LVLAaron
New Member
- Joined
- Jul 16, 2021
- Messages
- 219
I have a brand new 15 foot camper. Came with 2 lead batteries. I build a lifepo4 pack and put it in the rear compartment of the camper. I ran 2GA welding wire from the front of the camper where the main 100amp breaker is located and all the positive leads tie together for batteries, inverters, chargers, etc.
The factory "converter" would only charge maybe 10amps, usually less, not awesome.
So I decided to put my AIMS 75amp charger in (https://www.aimscorp.net/ac-convert...art-charger-75-amps-listed-to-ul-458-csa.html) This charger works awesome on my bench. I charge my packs with a 4 foot lead of 2GA welding wire with an anderson power pole on the end. When charging the BMS shows 75 amps going in. Great.
I put the AIMS unit in my camper. 120v plug into a circuit that only operates on shore power.
I attached the output of the AIMS unit into the factory inverter lugs. (It has 2x pos and 2x neg lugs for 2ga wire)
So from the AIMS to the battery, there is a solid run of 2GA wire, 16-18 feet in total lenth. All of the connections I made are solid, hydraulic crimped with solid copper connectors. At the battery end of the new cable run, I have a Victron Shunt, and a Blue Sea 150amp fuse, but again, very solid connections.
The only connection that might be questionable now that I think about it, is where the main negative from my aftermarket run is bolted to the factory 2ga wire (factory connector has a huge binding post hole, and the binding post it's connected to is 1/4 inch maybe).
On to my problem.
The battery is only charging at ~34 amps. This unit has a dial that adjusts output, if I turn it all the way down it outputs 20 amps, and that is what the battery will charge at. On max it's the 34 mentioned amps.
As I am testing this, there are no other loads on the system. Verified by powering off the aims unit and checking the BMS.
Should I expect these kinds of losses over this distance?
I really want maximum charge speed, so when I do need to charge it happens as quickly as possible. I could move the AIMS unit closer, but it would be a hassle to wire a new mains circuit.
The factory "converter" would only charge maybe 10amps, usually less, not awesome.
So I decided to put my AIMS 75amp charger in (https://www.aimscorp.net/ac-convert...art-charger-75-amps-listed-to-ul-458-csa.html) This charger works awesome on my bench. I charge my packs with a 4 foot lead of 2GA welding wire with an anderson power pole on the end. When charging the BMS shows 75 amps going in. Great.
I put the AIMS unit in my camper. 120v plug into a circuit that only operates on shore power.
I attached the output of the AIMS unit into the factory inverter lugs. (It has 2x pos and 2x neg lugs for 2ga wire)
So from the AIMS to the battery, there is a solid run of 2GA wire, 16-18 feet in total lenth. All of the connections I made are solid, hydraulic crimped with solid copper connectors. At the battery end of the new cable run, I have a Victron Shunt, and a Blue Sea 150amp fuse, but again, very solid connections.
The only connection that might be questionable now that I think about it, is where the main negative from my aftermarket run is bolted to the factory 2ga wire (factory connector has a huge binding post hole, and the binding post it's connected to is 1/4 inch maybe).
On to my problem.
The battery is only charging at ~34 amps. This unit has a dial that adjusts output, if I turn it all the way down it outputs 20 amps, and that is what the battery will charge at. On max it's the 34 mentioned amps.
As I am testing this, there are no other loads on the system. Verified by powering off the aims unit and checking the BMS.
Should I expect these kinds of losses over this distance?
I really want maximum charge speed, so when I do need to charge it happens as quickly as possible. I could move the AIMS unit closer, but it would be a hassle to wire a new mains circuit.