thousand dollars per KWH which is typical for LFP
They will take the surge from an XW without damage as the guys who built it worked for Schneider. They are building an interface for Outback at this time. The model below is available in 24V also.
htps://offgridsolar1.com/
E-mail [email protected]
Second system 1890W 3 × 300W No name brand poly, 3×330 Sunsolar Poly panels, Morningstar TS 60 PWM controller, no name 2000W inverter 400Ah LFP 24V nominal battery with Daly BMS, used for water pumping and day time air conditioning.
5Kw Yanmar clone single cylinder air cooled diesel generator for rare emergency charging and welding.