Yes. It's not a breaker so it can't be turned off. You'd have your breaker on your 200amp loads panel, which could be interlocked to your 100 amp circuit coming out of your combiner box. If you wanted the actual transfer switch, instead of the interlock, you'd have to spend for the 200 amp capacity.
Dual EG4 6000XP Wiring (please review)
- Thread starter solarenvy
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bfaubion
New Member
Reading your posts, I hadn't considered having that breaker interlock in the whole house sub-panel. Similar to @solarenvy, I have that 200 amp main, and 200 amp sub-panel, so I need to decide how I'm going to facilitate the transfer mechanism between the inverters and the direct grid line. In my main, I only have space for 2 breakers, one breaker is being used for the whole house sub-panel, the other slot is empty. So essentially, what you are saying is..
- That I could keep my existing wiring from my main panel to my sub-panel.. and could add another breaker from the main to branch off to a combiner with 2 50 amp breakers for the 6000 xps.
- Then the 2 6000xps feed to another combiner with 2 50 amp breakers, and I can then bring that load directly to the existing whole house sub-panel
- And then in that spot on the sub-panel, I use the breaker interlock. Is that essentially what you plan? Are there any safety concerns here?
bfaubion
New Member
I have 2 questions about about this setup because I'm considering almost the same thing with two 6000xps.
- Do you need two 50 amp breakers feeding into the separate 6000xps, or could you make it work with just one 100 amp breaker coming off your main, and then branching inverter #2 off of Inverter #1? I only have two spots on my main panel, and the grid bypass needs one of them with the existing whole house breaker, which leaves just one breaker for both inverters.
- Can your combiner and bypass be the same panel if you use a breaker interlock, rather than a whole separate bypass switch? I'd rather not buy that expensive 200 amp MTS, if I could make it work in one box with the breaker interlock. So in my case, you'd have 2 50 amp breakers for the inverters, and a 200 amp breaker for the bypass.
Zapper77
Renaissance Man
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- Jul 23, 2022
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1. You would need to (should) protect the line going from the 100 amp split to the 6000xp grid connection with a Over Current Protection device.
I would use a 4/8 circuit panel. Land the 100 amp in the panel and run two 40/50 amp breaks to each inverter.
Don't daisy chain #2 of of #1
2. I've seen individuals use the same panel...but I'd never recommend doing that.
Edit...#2, would I do it...yes I would,but I'd never admit it.
bfaubion
New Member
@Zapper77 ok, thanks for that info! .1 seems straight-forward.. just feed to this load center and install 2 50 amp breakers that each to go an inverter. But about .2, haha.. so if I hired an electrician to help me wire it up, is there a recommended method? Would I need another of that same 125 amp load centers that the two inverters output to, combine, and then feed that into an MTS? I guess I'm just trying to find the simplest way to wire this up with a grid bypass.. I know that adds an extra level of complexity, but it sounds like it is recommended.
AZ Solar Junkie
Maricopa, AZ
That’s exactly my plan when I add a second 6000xp.
bfaubion
New Member
That’s exactly my plan when I add a second 6000xp.
What is your meter main and sub-panel setup? For me I have this 200 amp service, but the combined in the 6000xp cuts that in half of course… so I’m wondering if I can just downgrade to 100 amps for the grid bypass as well. It cuts down on equipment cost also. The only issue I see is when I might be running the electric oven (on a 50 amp breaker) and AC or Heating at the same time.That’s exactly my plan when I add a second 6000xp.
I guess it seems like a lot of boxes, doing the combiner before the 6000xps, then another combiner after, and then the MTS as well.. but I suppose it is what it is. Alternatively I had considered an 18kpv, because it is full 200 amp pass through. I’m wondering if there is an advantage in my case for the 18kpv over 2 6000xp.
AZ Solar Junkie
Maricopa, AZ
Yeah like you’re suggesting, I’ll be using 2 small 6 slot 100 amp panels - 1 to distribute power from my main panel to the 6000xp’s inputs and the other to combine the outputs. From the output combiner panel I’ll be going to a Reliance Pro/Tran 2 50 amp MTS. I wish there were a higher amp MTS option that supported switching individual circuits between grid or solar, but if there are I haven’t found any.
Going with a single 18kPV would certainly eliminate the combiner panels and allow the full 200 amp bypass and give you more capabilities - just costs a lot more. I don’t have any personal experience with it (or any other grid export capable inverter) so I’d have to leave that to others to expound on. There are also entire threads discussing the advantages and disadvantages of using multiple 6000xp’s vs the 18kPV.
