Newbie advice

[HITEKREDNEK]

Well sh*t fire Sunking, what do suggest, I thought I had a small understanding about solar power & power inverters but now I'm just lost.

[Sunking]

Thank you Sunking, so the fridge is a no go obviously, not gona drop that kind of money every couple yrs and the weight, so should I think about jumping up to a 400 watt sys and 4 250ah batteries? If so what is some name brands to start looking for and where to buy them? Thanks again.

Last thing you want to do is parallel batteries. There is no reason to do that nor is there any reason to run 12 volts. You gotta get out of that 12 volt box you are trapped in. A 12 volt 250 AH if you could find one is going to weigh 180 pounds x 4 = 720 pounds. and cost more than the 12 volt 800 AH battery. 4-12 volt 250 AH batteries in parallel is 1000 AH. That would take 1500 watt sof panels and two very expensive charge controllers.

Let's try a different approach and start with 400 watts of panels configured at 12 and 24 volts.Your two options are:

At 12 volt battery requires an expensive 35 Amp MPPT Controller, and a pair of 6-volt 225 AH golf cart batteries like a pair of Trojan T-105's wired in series
At 24 volt battery requires a less expensive 15 Amp MPPT Controller and a pair of 12 volt 115 AH batteries like Trojan 27MTH wired in series.

Both batteries weigh about the same 65 pounds each and have the exact same amount of capacity. With 400 watts of panels on a Trailer, you cannot support anymore battery that, and either one can handle up to a 1000 watt Inverter. The difference is what it will cost. 24 volt will be less expensive because 24 volt uses a smaller controller and smaller wire and less hardware.

[HITEKREDNEK]

Thank you Sunking, so the fridge is a no go obviously, not gona drop that kind of money every couple yrs and the weight, so should I think about jumping up to a 400 watt sys and 4 250ah batteries? If so what is some name brands to start looking for and where to buy them? Thanks again.

[Sunking]

300 watt panels on a RV or Trailer is very limited and can only support a 12 volt 200 AH battery if you do not abise it like trying to run a fridge. To run a Fridge you need around 1000 watts of panels, 80 amp controller, and a 12 volt 800 AH, 500 pound $1400 battery you replace every couple of years.

[HITEKREDNEK]

Sun eagle, thank you for the info, would it be safe and gain me more power if I was to have 2-3 of them 250 ah 12v batteries in a bank and would the 300 watts of panels be able to charge them back up?

[SunEagle]

300 watts of solar panels with a 25amp MPPT charger controller will be able to support a 12v 250Ah battery system. That battery can safely produce about 750Wh a day. (250Ah x 12v x .25 = 750wh).

Now to recharge that battery system your panels will have to generate full power for about 3 hours.

Not a big system but it will keep the cell phone charged and a couple of other small wattage loads.

Forget about wiring 12volt batteries together in parallel. You want your system to be composed of 2 x 6v 225 to 250Ah batteries.

[HITEKREDNEK]

I should had also included that the 12v solar power will not be connected to the campers current 110 volt outlets, I'll run just 2-4 outlets straight off of the power inverter. Thanks again.

[HITEKREDNEK]

Newbie to the forum & to solar power, I've got a old 30' camper that I've converted to a hillbilly toy hauler. It does have your standard 30 amp 110 volt shore power hook up, but I'm wanting to put a couple solar panels on the roof to hook up to a battery bank then to a 1500 watt power inverter to run basic 110 volt stuff fan, phone charger and possible a small dorm size fridge. So my question to you experts is without knowing really what my usage will be would 200-300 watt solar panel and a battery bank of 3-4 12v batteries fit the bill.
Thanks in advance