Intro Duck Shen

Doc3G

Member
Joined
Apr 18, 2021
Messages
56
Hiya, heard about the forum from the Kweld NA Facebook group. Doc3G because I'm a medical student (and hence, will one day be a doctor if I don't blow myself up with lithium batteries first) and 3G for the 3rd Generation 4runner, the greatest SUV of all time. I started tinkering with electrons when I began designing an enhanced electrical system to carry the load for my off-road lights. Somewhere along the way, I got sidetracked into DIY lithium batteries and now have the goal to build a 48v pack for my golf cart that currently has 6 lead-acid batteries. If I survive that endeavor, my next goal will be to add some solar to the house and a powerwall.
 

floydR

Well-known member
Joined
Aug 23, 2017
Messages
1,148
Welcome Doc3g
lots of ways to make or if compartment is big enough just drop in a 48v lithium battery pack.
ajw22 I think they are 8v batteries, not often seen, besides the ones I have seen at sam's club I don't think I have ever seen any.
later floyd
 

Doc3G

Member
Joined
Apr 18, 2021
Messages
56
Welcome Doc3g
lots of ways to make or if compartment is big enough just drop in a 48v lithium battery pack.
ajw22 I think they are 8v batteries, not often seen, besides the ones I have seen at sam's club I don't think I have ever seen any.
later floyd

Yep, they are Continental 8 volts.

I had considered dropping a 48v in there if I found the right deal. The sticking point seems to be the BMS. I can get a new 48v battery from someplace like big battery for ~$650 (~$350 per kWh). I know I should be able to DIY something for under $200 per kWh and maybe help the environment by DIY'ing a used battery but when I start looking at BMS's it seems that anything reasonable that can handle a 200A draw is $250-$500 for the BMS alone. One of the main reasons I joined was because I wanted to learn more about what's available in the BMS arena and if an affordable solution exists for a DIY Golf Cart battery or if it's a no-brainer to just get an off-the-shelf unit.
 

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