idiomatically
New member
- Joined
- Jul 11, 2017
- Messages
- 6
Firstly I'd like to thank all the people that have contributed to the site, without the shared knowledge and the openness of others I would not have been able to have a crack at this project. It was my first and I consider myself still very very green. A special shout out to Geek for putting up my private messages and his support.
A bit about the box;
42 cells(LG MJ1 3500mAh) in 7s6p w/ BMS for 24volts 21AH
10-30v MPPT Solar / DC charge controller
600w 24v pure sine wave inverter
24v intelligent shunt
24v to 12v buck converter
12v gauge
dual 5v 2.1amp USB
12v Engel and Cigerette sockets
240v outlet
All individually switched and fused.
I spend what little free time I have camping, so our main offroad power comes from the dual battery 220AH AGM setup in our 4wd and camp trailer with a 200w panel. However this isn't portable and often we have people with us that need some power so I wanted something that I could move around the camp and also use to power the hot water shower pump as well as charge my sons laptop so he might actually come with us.
I took a few months to build it as I had a lot to learn, parts to source and I built and tested my spot welder on some dead cells.
This is an old 330 cracking amps car battery, using a high amp motorcycle solenoid, momentary switch and pure copper nails. I found this worked very well, the cells in the picture were my dead testing cells. It took me a while to dial it in and find actual pure copper nails but the end result now is perfect with the nickel I got from the UK.
I needed a way to charge / test the boxes step up solar / dc charge controller so I stole an old xbox 360 power supply we had in the cupboard and modified it for my purpose so at home this is what I am using to charge the battery.
I now have 600 old laptop batteries in my shed so I am planning on a v2 in a bigger box to accommodatethe lower capacity cells, and will start plans for a power all setup too. This was a nice introduction to the theories and a solid learning exercise. Thanks again everyone.
A bit about the box;
42 cells(LG MJ1 3500mAh) in 7s6p w/ BMS for 24volts 21AH
10-30v MPPT Solar / DC charge controller
600w 24v pure sine wave inverter
24v intelligent shunt
24v to 12v buck converter
12v gauge
dual 5v 2.1amp USB
12v Engel and Cigerette sockets
240v outlet
All individually switched and fused.
I spend what little free time I have camping, so our main offroad power comes from the dual battery 220AH AGM setup in our 4wd and camp trailer with a 200w panel. However this isn't portable and often we have people with us that need some power so I wanted something that I could move around the camp and also use to power the hot water shower pump as well as charge my sons laptop so he might actually come with us.
I took a few months to build it as I had a lot to learn, parts to source and I built and tested my spot welder on some dead cells.
This is an old 330 cracking amps car battery, using a high amp motorcycle solenoid, momentary switch and pure copper nails. I found this worked very well, the cells in the picture were my dead testing cells. It took me a while to dial it in and find actual pure copper nails but the end result now is perfect with the nickel I got from the UK.
I needed a way to charge / test the boxes step up solar / dc charge controller so I stole an old xbox 360 power supply we had in the cupboard and modified it for my purpose so at home this is what I am using to charge the battery.
I now have 600 old laptop batteries in my shed so I am planning on a v2 in a bigger box to accommodatethe lower capacity cells, and will start plans for a power all setup too. This was a nice introduction to the theories and a solid learning exercise. Thanks again everyone.