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I have (4) CALB 3.2V 200AH cells connected to make a 12.8V battery, Terminal connections are with copper pipe I flattened and drilled. The cables to the inverter are 1/0 welding wire. During a 120 AH event I noticed a burning smell and then smoke coming from one of the terminals. The wires...

I am helping a good friend diagnose why his 13S Ebike battery will not take a full charge. There is a 14 Pin connector (shown in the photo) I assumed was for a BMS that was not installed, then I saw the PCB inside the battery which looks like it could be a BMS but it could also be a Balance...

Greetings. I bought a 48 V Panasonic battery from Battery Hookup thinking to carry it as a backup for my Lectric Ebike which also has a 48 V battery. The Panasonic is well built and all I need to do is add a 13S BMS which Battery Hookup provided instructions for. So my quandry is...

Condition: (2) 12V 3S 90AH BMW batteries wired as 2P (I want to double the AH) Q. Do I need a BMS for each battery, or will one 3S 180 AMP Daly BMS be OK? Q. The batteries came with a 9 wire BMS outlet. Four of the wires test with various voltages, while the remaining five appear to be...

I need to replace the battery in my Dewalt 14.4 v drill and want to convert to lithium. Is there a source for the box, connectors, 18650 batteries y’all can recommend?

Concerned about my new CATL cells. 12.8 volts and 400 AH. Ran the camper Microwave for 3 minutes pulling 170 Amps. Voltage read 13.1 prior to the run but dropped to 11.9 during. Went back to 13.1 after the run. Is this normal? I thought Lifepo batteries would see less of a drop.

My CATL batteries have a max charge rate of 1C according to the specs. How do I equate to setting up the charge profile for my Magnum Inverter/Charger. Magnum states the charge rate should be 14.6V at 100%. Will that fry my batteries? (4) 3.2 v 200 AH cells X 2.

I contacted Magnum for their guidance on LifePo charging and they sent the parameters in the attached image. Does this sound correct?

Not sure if the BMS IS WORKING or that I installed correctly. Batteries are 13.9 v with cells ranging from 3.41 to 3.44. Checked with volt meter. Does thus sound right?

Ok. I am a total noob...but learning. I received two Daly 150 amp BMS today. I have two batteries. I get that the Blue wire goes to the negative terminal of the battery and the small red wires go to 1234 cell positive. Where does the remaining large black wire go? The diagram says Load...

I am finishing the installation of my CATL cells. Two 12.8 v batteries paralleled for double the AH. There will be a BMS for each battery so is it necessary to use the LVDO that is programmable with my Magnum inverter?

These cells came in at 2.83 volts per cell. I put them on charge this morning using the AGM setting on my Magnum inverter charger. In less than one hour the battery is at full charge. Hopefully that is a good sign. Now my question. The terminals are so small and week I am worried they won't...

Just received the shipment. Boxes were beat up badly but the cells all look good. Sadly they are all low voltage...from 2.83 to 2.94. Is this an indication of a problem, or is it typical? Busbars are included but they are pretty thin so I am pounding out some copper pipe. What about the...

My DIY battery consists of (8) 3.2V 200AH CATL cells which I will connect in series/parallel to make a 12.8V 400AH battery. So my newbie question is "do I buy (1) 8S BMS, or (2) 4S BMS? There are not many 8S 12V BMS for sale but there are a lot of the 4S 12V for sale. I also will need a large...

My (8) CATL cells finally shipped and will arrive March 4 according to Fedex. They are coming minus bus bars so I need to make or buy some. Is there a standard bolt size and thread for these? 3/8, 5/16, etc. Also my (2) 12V LIFEPO4 SMART BMS W/ LOW TEMP CUTOFF from Battery Source will be...

Deligreen employees have just been allowed to return to work but their Chinese shipper is still not operating so my order of (8) CATL 3.2V 200 AH cells is further delayed. The sales rep at Deligreen has been very communicative through Alibaba messenger but her hands are tied. I just wonder how...

My magnum hybrid inverter allows me to program the low voltage drop out. It does not say anything about battery life remaining. If I am installing 2, 12 V 200 amp lifepo batteries where would be a good level for the low voltage drop out?

This is a follow on to my last post about EV to house. In the current setup my 5.5KW of Solar Edge panels will shut down if they don't see 240V from the grid. I know there must be a widget to trick the panels and Inverter into staying on even with a grid shutdown. I'm thinking a transfer...

This may seem a bit way out there but with some Electric vehicles offering a reverse power feature where one can provide power to their house...buy a wrecked EV for pennies on the dollar and just hide it in the driveway, garage, or purpose built shed. Keep it charged with PV (currently at 5.5KW...

I am on my way to my first DIY battery build. I have ordered 8 3.2 V 200 amp power cells and two- BMS units from the company recommended by Will. I will install these batteries in my airstream travel trailer in a side compartment that is close to the inverter charger and affords a good deal of...

First let me say that this forum and especially Will's videos have been a game changer for me. I have ordered 4 CATL 3.2V 200ah batteries and a 12V LIFEPO4 SMART BMS W/ LOW TEMP CUTOFF . My aim is to place everything in a case with top terminals. The only cases I have found are on Ebay for...

I am a noob when it comes to Lithium batteries but am very experienced with Solar, AGM batteries, inverters, etc. I am committed to my first DIY battery and after much research and shopping two names keep popping up. CATL and CALB. CATL has gotten good press due to contracts with Tesla, and...

I have (2) three year old Crown 6V AGMs connected as 12V, and don't want to just discard them. Can I safely string a Battleborn or similar Lithium onto the Crowns? If so which battery should be first in the line? I read that Goal Zero has a connector for doing this but you have to buy their...