Re: [RE-wrenches] Building strings of modules with variable voltages?

Wrenches One thing to consider is that a good charge controller will cost more then a few modules so in most cases now with the current pricing is to remove and replace with new, I would like to keep the old ones in play with what ever is controlling them but build the new array, stack them up

Re: [RE-wrenches] Building strings of modules with variable voltages?

Solmetric has some good screen shots of what happens when you combine these modules. My students just did a lab of combining modules (210W and 175W) in series and parallel and testing the PVA 600. In series V add and current drags way down to the lowest I value in the series string. The IV

Re: [RE-wrenches] Building strings of modules with variable voltages?

Whoops, meant for another; posted here by mistake. Allan > On Jun 22, 2016, at 11:56 PM, Dan Fink wrote: > > Sorry, I don't understand the reference. > >> On Jun 22, 2016 11:24 PM, "Allan Sindelar" wrote: >> Ok, does that mean I should dial, oh,

Re: [RE-wrenches] Building strings of modules with variable voltages?

I hate to say in public but l have paired up modules stacked simular to what you want to do, what l have seen is IMP slightly less but still way better then seperate so give it a try. I have done it for the same reason you are looking at. Jerry On Jun 22, 2016 7:37 AM, "Daniel Tittmann"

Re: [RE-wrenches] Building strings of modules with variable voltages?

Sorry, I don't understand the reference. On Jun 22, 2016 11:24 PM, "Allan Sindelar" wrote: > Ok, does that mean I should dial, oh, two of the ten digits of your > number? ;^} > > On Jun 22, 2016, at 11:17 PM, Dan Fink wrote: > > Dan;

Re: [RE-wrenches] Building strings of modules with variable voltages?

Ok, does that mean I should dial, oh, two of the ten digits of your number? ;^} > On Jun 22, 2016, at 11:17 PM, Dan Fink wrote: > > Dan; rough-and-tumble world indeed here off the grid! My understanding is > that Voc will still be additive, minus degradation over the

Re: [RE-wrenches] Building strings of modules with variable voltages?

Dan; rough-and-tumble world indeed here off the grid! My understanding is that Voc will still be additive, minus degradation over the years, but that the larger Pmax modules will be current limited for Imp by the smaller ones. So your 245w modules could only do 100w in the scenario you give. My

[RE-wrenches] Building strings of modules with variable voltages?

In the rough and tumble world of off grid system management for people who have been piecing together systems for years it is not uncommon for our company to come to a project and find many different types of solar modules. In most cases these modules are working fine and producing power but