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how big is the yellowtop? I went to the optima website and their biggest yellowtop was 55ah. From my own experience with a 75 ah agm battery, I never got more than a day of 12 volt refrigerator use out of it. Once the battery voltage goes below 12 volts, the fridge starts misbehaving. With the...

it should work, but there are some AC battery chargers that i encounter that don't work when plugged into an modified wave inverter, they might work with a more expensive pure sine inverter. I would test it before going on the trip. You can also just connect to a 12 volt cigarette adapter and...

I just use 10 gauge zip wire (its the red black wire) and for connectors I use the xt60 (easy to solder to the wires and can handle up to 60 amps) the xt60 cost about 8 dollars for 10 pairs, you cant hook them up wrong and are easy to connect and disconnect. Been using them for 2 years and...

any agm battery should be able to jump it, the bigger the better. The little jump pack is just a 17ah agm battery. I have a small 28ah agm battery that I have actually used as a start battery on my astrovan, used it for several days with no problem. Even if for some reason it wont jump it...

I had similar problems with a 145 ah agm battery. Which would be floating at noon, but at night time it didnt take long to get down to 12.3 volts or lower. Eventually I replaced it with a kinitek khc2000 102ah agm, this battery after all night use reads 12.6 volts. The battery might have been...

One thing that is often overlook is how much amp hour you can get out of your battery. For instance a 100 amp hour battery isnt really what you will get out of it. You never want to go below 50 percent of your battery rating. So for a 100 amp hour battery, you can actually only use 50 amps out...

danfoss compressor 12 volt fridges consume about 25 amps of power during a 24 hour period when set to 40 degrees. I use to keep my fridge edgestar fp430 in the back of my van where the temperature was over 90 degrees. I measured the consumption using a 12 volt wattmeter. I use to run it 24/7...

the ecoworthy 20 amp mppt is a reliable unit. I bought one when they first came out about 3 years ago. It has been working nonstop 24/7 since I hooked it up. The only problem I seen is the same one mention above about the absorb mode not having a timer. As soon as the battery voltage reads...

I been using my ecoworthy 20 amp mppt 24/7 for almost 3 years, it is a real mppt not like some of the fake chinese mppt and has proven reliable for me. For the 102 dollars i paid it was a bargain. But for mppt make sure your panel is a high voltage panel, something like 30 volts or higher. Mppt...

as far as battery placement, I have a kinetik khc2000 agm battery (102 ah). Its installed inside my astrovan in the back. Before that I had a 75 ah and a 145 ah agm batteries. Never had any problem with them in the 4 years I had agm batteries and I sleep in the back. You can always put a vent...

the 12 volt freezer alone will drain most batteries within 1 day, unless its well insulated. Solar wont keep up with it. Also it will heat up your van. You might want to build some sort of vent to get rid of the heat from the freezer. I got rid of my 12 volt fridge because of the heat it produce...

For keeping cool I found out nothing beats foam insulation. The entire rear of my 1986 astrovan is covered in foam insulation, I used the rtech 1/2" 4x8 foot sheets they sell at home depot (about 8 dollars). I removed the old roof insulation which was thin fiberglass material and hot glued the...

12 gauge is ok for the controller to the battery if the distance is not too far. Another inexpensive connector (10 sets for less then 10 dollars) that is available is the xt60, thats all I use, it can handle up to 60 amps and easy to connect/disconnect. You need to solder the wire to it but...

the engle 45 looks liked the edgestar fp430 i use to have. When set to 40 degrees and in excellent weather, I use to run it 24/7 for months at a time off a 120 watt panel and a 75 ah agm battery. When hooked up to a dc wattmeter, the fridge used about 26 amps over a 24 hour period. The bigger...

I bought a small astrovan for 700 dollars and had it for 3 years, I converted it into a small rv but without all the amenities. Astrovan is very small but has lot of space in the back, easy to park everywhere and doesnt attract too much attention, area I live even the small RVs are always...

its safe, solar charge controller wont be damage by battery or alternator. If the controller sees a full battery it goes into float mode. The battery is more powerful than either the alternator or solar charge controller, it is capable of releasing more amps in one second than any charging...

12 volt fridges use about 25 amps in a 24 hour period when set to 40 degrees. I measured this on my edgestar fp430 with a dc wattmeter, most 12 volt fridges use the danfoss compressor so they will have similar power use. A 100 ah battery will only last you 2 days before you have to charge it...

if you are only reading 12.3 volts on your batteries, they are getting worned. After charging all day from driving etc, they should read 12.7 at least. My 102 ah kinetik agm house battery reads 12.9 after charging all day. Its a 3 year old battery but still reads what it read when brand new...

leds dont use much power, The ones I have on my van (supernight) uses about 2 amps and light up the rear of my van. tablets use about 2 amps or less and speaker also about 1 amps. It depends how long each night you will run your lights etc. I myself have 2 agm batteries that I use, a kinetik...

you should be able to do it, The portable 12 volt jump packs can be charged that way, most are 18 ah agm batteries. it has a male adapter to male adapter wire, that you plug in from the cigarette plug on vehicle to 12 volt plug on the jump pack. Your aux battery is just a larger jump pack. You...