271 Ah upgrade
I'm sitting in the camper now on our shakedown voyage with the new 271 Ah LifePo4 battery I built from 4 3.2 cells I bought from China. This is working out so well that I'm seriously considering build...
Forum Discussion
My two cents.
A 24 volt inverter system is nicer. Do not need as big of cable etc. I went with the 12 volt because camper system is 12 volt and I all ready had a GoPower 3000 watt inverter.
One thing to consider in making a battery pack is a BMS (Battery Management System). If you were to ever have your camper in cold weather even if not being used, I would suggest getting a BMS with a low temperature disconnect. BMS is also used in protecting the cells from over charge or under discharge. BMS also keeps the cells balanced (same or close to the same voltage) as they charge and discharge. Just cheap insurance on your investment.
I choose to use aluminum case 190 AH cells. Four required in my 12 volt set up. In making the cell pack, I used motorcycle rubber tubes to cut up and created spacers between the cells and a few six inch hose camps to hold everything together. The total weight is right at 34 pounds. The four cells together are smaller then one 12v AGM battery. The two batteries this replaced where 110 pounds total weight.
The choices are endless in set ups.
I choose to have two circuits coming off the battery. One will use the BMS. This circuit will have the campers 12 volt system to include, the campers lights, TV, refrigerator, fans etc., campers convertor and the solar charging connected to it. This will be a 100amp continuous charge/discharge capable. The second will have a 250amp bus fuse going to a 220AMP Victron battery protect then to a 3000 watt GoPower inverter. If one wanted to use a 1000 watt continuous inverter, you would only really need the BMS circuit.
The GoPower 3000 watt inverter is connected to a second 30amp transfer switch which is wired into the primary 30amp transfer switch with shore power being primary and generator and inverter being secondary. The GoPower inverter powers all 110 volt receptacles. The campers converter is on an on/off switch and usually stays off. The solar handles the charging of the batteries for the most part.
Just a test I ran the A/C on high for an hour and ten minutes with about fifty percent battery left. Check all the wiring transfer switches and parts, nothing got hot, just a five degrees warmer then the surrounding which the outside temp was eighty eight degrees.
https://imgur.com/a/aB2wPiM
A 24 volt inverter system is nicer. Do not need as big of cable etc. I went with the 12 volt because camper system is 12 volt and I all ready had a GoPower 3000 watt inverter.
One thing to consider in making a battery pack is a BMS (Battery Management System). If you were to ever have your camper in cold weather even if not being used, I would suggest getting a BMS with a low temperature disconnect. BMS is also used in protecting the cells from over charge or under discharge. BMS also keeps the cells balanced (same or close to the same voltage) as they charge and discharge. Just cheap insurance on your investment.
I choose to use aluminum case 190 AH cells. Four required in my 12 volt set up. In making the cell pack, I used motorcycle rubber tubes to cut up and created spacers between the cells and a few six inch hose camps to hold everything together. The total weight is right at 34 pounds. The four cells together are smaller then one 12v AGM battery. The two batteries this replaced where 110 pounds total weight.
The choices are endless in set ups.
I choose to have two circuits coming off the battery. One will use the BMS. This circuit will have the campers 12 volt system to include, the campers lights, TV, refrigerator, fans etc., campers convertor and the solar charging connected to it. This will be a 100amp continuous charge/discharge capable. The second will have a 250amp bus fuse going to a 220AMP Victron battery protect then to a 3000 watt GoPower inverter. If one wanted to use a 1000 watt continuous inverter, you would only really need the BMS circuit.
The GoPower 3000 watt inverter is connected to a second 30amp transfer switch which is wired into the primary 30amp transfer switch with shore power being primary and generator and inverter being secondary. The GoPower inverter powers all 110 volt receptacles. The campers converter is on an on/off switch and usually stays off. The solar handles the charging of the batteries for the most part.
Just a test I ran the A/C on high for an hour and ten minutes with about fifty percent battery left. Check all the wiring transfer switches and parts, nothing got hot, just a five degrees warmer then the surrounding which the outside temp was eighty eight degrees.
https://imgur.com/a/aB2wPiM
