Hey everyone! I'm debating whether to go with microinverters or keep things straightforward by using a string inverter for my solar setup. I live in Washington State and have been looking into the recent regulations covering Rapid Shutdown Devices (RSDs) under NEC 2023. From what I gather, it seems like doing a basic string photovoltaic array might not be an option anymore due to these requirements. Am I right in thinking that I'd either need to incorporate optimizers or solely consider the more expensive option of Enphase microinverters to comply with the RSD rule? For context, I have a perfect roof space for about 20 panels, and I'm hoping to offset my daily power usage, which is around 60 kWh, since I drive an electric Tesla and a Rivian. I also came across some suggestions about having a shutoff switch mechanism near the inverter to meet RSD needs. Has anyone done this successfully, or has anyone been through the inspection process for such a setup?
3 Answers
Midnight Solar has a cool solution for string systems with their shutdown device that you can use on your roof. It’s worth checking out if you want a simpler option without going full microinverter. Plus, if you’re already on top of regulations, this could be a great fit!
If your roof isn’t getting shaded, strings are definitely the way to go! You’ll save on costs and skip some of the efficiency losses that come with micros. A single shutdown switch for your panels and battery storage should comply with the safety requirements. The RSD devices are relatively affordable, so that’s a good option while keeping your install simpler. I say go for it and avoid those micros if possible!
Honestly, I get where you’re coming from! The whole grid dependency thing feels like a trap sometimes. Many companies just push systems without really addressing backup options. If you’re building your own system, you should consider still doing a string inverter, especially since your roof setup is pretty ideal. You might not be completely independent with most grid-tied systems, but there are ways to make it work with some research. Just don’t let those sales pitches steer you away from the right choices!
Yeah, it just feels like they want to keep us tied to the grid. Totally worth looking into different setups that aren't just about what's easiest for them.
That’s solid advice! I've seen how micros can complicate things, so it makes sense to stick to strings if they fit your scenario.