I'm doing some deep research for a solar power system for my home in California. Local vendors have quoted me around $25k for a ~4kWp setup with a single Powerwall, but my calculations suggest I could put together a 5.5kWp system using EG4 gear and battery for just $15k, which sounds fun! However, I've hit a snag—how do I get the necessary engineering drawings for permitting? I know some companies like 'Unbound' provide these drawings with their kits, but I'm looking for more affordable alternatives. Any ideas?
3 Answers
You should definitely touch base with your local officials to find out exactly what kind of drawings you need for your permit. For example, I got a septic permit in California with just a quick sketch done by hand on paper at the Planning Department—it took only about twenty minutes! That might help you find a low-cost solution.
If you’re interested, I charge $100 per plan set, and it’s another $100 if you need electrical stamps for your permits. I can help you out with that if you're looking for something professional.
I actually created my own plans from scratch for a 5.5kWh system that cost me around $1200, and since I'm in the country, I didn't need any permits because it's fully off-grid. If the area you're in has less strict rules like that, it might be worth considering.