Comment by walrus01

For large loads, at $0.32 to $0.50/kWh in Hawaii it is now much more economical to disconnect from the grid entirely, unless you have some limiting factor that would prohibit large scale low cost mounting of a huge number of 1.65 x 1.0 (60-cell) or 1.99 x 1.0 meter (72-cell) size high efficiency PV panels. The ROI can be well under 6 years.