[RE-wrenches] dual channel charge controllers?

[Jay]

Hi Kirk

You didn’t give a lot of info but I don’t think there is a product that meets your requirements. 

I’m guessing its either 24v or 48v system with with a  C40 controller. 

Personally I’d leave the old system as 20 year old modules are not cost effectively worth messing with. 
And if you did, you’d get what a couple hundred watts more at max maybe?

And then use the CC that best fits your system for the 5kw new. 100 amp, midnite or OB or Schneider 

My 2 cents 
Jay

> On Jun 1, 2022, at 3:31 PM, Kirk Herander via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:
> 
> 
> All,
> I have an off-grid customer adding more PV to their 20 yr old array. It would be soooo convenient to find a dual channel controller to keep each array separate, instead of sourcing separate new controllers for each array. . The original controller is not mppt. Arrays are 2kw(old Astropowers on roof) and 5kw( bifacials on ground), respectively. Mixing and matching old and new will not work and is bad practice anyway. Thanks.
> -- 
> Kirk Herander / kirkh at vermont.solar
> Owner|Principal, VT Solar, LLC
> Celebrating our 31st Anniversary 1991-2022!!
> www.vermont.solar
> dba Vermont Solar Engineering
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