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Topic starter
February 7, 2025 6:46 pm
Hello. I'm new to the forum. I am installing a mostly DIY 66-panel, 2x FlexBoss, 1x GridBoss system that will have battery backup as soon as I decide which route to take for those. My questions are AC-side so I'm not certain this forum is proper, but I thought I'd try.
I have a 400A (320A) service with two 200A main panels, both ground-neutral bonded. I plan to use the GridBoss to take one of the panels and either wire the second panel to pull from the 125A Smart Port on the GridBoss and wire a subpanel for the 3 heat pump heat strips that I don't think the GridBoss and the 3/0 wire can handle, or wire up a 200A transfer switch for the second panel.
ONCOR in North Texas requires a visible disconnect outside to take the solar power completely away from the grid service. I would like to install two 100A disconnect switches within 10 feet of the meter, one coming from each FlexBoss and running back into the GridBoss from there.
Question #1: I would like recommendations from anyone with experience backing up a house that occasionally needs more amperage than the 3/0 200A wire going into the GridBoss and how they wired it. The ideas above (transfer switch or subpanel) are the best I can come up with.
Question #2: Can I have two, properly labeled, disconnect switches to shut down the solar backfeed to grid, or do I need to combine the FlexBoss output into a single 200A disconnect switch, then split it back out to run into the GridBoss?
Hopefully all of that makes sense.
Thank you all for your time.
Greg
Topic starter
February 7, 2025 9:48 pm
Replying to myself for an option that might work better:
Living in North Texas, it doesn't get that cold here very often. I could just turn off the breakers for the heat strips. I'd have to think about how to wire it in such a way that if I find that the heat pumps can't keep the house warm enough in the winters, I could possible redo the wires without ripping everything out and starting over. That shouldn't be hard though.
If I did that, I could run everything through the GridBoss, probably. My last thing to figure out is if I can have two service disconnects outside next to the meter.
Thoughts?
Greg
