1/6/2024 0 Comments Homeline 200 amp panel![]() Your electrician must also add the solar breaker at the opposite end of the bus bar as the main breaker. (Bus Rating x 1.25) - (Main Breaker Amps) = Allowable amps for solar breaker. The code rule for residential solar in Canada is: The main service conductors are still protected at 125A (plus your backfeed will never reach that as it is on its own breaker), and your bus bar is adequately sized for an unlikely but possible spike in load. In fact, that is how older systems are made to accommodate solar without having to do a service upgrade. In Canada, a 225A bus rating with a 125A main breaker means you can put about 100A of solar on that panel. If your existing bus bar, as you say, is 225 A rated and your main breaker is 125A, you have a lot of room for backfeed. ![]() Usually the 200A panel is needed because the bus bar needs to be able to handle potential current from the mains and the solar (in the event that it is sunny out and you are using heavy loads). You'll have to get the utility company to shut off power and pull the meter. Note that swapping out the main breaker is not a DIY job, since the wires coming in are always energized. That would hopefully just be the main breaker and the door. What I would probably do at my own house is, buy the 200A panel and swap out any part that's different. I think you should ask Square D technical support if you are allowed to install a larger main breaker. It is also possible that they use one label for all the variants, so read it carefully and see what it says. It seems silly to replace a whole panel because of a paperwork technicality, but the label is important for anyone who works on it in the future. It seems like it would be reasonable to change over the main breaker (same way you can get convertible main breaker/main lug panels), but then the label that lists the rating would be wrong. ![]() It sounds like the only difference is which main breaker is pre-installed. ![]()
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