Series cart rebuild for mom..

[WC53]

Well my mom’s cart is dead, lol, that is good and bad, the world is safer :) She is 89 and uses the cart to drive around with friends and visit neighbors. Probably 10-15 miles a day. A few small hills. Cart has a bit bigger tires and goes across fields sometimes. Street legal cart.

Series cart with coils. I smell smoke... and batteries are old. My though is

1) rebuild it with an alltrax conversion talked about on here.

2) Is there a way to add regen breaking? She can get a bit scary going down hills? Having the ability to slow her down before hitting the break would be good.

3) As to batteries, lithium? I am pretty experienced working with batteries, just not the loads a cart would put on them for continuous ratings. What sustained amp draws are needed?

Reliability for her is important.

Thank you for any guidance, and my first post!

[emoney]

Definitely go Lithium. It will probably save you money in the long range. If nothing else, the no maintenance aspect is worth quite a bit. A 48v cart normally driving draws about 50-65 amps continuous I would imagine. Now, there will be tons of people jump in with "But my Alltrax Controller is 600 amps", so there's exceptions to every rule, but there's a big difference between all the time and on that one occasion the moons align. In a hilly terrain, I'd imagine the same cart would draw about 80 amps. If it's a situation that she can park and charge the cart every day, after those 10-15 mile trips, then a 100Ah pack would be great. As an example, bigbattery.com sells a 48v pack that is somewhere around 30-35 Ah for golfcarts. Not sure about that going 15 miles, but I'm sure they would tell you what they think.

[scottyb]

I'm not sure Mom needs a 10 yr battery pack at 89 but we can hope she does
What's the UL # on that pack and charge system in this cart for a 89 yr old single woman?

[WC53]

Looking at alltrax 400 and I think it says you can have personalities? So I could have it restricted a bit as long as she doesn’t complain and remember that she complained.

Man those batteries are expensive, have to see if building a pack makes sense or if my the time you pay for shipping, bms, charger, breaker/fuses it starts costing the same. Not enough coffee yet to write out a parts list and do math