[Sticky] Welcome to the EG4 Community Forum!

Thanks for setting this up, really looking forward to using it.  

Pretty Dope Brah!

Looking nice.

Greetings.  How can I be a EG4´s distributor? I´m from Ecuador, a great emergent market for your equipment

Glad to see this site, finally a place to find easy answers without bothering the phone support guys !

I love my EG4 products.  I have the 48V lifepower batteries in the rack plus 2 24v batteries in my RV.  I have one 18KPV in service and a second standing by to be installed as a second.  Plus, I have four 12kbtu heat pumps.  Loving them all.

@milton-ecuador 

At this time, we are not taking on new distributors, but you can always reach out to one of our distributors to become a sub-distributor! I am not typically notified when we are taking on new distributors, but I will ask for that information.

With the first blast of Fall and the drop in temps I found myself going out and looking for this chart to redo my calculations for cold weather.  I figured if I needed them, someone else would too!

original URL ==> https://up.codes/s/maximum-photovoltaic-system-voltage

Oh!  and this is how you use it!

original URL ==>

New here thanks for setting this forum up

@dfwtinker I saw your "How not to burn up my equipment" post in another thread. It looks like you are doing 10 panels in parallel. You could do 2 sets of 5 panels in series and link those 2 sets together in parallel. That would cut your voltage in half and double your amps, so you'd have to check that your operating and short circuit amps are within the equipment's specs. One drawback is if you have a long distance between panels and inverter, you may need a thicker gauge wire to limit voltage drop. In hot weather, your panel voltage drops considerably and the lower it goes, the more loss you have in the transmission line. Here's a couple helpful calculators. https://www.photonik.solar/string-voltage-calculator
https://www.omnicalculator.com/physics/dc-wire-size

I've been considering the 6000XP but it's starting to seem impossible to design a string that maximizes the allowable 5000W per MPPT input without exceeding the units voltage limitation as if it was designed without taking the effects of the cold on panel performance. A 360W panel x 14 would be just a bit over the 5000W on the spec sheet I'd need these questions answered before pulling the trigger"

1. Is the 17A max useable MPPT input current a limit. or can it be higher and anything over 17A is wasted?

2. Can you exceed the 5000W input and the extra is "wasted"? The voltage limits necessitate doing a series/parallel string which requires an even number of panels, so you end up going over the 5000W or considerably under with 2 less panels. 360W to 380W panels seem to be the sweet spot for the 6000XP if it's allowable to go 40W-320W over the 5000W limit.

Maybe I know just enough to be dangerous. That and perhaps the MPPT performs some kind of magic I don't yet understand. It would be nice if the folks at EG4 provided detailed basic info for DIY noobs who understand ohms law, but aren't clear on how their product works in relation to the provided specs?

I give myself headaches sometimes.......

This is a great idea.  I'm sure many people will appreciate the information and interaction that the forum will provide.  

Posted by: @woodpecker65

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I've been considering the 6000XP but it's starting to seem impossible to design a string that maximizes the allowable 5000W per MPPT input without exceeding the units voltage limitation as if it was designed without taking the effects of the cold on panel performance. A 360W panel x 14 would be just a bit over the 5000W on the spec sheet I'd need these questions answered before pulling the trigger"

...

 

I was having the same problems as you have described.  I have decided that I will buy a 12000xp and sell the 6000xp for whatever i can get (or save for an emergency spare).   Perhaps you too should look into the12000xp and avoid my mistakes.  Actually it wasn't a mistake, it was what I could find on the market at the time.  Now that the 12000xp is out, the swap-out seems like a no-brainer for me.   I'm going to follow this thread just to see where you come out!

Best of luck!