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Started by qrper, October 24, 2020, 11:46:46 AM
Quote from: Steve_S on October 25, 2020, 08:37:06 AMI hear you on the Lead Acid haters... I'm in North Eastern Ontario Canada not far from Algonquin Park, I know about Cold Hahaha... The old FLA (Rolls Surettes in my case) handles pretty much anything thrown at them and even into the cold. Weak or discharged FLA can freeze but they have to be pretty much dead with little no volts to do so. Some of the LiTHIUM Battery boosters are a bit much.. it's worse than the Ford VS Chevy / Apple versus IBM type of shmack... If You run into that press IGNORE and move on.I myself am now in transition from FLA (856AH) to LFP (910AH) (LifePo4). The FLA Bank (Bank 1) will remain in service as my secondary and Bank Two consists of four LFP Packs. Now I have a separate Powerhouse which is also my Pumphouse that contains the 50 Gallon Pressure Tank, as a result, I have to heat it and so keep it at 50F. The Concrete slab is insulated and has Pex embedded for Radiant Radiant Heating (planned to use passive solar, drain back system), the building itself is hyperinsulated (R24 Walls with thermal break SIP style). At present it is heated using a recovered Suburban NTS-20 RV Furnace from a new / wrecked RV, it has electronic ignition and only uses 40 Lbs of LPG per winter and runs on 12V. The powerhouse is only 90 square feet.Lithium Chemistries vary a lot and some catch fire, others don't, some work in the cold (up to -45) others do not tolerate anything below 32. The most common & appropriate chemistry for Home ESS (Energy Storage Systems) is LiFePo4 because it is the safest of the chemistries (no explosions or fires) and no Cobalt either. Even some LFP is good to -45 ! (Premium cells from Winston for example are Yyttrium Doped for cold handling) A very common method to keep ESS Battery packs warm is to use a thermostatically controlled silicone warming pad that is connected to the battery itself. Of course, the battery packs also need to be within an insulated box to keep the warmth. The nice thing about an LFP ESS, is that can be inside your building, garage, basement so the whole keeping them warm thing kind of depends on the application & environment intended to be used in.BTW, over at https://diysolarforum.com/index.php we are pretty friendly to anyone (albeit there are always a few "Preachers") but unlike other sites, it's pretty calm cool & collected.
Quote from: ClassicCrazy on October 24, 2020, 12:03:25 PMMy brother used to have some old telecom phone company batteries sort of like yours - real old ones . He swore by them because they would run big loads via his inverter. But they were so old they had huge self discharge rate and were pretty much just like capacitors at that point. Took me a long time to convince him he was putting his power into a bucket with lots of holes in it and it leaked out fast. Larry
Quote from: qrper on October 25, 2020, 03:33:19 PMso, i'd be looking at about $3400 to equal the 25kWh of the usable capacity of my lead acids?Shipped from china to here? YES that is to USA & Canada Figures are as posted in USD, Amy Wan is the Rep and she's great, will answer your questions if any