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I will be getting a Li converter so when I plug into shore power I can charge the battery correctly. My MPPT has a setting for charging Li. I always plug in the rig to load up a few days before I go out, so the battery should be 100 charged before I drive away. So since the battery is fully...

Got my LiTime 100amp battery and have been told that I must have a DC to DC charger on my pickup truck in order to charge the Lithium battery in my 5th wheel. My alternator is 180 amp. I realize that the RV converter must be set to Lithium instead of standard battery mode. If mine doesn't...

I am going to install in my RV a 100amp LiTime 12V battery. I already have 200W of solar and a 30amp MPPT charge controller that I am using to charge my current SLA batteries. My MPPT has a setting for charging Lithium. My question is will I hurt my LiTime charging it with the RV's current...

I want to use 2 100W panels in paralle on a 12v system. The HQST panels at 100W have a Vmp at 20.3 each.

Thanks. So I should buy panels that have a high Vmp number based on the same Wattages?

So you are saying that the extra volts goes to more amps for charging?

Since a panel puts out more volts than the battery is rated at ( 18v vs. 12.7v ) does the mppt controller take those extra volts and make it into more amps going into the battery during the charge cycle?

Thanks again. Yes, I have 2 12V lead acid batteries hooked in parallel. Each battery is 67 amphr. I only want to drain them to 50% of capacity. THat's why I used the 67 # in my calculations. Also 2 100W panels are only 40" x 40" and total wt. is 32# Would be using a 30amp mppt controller...

I have at present 2 12V lead Acid at 67amphr each. They came with the rig. I just want to add some amps during the day. I don't live off the grid or anything. So if I'm doing the math right.....67amphr max drawdown /8 = 8.37. 8.37 x13 = 108.8 x .85 = 92.48watts needed on the best possible day.

I am new to this. I have been looking at 100W panels for my RV. In comparing panels for most output, do I take the Wattage and divide it by the VMP #to get max. amp output. If this is right, HQST, NewPowa and Renogy all have different VMP #'s which give me different amp #'s. My goal is to...

This might sound really stupid to some but I have 2 lead acid 12v batteries hooked in parallel. According to the battery manufacturer, Interstate, they each have 64 amp hours. But their chart also says (RC) Mins @ 25 amp = 100. This sounds like each battery can give out 25 amps for 100 min...

Where do you find these cheap Grid-Tie panels? All I've found are expensive systems for home owners etc. I can get 100W Mono panels for $64.00.

I am getting 2-100w panels and a EPevers 20amp MPPT controller. That controller says max watt imput is 260. That leaves me no room for another panel. If I get a Renogy PWM Wanderer 30 amp it can handle 400watt imput. Cheaper that MPPT enough that I can add another 100W panel later.

I am very new to this solar stuff and I am quickly becoming very confused. I have read many posts about either a 12 volt or 24volt system. I understand about hooking up 2 solar panels either in parralle or series. Same as with 12 volt batteries. But if my RV is a 12 volt negative ground...

All I really care about is the net in or net out and how full the batteries are. Where I am going to put the charge controller is in a battery box area and I really don't want to have to open doors and read it. The battery monitor would be inside RV and also could save money without charge...

I am designing my system for RV. I have 2-100W panels and I will be getting an MPPT controller, so I can add Li batteries later. I also want to put in a battery monitor. The monitor that I am looking at is a 500 amp Renogy Battery Monitor. It has a screen that tells me power going in and...

Probable get 2 Windy Nation 100W for 65.00ea and the get a EPEVER Tracer model AN mppt controller for 82.00 with all the extras. That will get me all that I need to charge my batteries with solar. Buy I would like to know how much amps I am using out of batteries. So I want to but in a...

I have a 12V system. But have seen some youtube videos where they say to hook up 2 12V panels in series to make 24V, then get a SCC that can handle 24V and let it do the work to charge my 12V batteries. With using a MPPT type controller, it is suppose to use the extra voltage to give me more...

I'm just a weekend RV'r with 2-12V lead acid in Northwest. Either looking at 1-170W panel or 2-100W. Don't like putting holes all over roof. Might just use long cord from panel so I can move it around to get max sun rays, so 1 larger panel would be better for ground use. If I get 2-100W would...