Hi y'all
My main solar system in my sprinter van will be a 24v system. From there it will feed into my AC system through a big inverter.
However I have a few small loads that run off on 12v.
The 24v system is 2x banks of 320A lifepo4 cells in 8S with a JBD BMS.
But the piggy back system will run just off of 1 bank.
Am I able to run a small 12v load off these batteries?
My idea is that I would be making effectively a 4S 12v system by putting the positive of the first cell and the negative of the 4th cell.
The 12v load is 4A (for a linear actuator bed lift) 2-4x a day for a few minutes each time.
The other 12v load will be for LED strip lighting. I'm not yet sure how many A but I can't imagine it being over 5A.
I'll fuse them appropiately of course.
The proper way would be to get a 10A or so 24v to 12v DC to DC transformer but wondering if I could get away with it for such low loads.
I've been also thinking of wiring a 12v jump start circuit from my 24v system through an anderson plug.
Would the BMS go crazy over it, or would it not sense it (just the voltage/current drop over the first 4 cells) as I'm using the battery positive and negative and not connecting to the BMS.
My starter is 1.7kw so would be less than 0.5C for a few seconds. I was thinking of using a 200A fuse for this 12v jump start plug.
Thank y'all
My main solar system in my sprinter van will be a 24v system. From there it will feed into my AC system through a big inverter.
However I have a few small loads that run off on 12v.
The 24v system is 2x banks of 320A lifepo4 cells in 8S with a JBD BMS.
But the piggy back system will run just off of 1 bank.
Am I able to run a small 12v load off these batteries?
My idea is that I would be making effectively a 4S 12v system by putting the positive of the first cell and the negative of the 4th cell.
The 12v load is 4A (for a linear actuator bed lift) 2-4x a day for a few minutes each time.
The other 12v load will be for LED strip lighting. I'm not yet sure how many A but I can't imagine it being over 5A.
I'll fuse them appropiately of course.
The proper way would be to get a 10A or so 24v to 12v DC to DC transformer but wondering if I could get away with it for such low loads.
I've been also thinking of wiring a 12v jump start circuit from my 24v system through an anderson plug.
Would the BMS go crazy over it, or would it not sense it (just the voltage/current drop over the first 4 cells) as I'm using the battery positive and negative and not connecting to the BMS.
My starter is 1.7kw so would be less than 0.5C for a few seconds. I was thinking of using a 200A fuse for this 12v jump start plug.
Thank y'all