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if its flat on the roof you want the largest panel you can fit for it to get all the amps possible. With my 365 watt LG neon panel flat on the roof I get about 15 amps in the winter and max out at 27 amps in the summer. With a large panel you just need one, with smaller panels you need several...

I was reading the reviews on the beatit and someone mentioned you have to press a button on the side of the cables to activate. I know some of these units have a button that you press when you have a battery that is extremely low voltage (it bypasses the voltage check interlock) I know one...

On lead acid batteries when they are discharged below 11 volts too many times they lose capacity. It happened to me before, even the high performance agm's can only handle a couple of discharges to 0 percent and they lose capacity. When you charge them they are able to reach 14.4 volts quickly...

you need a larger battery, at least one that is deep cycle. Something in the 100ah range. A 12 volt fridge set to 40 degrees comsumes about 20ah per 24 hours, a 100ah lead acid will run it for about 2 days before you have to charge it again. You need to make sure the battery isnt drained below...

If you have shorepower you can use one of the indoor type of AC's. In the hurriedyear website, someone uses one in his sprinter van, he shows what kind of results he gets. For night time use consider a swampcooler. I use a 3 amp 12 volt swampcooler in my van during the day and also at night...

On my van I wired my boost converter through the vehicules cigarette 12 volt receptacle. Thats how I top off my start battery every day. The start battery I'm using is a fullriver high performance 27ah agm. It requires 14.7 volts to fully charge, if I don't top it off after several weeks I start...

I was just pointing out that in a worst case scenario the bluetti can be used to charge a dead start battery. That was the original question. Even if the alligator clips were left on when the battery was cranked over, the bluetti 12 volt socket is fused at about 10 amps, it won't provide more...

One time I had a dead battery on my astrovan, it wouldn't crank over. I had one of those 18ah agm jump starter but it was also dead at around 12 volts, it wouldnt crank over the van, but I left it connected for about 1/2 hour while I decided what I was going to do. I decided to crank the van...

If you plan to keep it as a 16s and charge with solar, I would only use the chargery bms16. You want a bms that will work with any solar controller. The chargery is fully programmable for all the parameters an also has audio/visual alarms and 2 temps sensors. I been using the chargery bms8 for...

On my lifepo4 220ah (not battleborn) it had problems powering my 26L joytutu 12 volt compressor fridge, this fridge is very sensitive to voltage drop when the compresser starts. I moved the low voltage cutoff button on the fridge from low to high which didnt fix the problem. I also tried it with...

If you already have the mobius, they should work for you, I been using mine since last november. All you need is a boost/buck converter to charge them (dc to dc) and also for the output (regulated output). If you plan to charge the mobius with AC power (laptop adapter) then all you need is a...

No such thing as a lithium compatible charge controller, they all measure overall voltage and adjust output as required. I been using my ecoworthy 20a mppt (100 dollar) controller for years to charge my 220ah lifepo4 batterybank and also used it to charge my 312ah li-ion batterybank. The...

for dc to dc charging you need both a boost and buck converter. The boost is to take the input voltage up to 18 volts, and the buck to take it back down to 14.6 volts without losing any amps during the process. You can find the boost/buck converters on ebay, they have different wattages for how...

for something like what you want to do, you need a boost buck converter. Thats how I charge from 12 volt to 12 volt. You need the boost converter to increase the 12 or 14 volt to 18 volt, then you need a buck converter to drop the 18 volt to 14.4 volt or whatever you need. Using the boost/buck...

another method is get a cheap 10 dollar pwm controller on the external panel and just connect that way. Having 2 controllers won't affect anything, they both will feed the battery as needed. That would solve the problem of using different size panels.

Larger panels would be great in the winter and also cloudy areas. I got a LG 365 watt 39x77 to replace my sharp 240 watt 39x64. I seen up to 17 amps charging power in january (max the the 240 put out was about 10 amps). In your situation I would figure a way to install that 3rd panel on...

I use one of these 0-99 volt relays to connect my lifepo4 to charge my li-ion, only when the lifepo4 is being charged by solar (14.1 volts). It could be used in your situation, when the start battery reaches a certain voltage 14.4 volts, it will connect both batteries. Once voltage drops to 12.9...

As long as the 7 pin connector can supply at least 7 amps it should work. Most 12 volt fridge peak at about 7 amps during startup then settle at around 4 amps. But some 12 volt fridges require very stable power to run, too much voltage drop during startup and the compressor will cutout. I was...

Both batteries are oddessys, I would just connect them together. They both will equalized and when you charge them, the one that is full will stop accepting amps while the other one will still keep charging. Thats what I see when I parallel different type of batteries. I connected many different...

I recently replaced the 240 watt panel on my astrovan with a LG 365 watt panel, I had the 240 watt on the roof for about 7 years and never had problems with it. The 365 watt panel seems to be more robust and sturdy then the 240 watt panel. Excellent performance in winter (southern california)...