Victron MPPT 100/50 controller

[Bigbillsd]

I built my solar suitcase and it works great. I did end up getting an MPPT controller as I really wanted a Bluetooth interface and those were few and far between. I first purchased a smartsolar 75/15 to hook up my two 100w panels to see if it worked, then after proving the experiment worked just fine I returned it for a smartsolar 100/50 controller. I've got a few questions that are not addressed in their skimpy manual.

If my panels ever produced 101 volts, does it fry the controller or shut it down or? I understand that if it produces more than 50 amps, It only allows 50 amps thru to the batteries.

I just read Sunking's entry about only going up to 600 watts on a 12 volt system. I have 520 Ah of LA batteries.

I am mounting them on an RV roof, meaning they will probably never produce near their rating. Is 700 watts ( 2 x 350 watt) an issue if they are only flat mounted? -Bill

[Sunking]

I just read Sunking's entry about only going up to 600 watts on a 12 volt system.

You need to put that into context. OK sounds like you have 6 x 100 watt panels???

You do not want to mess with limits. If my assumption is correct wire your panels 3S2P and you will be just fine.

[Bigbillsd]

I am looking at mounting 2 x 350 watt grid tie type panels on the roof and using that 100/50 mppt Victron controller to charge the batteries from them.

[Mike90250]

As long as the temperature corrected Cold Voc does not exceed the controllers input rating. As panels get colder, their voltage goes higher.

[littleharbor]

350 watt panels will have relatively high Voc. likely too high for a 100 volt max controller if series wired. If you're charging a 12 volt system you should just parallel wire them, or look into a 150 volt max controller.

What are the stats on these panels?

[Bigbillsd]

I am still looking for panels. I am using the Victron v1.9 Solar Calculator Spreadsheet and as I find potential them adding them to a custom line for it to do all the calculations to validate what might work.