What is completely unnecessary is connecting your solar power equipment to HECO's systems.
Buy some good deep cycle batteries and store your own power off grid.
I live in an area which HECO has chosen not to serve, so that solar is a no brainer.
$0.49 per Kilowatt Hour is what HELCO (Hawaii Electric Light Company, HECO's Hawai'i County subsidiary) charges, which is the highest price for electricity in the USA.
I certainly don't need a $35,000 solar power system, I'm getting by on a system which cost me about $5k.
My basic needs are refrigeration and lights, as well as power for small electronics.
For high draw appliances I use a gasoline powered generator. (washer, propane dryer, power tools, etc)
Screw HECO!