Hey folks,
I've been working hard on getting our solar setup and interconnection application sorted with PECO, but we've hit a snag at the last hurdle. PECO insists we can't export more than 5 kW due to concerns about voltage rise from their side. We tried to propose limiting our inverter's output to 5 kW through software, but they shot that down, saying PA code focuses on the inverter's nameplate capacity instead of any software limitations.
We're really feeling stuck because 5 kW isn't nearly enough for our needs. We chose a larger inverter specifically for it to function as a full-home UPS during outages and to maximize our solar usage while the grid is up. Dropping down to a 5 kW model just isn't a viable option for us.
Has anyone faced a similar issue with PECO or other utilities? How did you handle it? Did you opt for a non-export setup, use multiple inverters, or adjust your design in some other way? I'd greatly appreciate any insights or experiences you could share.
Thanks a bunch!
2 Answers
If they continue to stick to the 5 kW rule, another option could be to consider a non-export setup. That way, you could connect at the inverter's full capacity without exporting to the grid. They mentioned needing a specific mechanism to prevent the power from going back, so you’d need to work that out too. Just be sure to clarify what precise solutions would satisfy their requirements.
Non-export sounds like a possible workaround, but it can complicate your setup. Just consider how it might affect your energy savings and if it’s truly the right fit for your needs!
It looks like there might be some confusion with the regulations. Actually, per the PA Code Chapter 75, residential systems can have a nameplate capacity of up to 50 kW. So, it seems someone at PECO misinterpreted the code, possibly mistaking the limit for residential systems. You should definitely clarify this with them because it actually sounds like you're compliant, assuming they're just overlooking something in their process.
I can relate! When I was installing, my utility had a limit based on local conditions rather than the general code. It’s not unheard of for these situations to be location-specific.
Yeah, it could definitely be a mix-up. I’ve heard similar stories where utilities misread the codes, sometimes by a lot! Just make sure to ask the right questions and provide them the code reference to clear things up.
That's an interesting route! I’ve seen other installers use relay systems to manage non-export setups; it could work for you. Just keep in mind that some utilities still want detailed specs to review.