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    Looking for a list of Prismatic LiFePO4 cell sizes

    Trying to replace a 9"x 9" X 8" lithium ion 24V 130Ah battery with 8 LiFePO4 cells and BMS. Having issues with current solution and changing format of the existing box is very cost prohibitive. really hoping I can find some and source them here in the USA as that would be a huge plus vs...
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    Looking to replace these 6T batteries 24V ~125-150Ah

    They have obsoleted the 125AH NCM and 150Ah NCA variants for poor cycle life. They only offer the 103Ah shown here, but its just too little capacity for my mimimum runtime. https://www.bren-tronics.com/bt-70939.html Was wondering what my best option are that fit in the same exact space as we...
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    LVX6048 Burned up on day 1 searching for cause

    My dad and I installed this LVX6048 Saturday afternoon. We could not get the WIFI to connect to the APP as the setup reported the WIFI module on the LVX6048 could not communicate with the inverter. All else was working well.--FYI--One annoying problem on these others have reported here is the...
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    HIQ batteries from eBay store--With UPDATES*

    Bought 4 pcs from HIQ Battery Ebay store. $1098.16 delivered to my door. Shipped from UPS which was very slow because of the holiday season. Here is my opinion on them so far: PRO: 1. Light weight-- ~21lbs each 2. Small for the 100Ah 12V design 3. Very nice gold plated terminals that come...
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    Father-Son Solar Golf-cart build

    Been thinking about this since my son was captivated by Will's video. Last night I bought a 2008 Yamaha YDRE (Drive?) cart in good shape but the batteries are bulged and need of replacement for $1500. Yamaha is a 4s 12V battery configuration to make 48V. Then I ordered 4 of these HiQ 12V...
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    Looking for a LVX6048 for my dad as a Christmas gift

    Anyone have one they can separate from? I've been looking and on the Watts24/7 waitlist but can't seem to find one in the US. I know I can take my chances and order from TW but would rather not deal with them as I've heard the horror stories. Thanks Dennis in Maryland
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    Charging 0 Volt 26650 Cells

    Bought a bunch of 26650 LiFePO4 packs for my son and I to play with. $75 shipping included for 135 (3.3Ah) cells in low voltage packs so I figured what the heck. 3 different manufactures of cells but in general ~80 have voltages between 2.0-3.3V-- all successfully charged to 3.6V at 250mA...
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    26650 help ID Vendor or Datasheet

    bought these cheap $25 shipped for 45 Cells packs of 15(5s3p) trying to find the Manufacture or a datasheet.
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    Anyone Brave enough to BUY 320Ah cells from EBAY?

    If so speak up. 4 pcs 320Ah? cells for $410 delivered is too good to be true and cheaper than Ali express it seems. If you did and got scammed let us know if you got our money back from fleabay. sellers are like SRi Lanka and Israel but have decent feedback but no prior sales of cells.
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    125V RMS GRID Voltage?

    Cabin in the woods. Measured mine and 2 of my neighbors voltage using (2 different Fluke meters) at same +125V AC! I realize its transformer at the street but I have 1200ft of buried line between me and the transformer and I'm still getting such a High voltage. Problems: 1. My older SONY...
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    Helping Dad power 4 freezers during outages

    Dad lives alone and in a rural part of Ohio and has frequent power outages that last 5-7 days. I got him 20 used 250W panels from Santan solar. I gave him my MPPSolar 1012LV all in one and he connected it to 3 panels in parallel. Built him a 4s2p stack of 280Ah eve cells so 12V 560Ah with...
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    US based new/used battery Suppliers?

    I enjoy seeing what's available on the market. Anyone know any others? https://batteryhookup.com/ https://www.18650batterystore.com/
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    4s JBD 100Amp setting to maximize surge current?

    Have a 4s JBD Running my ~250W air pump. Recently had to change inverters and now the surge at startup is causing the inverter to fault. I have tracked it down tot he BMS because if I move my GND cable to the battery itself it works fine and the Older inverter worked fine for years. Now I've...
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    Issues with Off-Grid pump house JBD/MPP-Solar/Make Sky Blue

    Went out to check on my Off grid Air Pump house in the mountains and found the pond had completely frozen over and the pump was not running! Opened the Box to see the 4s2P stack of EVE 280Ah cells with JBD 100A BMS was OFF and so were the 60A Make Sky Blue charger (1s3p of 245W panels) and the...
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    Best Containers for 4 or 8pcs EVE 280AH cells

    was building a 4 cell 12V and a 8 cell 12V pack for my Dad's needs was wondering if anyone has found some novel or genius solutions for a container? I did a 8 cell pack for my needs and used a brown ammo crate but it was just an OK fit for the price. I'm trying to find the pictures but got to...
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    Making your own BMS or Solar/inverter controller (Code included)

    So I was using an Arduino for some quick measurements of a battery string. I switched it to a Digispark ATTiny85 beacuse it plugs directly into a USB port for power which makes fun and portable. I was using it to build a ON/OFF relay for battery switch or Inverter. it was simple and fun and...
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    MorningStar Tristar TS-60 and TS-M

    60 Amp PWM controller in good shape with remote able TS-M front screen. $120 shipped CONUS
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    48V 1KW power supplies

    I have 2 pcs of the RSP-1000-48 adjustable power supplies. They are new but no original boxes. Would be a great setup to run your 48V instead of a battery for testing or make a 48V battery charger. https://www.digikey.com/product-detail/en/mean-well-usa-inc/RSP-1000-48/1866-4219-ND/7706283 I...
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    Suggestion on how to fix General discussion threads off topic.

    Such a great place but it seems like General Discussion is flooded with question which belong in other topic areas. Maybe when creating a new thread in General Discussion they can check a box about the general idea of the topic? Maybe that could help guide it to the correct area?
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    Cheap BYD battery by the numbers. Stay away.

    All the re sellers keep lowering the ratings of these packs to avoid returns. Originally rated at 4.5kWh now they have them 3kWh!!!!! These packs have been used and abused. 8 cell at 3.2V each and 220Ah cell rating = 5.632kWh! Most folks are gettiing 3-3.5kWh which is like less than 53-65%...
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    Cost per Wh thread? Watch shipping costs!

    Is there an active cost/ deals thread? For new cells? Was trying to do the math and save myself some cash and I noticed if you buy 8pcs 105Ah cells its same shipping cost 8 pcs x 3.2V x 105Ah = $274 PLUS $171 ship = $445 8*3.2*105 = 2688Wh 445/2688 = .16555 $/Wh or $165/kWh...
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    Challenge: smallest Iron Phosphate replacement for Milspec 6T NCA

    Currently using a 6T milspec battery that measures roughly 9.5"x10.0"x10.5" at 42lbs. Its a ~126Ah 24V ( 29.4Volt 7s NCA) with 3.2kW output. (Although when charged with mil- Vehicle to 28.8V is more like 2.7kW) It has a built in heater! Cost isn't a concern but SWAP ( Size Weight and Power)...
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    Mpp 800W 12V settings issues

    Hopefully Ian is around or someone else can answer this question I set my 01 to solar. My 12 setting to 12.8V. And 13 is default 13.5 V My air pump is drawing 235W according to screen. Battery is down at 11.2 V from fully charged 13.5 at start. Pump is still running even though panels...
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    Dutchman 12V 100AH Lithuim $546 free shipping

    Anyone want to be the first to jump on this? https://www.ebay.com/itm/12v-100ah-lithium-battery-Lifepo4-Free-Fed-Ex-Ground-Shipping-From-San-Diego/254417567102?hash=item3b3c77fd7e:g:xVsAAOSwHwRdyMbm
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    Off Grid LED Lighting

    Not sure if this belongs in Tiny cabin section. Looking for lighting Ideas that are for a 12x12 shed ut don't want a bunch of energy storage t run all night? AC or DC? where to get them? thanks
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    Top 3 mistakes?

    Everyone makes mistakes when starting out. here are my top 3 so far. Total cost of learning = $265 +135 +30 = $430. not too bad! 1. Morningstar Tristar TS-60 PWM controller Thought it was an MPPT version. Turns out its not very useful for 12V battery charging from a anything that isn't...
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    Do setting persist after Power loss? and Rated Solar Questions

    Recently bought this: https://www.ebay.com/itm/PIP-812LV-800W-12V-120Vac-Solar-Inverter-40A-MPPT-charger-Gen-Util-20A-RV/254345565459?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 I was wondering after reading manual and watching the Videos: 1. If ALL power is dropped ( no grid...
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    El Cheapo Solar Aerator Pump

    Well here it is. My first solar project on the cheap. My goal here was to run this air pump motor on solar not battery. I used relays and solar controller to make my own "BMS". The 24V relays have the coils in series. This is because the coils on relays turn on at about half their voltage so...
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    AC Coupling for off grid applications

    Hello this is my first post and I'm glad to found a place of like minded folks! I recently heard an application from enphase on how to use their grid tie micro inverters on an off grid system. So the idea is this: use a small battery ( or solar powered converter) and small inverter to make a...
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