Barkers Random Projects
New member
- Joined
- Mar 26, 2020
- Messages
- 9
I ordered a ton of modem batteries from battery hookup, and I'm finally seeing the light at the end of the tunnel with getting them all tested for their capacity.
I'm planning on building two 14s80p batteries (I may combine each pack so they act like 14s160p) - regardless, I'm trying to calculate the bus bar size.
I have a PIP3048 inverter, so I'm hoping to draw a max of 3000w from the pack.
My calculation for the amps needed are as follows:
PIP 3048 3000w
Efficiency 92%
Each bank lowest voltage 3v = 42v for the entire battery
Total watts (factoring in the efficiency of the inverter if it is outputting 3000w)
3000*((1-.93)+1) = 3240w
3240w/ 42v = 77 amps
From wire charts I've seen a safe gauge of wire for 77 amps of power would be about 4-3ga
Do my bus bars need to be that thick? Or do I attach the heavy gauge wire to the top most positive/negative side of the battery? I was thinking of using 6ga solid copper wire, and spinning that on a drill to make it twisted - will that be enough?
Thanks in advance!
I'm planning on building two 14s80p batteries (I may combine each pack so they act like 14s160p) - regardless, I'm trying to calculate the bus bar size.
I have a PIP3048 inverter, so I'm hoping to draw a max of 3000w from the pack.
My calculation for the amps needed are as follows:
PIP 3048 3000w
Efficiency 92%
Each bank lowest voltage 3v = 42v for the entire battery
Total watts (factoring in the efficiency of the inverter if it is outputting 3000w)
3000*((1-.93)+1) = 3240w
3240w/ 42v = 77 amps
From wire charts I've seen a safe gauge of wire for 77 amps of power would be about 4-3ga
Do my bus bars need to be that thick? Or do I attach the heavy gauge wire to the top most positive/negative side of the battery? I was thinking of using 6ga solid copper wire, and spinning that on a drill to make it twisted - will that be enough?
Thanks in advance!