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Two 200A panel inverter configuration

Altoid

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Joined
Jun 18, 2024
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3
Location
Florida
*Forgot to mention the two 200A panels are located on opposite ends of the house. Two inverters required I assume *

Hello.. first post, still learning and trying to understand the options with two 200A panels (on opposite ends of the house)..

My main goal is reducing grid power. Not really motivated to net meter and export power (for now.. calculus changes as power rates go up). We just finished new construction and have 2 geneac transfer switches installed . One connected to propane generator with 500 gal inground tank. One transfer switch is available for solar power .. I don't fully understand how the dual transfer switches work in tandem with generator and solar inputs ..

My goal is maximize solar + battery back up to reduce grid supply for daily use .

I'm interested in the 18k and the 6000xp inverters. If 2 inverters are needed for two 200A panels, Would to make sense to go with the 6000Xp for one or both panels to save cost ? Or Would it make sense to have at least one 18k for future net metering? Which config is better value/function? Is mix and match common / acceptable?

EG4 Config Options:
1) two 18k .. good but is it worth the cost
2) one 18k (critical panel loads) one 6000xp (other panel)
3) two 6000xp, save upfront cost , no future exporting
 
Last edited:
6000xp can't passthrough 200 amps from the grid.

Grid, especially with time of use rates, will be cheaper than charging from a generator. But may want the generator as plan c when a hurricane knocks out the grid for a week.
 
Hello.. first post, still learning and trying to understand the options with two 200A panels..

My main goal is reducing grid power. Not really motivated to net meter and export power (for now.. calculus changes as power rates go up). We just finished new construction and have 2 geneac transfer switches installed . One connected to propane generator with 500 gal inground tank. One transfer switch is available for solar power .. I don't fully understand how the dual transfer switches work in tandem with generator and solar inputs ..

My goal is maximize solar + battery back up to reduce grid supply for daily use . Could potentially use generator to supplement solar panels for battery charging . I haven't run cost analysis for propane generator vs grid supply for supplemental charging battery back up ..

I'm interested in the 18k and the 6000xp inverters. If 2 inverters are needed for two 200A panels, Would to make sense to go with the 6000Xp for one or both panels to save cost ? Or Would it make sense to have at least one 18k for future net metering? Which config is better value/function? Is mix and match common / acceptable?

EG4 Config Options:
1) two 18k .. good but is it worth the cost
2) one 18k (critical panel loads) one 6000xp (other panel)
3) two 6000xp, save upfront cost , no future exporting
We started out with two 200 amp feeds to two main panels. This came to be due to a large addition done in the 90’s. I converted one of the 200 amp main panels to a subpanel when we went off grid last year. they are side-by-side. Before going off grid we had two inverters operating grid tied, one connected to each panel. This was for about 2 years while I got the system big enough to be able to go off grid.
You can read about the system I’ve built in the about section of my profile, if it is something you think might work in your situation and want to understand more about it ask whatever questions you might have.
 
If you plan to expand your usage, such as an EV, workshop, etc., the 18k would be the better path.
I was running out of space when I expanded to 4-6500ex, then started adding EVs and a workshop.
I started out with two 12k units for each 200amp panel but quickly found I needed way more.
 

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