New to solar power which MPPT do i buy?

[superhuman]

Hey guys am new to the solar scene and i have decided to get solar power in my RV 40ft long.
I currently got 235watt panels a total of 7panels for $1300 bucks. (let me know if you think this is a good deal or i should skip out on this)
Now my big issue is which mppt controller do i buy. I have never done anything like this but it seems to so easy hehe.
I am looking into morning star and outback. Midnight seems really good for the price and the power but i cant find much info on this, hell i can barely find ANY info on any of this stuff. I am willing to pay up to $650 for a good mppt controller.

Am gona need some help setting this thing up if anyone can direct me to what am going to need to buy such as fuses and which cords,wires,extra stuff am gona need. Thanks guys

[Naptown]

This is an RV
Are you planning to keep the voltage @ 12V or can you increase the voltage of the system for the 120V ac side of the equation.

[superhuman]

Yea for sure 120 and i am willing to go up to 48 volts. Minimun 24volts. This will also be completly seperate from the RV everything is seperate part of the rv has a open space where all this stuff will go.

[Naptown]

In your case I would probably suggest splitting up the systems into 2 systems. A 12V system to run the 12v stuff already in the RV and a higher volt system to power the AC loads.
Is there a Generator in the RV that needs to be considered and how is the RV set up.

[superhuman]

I would not want to split it in 2 systems i only want 1 i would just use the inverter to run whatever i need in my RV of this. I do have a generator and i dont like the noise which is why i just want to put solar panels on the top of the rv lol.

[Naptown]

I have had good success with Morningstar but all are good.
If you set up at 48V you will need at least a 45A CC.
Now you may not be able to use all 7 panels Most likely 6 unless you go to the Xantrex 600-48 charge controller or 2 charge controllers.
So what are the specs on the panels

[Sunking]

I do have a generator and i dont like the noise which is why i just want to put solar panels on the top of the rv lol.

Solar is not going to eliminate the generator, just make you more dependent on it.

For an RV you should stay with 12 volts. Just about all lighting, appliances, and gizmos in an RV use 12 volts. At 240 watts input the minimum controller size is 20 amps in either PWM or MPPT.

[Sunking]

I currently got 235watt panels a total of 7panels for $1300 bucks.

OK make this clear for me. Do you have 7 panels totaling 235 watts? Or 7 235 watt panels for a total of 1645 watts.

[superhuman]

Yes 7 panels with a total over 1600 watts.

[superhuman]

I would really hate to get 2 controllers i see the outback flexmax has 80a, and the panel info is 7 230 watt & panel is rated ocv 36.8 vmp 30.0 scI 8.34 Imp 7.67

[superhuman]

Would this one be enough for my 7 panels? http://www.altestore.com/store/Charg...troller/p6084/

[Sunking]

Well with 1600 watts of panel, if you want a single system will require a 24 volt battery system and a 80 amp MPPT controller. 80 amp MPPT controllers have the following power input limitations vs battery voltage.

1000 watts @ 12 volts
2000 watts @ 24 volts
4000 watts @ 48 volts.

If you want to operate at 12 volts will require two 80 amp MPPT controllers with 4 panels on one controller, and 3 on the other.

There is one other catch with that much wattage with respect to batteries. In order not to blow up a battery will require 12.8 Kwh battery. That battery weighs in at around 700 pounds and takes up quite a bit of space. Weight and space come at great expense in an RV.

[Mike90250]

And my question is, what are you going to power with this ? A microwave for popcorn in the evenings, or a couple LED lights ?? Once you establish your LOADS, then we can proceed to design the rest of the system.

[superhuman]

What do you mean 700 pounds of battery? do you mean around 10 batteries etc thats not really a problem? about the load, it would be 2 desktop 2 40' leds just everything for a mobile home/rv. I currently have a 5000watt/10kwatt peak inverter.

[superhuman]

Ive also been thinking because i dont want to run 2 diffrent controllers why does it matter if i want to run at 12v? because if i have 7 panels i cant i need atleast 24v and anything that i want to use can just be used via my inverter(10k) as long as it plugs, correct?