POCO System size limits? SCE

[msobal79]

Anyone know what SCE (Southern California Edison) caps PV systems at? I've heard 100% and 110% offset figures.

Also how do I justify it. i.e. If my 2015 elec bill was 20,122 kW of usage does SCE base the offset on DC system size or AC output size?

I'm figuring one would size a system to overcome weather patterns. i.e. (POCO regulations aside) the size of a 100% offset system for annual 20,000 kW usage would not be the same in Phoenix, Arizona vs Seattle, Washington. right?

[J.P.M.]

Not a knock, but maybe part of the reason no one's responded might be because that's the type of stuff that's readily available. Help yourself and root around in the SCE website, or give them a call. I'm sensing a reluctance to be proactive and self reliant here. Maybe part of the reason some vendor took you to the cleaners. Just sayin'.

[bcroe]

Anyone know what SCE (Southern California Edison) caps PV systems at? I've heard 100% and 110% offset figures.

Also how do I justify it. i.e. If my 2015 elec bill was 20,122 kW of usage does SCE base the offset on DC system size or AC output size?

I'm figuring one would size a system to overcome weather patterns. i.e. (POCO regulations aside) the size of a 100% offset system for annual 20,000 kW usage would not be the same in Phoenix, Arizona vs Seattle, Washington. right?

You are right, the same system will have different production under different weather. And while all PoCos are concerned that
the maximum peak power delivered will not cause any kind of overload, some are less concerned about how many KWH a
year are produced. Here in IL you can choose which level (power) system you want to build, irrespective of usage, but with
different terms for each. Seeing a PV system sitting doing very little under the clouds doesn't particularly encourage building
an even bigger one to do little under the clouds. But it is sometimes possible to just add panels to boost cloudy output, orient
them to lengthen running time under good sun, without changing the size of the rest of the system or peak power. This usually
doesn't apply to micro inverters, though it could be done. Bruce Roe

[Git]

I just had a system installed in July. I believe SCE caps at 120% and uses kWh

Our last 12 month usage showed to be 15,453 kWh and we ended up with a 18,500 kWh system

Say you're thinking about adding an electric vehicle, having kids, just want to use the AC more, etc - shouldn't be a problem

I would highly recommend giving this contractor a call - I was very pleased with them and they did a great job.

Baker Electric