Service size after reducing Main breaker size

[ggunn]

2 answers to questions you did not ask but might be options:
1. You do have the option of a 175A main breaker. In such a case, many electricians (oh no, not me....) don't even do load calcs, they figure 175A covers 99.99% of 200A service loads.

I have hear of some PV designers (oh no, not me, either ) don't do load calcs in some situations but promise the customer if the reduced OCPD ever starts tripping the company will come back out and reinstall the PV system on the supply side for free. As far as I know no customer has ever collected on that promise.

 

[Sierrasparky]

2 answers to questions you did not ask but might be options:
1. You do have the option of a 175A main breaker. In such a case, many electricians (oh no, not me....) don't even do load calcs, they figure 175A covers 99.99% of 200A service loads.
You would need to finnagle your 80A PV output down to 65A though. (65A PV + 175A main brkr = 240A)
Remember you are allowed to use individual inverter output amps when adding them..... instead of adding individual inverter breaker sizes. This helps if there is considerable rounding up.
Sometimes a smaller micro inverter does the trick, with surprisingly minimal to no peak shaving losses.
Details.....
2. Do you actually have a 225A bus? That opens up a whole new world. That means 70A PV ......w/o downsizing nuthin.
Or 95A PV with a 175A main breaker.
E.g. many EATONs are 225A today.

200a bus, I don't think I have seen a single row all-in -one with a 225. I am sure that 225 is what the solar company told the owner.