Electrical Wiring in the Home/Service Panel Breakers & PV

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Joe wrote at 2011-04-05 22:52:41
Real quick - you are correct that to backfeed 45A of PV you would need to de-rate your main as 40A would be your max with the 120% rule at 200A - there are 175A breakers available for 200A all-in-ones.  If you don't want to worry about nuisance tripping, then Eaton (Cutler-Hammer) actually makes a PV-ready all-in-one which has a 200A main breaker and 225A bussing, so you can backfeed up to 70A of PV.  Part number is MBED3042B200PV - It would run you about $160.


Mike V wrote at 2011-11-22 00:16:23
The Eaton "solar ready panel" solved issues for us with our solar addition. We have two homes on one meter and now there will be two individual solar systems as well. The 225 amp buss rating is terrific for systems that will exceed the 120% rule on a 200 amp buss as in our case. Eaton makes a panel with a 225 amp main breaker as well if your main service conductors are capable of such a rating. (your local utility will send a service planner out to assist in this determination and help schedule a disconnect/connect date for panel replacement)Be aware Eaton also makes this panel with a 200 amp buss rating and it will only handle up to 40 amps of solar input. Finding this panel in stock was not as easy as you may think with all the solar installations being done but it is starting to be a stock item for the better supply houses. The price differential between the 200 amp main breaker model & the 225 amp breaker is sunstantial. The 225 amp model has a 3 to 4 week lead in time as well for orders. I could not find a 225 amp breaker model in San Diego. Good Luck.


sparky00007 wrote at 2013-09-11 04:10:25
Answered by another Electrical Contractor:

I would love to find that panel for $160.  Please post where to buy it.  I have been paying $300-$350.  The only difference between the standard 200A panel and the solar 225A is the bus.  The 225A has a copper plated with tin bus bar and a few extra stickers.  It is rated for 70A of solar according to the manual.  


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Electrical Wiring in the Home

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