Hawai'i has some of the highest electrical costs in the country. The last time I checked, 4-1/2yrs ago, we were paying $0.42/kwh. We had an 8kv PV system [16 panels/inverters] installed 4-1/2 years ago on our home. We are grandfathered into the net-metering program, more payback for us than those in the newer system. We use our roof as part of a catchment system feeding a 10k tank in the back yard. We do not have a solar hot water installation, ... yet. The 2018 Kilauea LERZ eruption missed our place. We were close enough to roast marshmallows, though. We did get damage from the SOx gasses evolved by the eruption. Our insurance just paid out a very nice settlement for the damage to our property from the gasses. We are having a new metal roof installed. The roof removal and installation should begin in about 2 weeks. The PV installation will need to be removed for the roof replacement, then replaced and inspected/tested afterwards. I had bought a timer for the hot water tank a few years ago. I finally installed it recently. Powering the water heater only 8hrs per day has dropped our power consumption enormously. The overage drawn from the grid has dropped 34kwh in the last 7 days. In 3 or more weeks we will be producing more than we have used from the grid, if we continue to use the timer. This has convinced me that we do need solar water heating. After the roof/PV job is done, I will have a solar hot water installation done keeping the electrical as backup. That should drop our power consumption even more, allowing higher water temps than the 120°F we're now set at. I'd like to see at least 130° to 140°F. I miss HOT showers and baths after getting myself chilled. We used all our S facing roof for the PV installation. All that is left is E, W and N facing roof sections. All new residential construction is now required to have SHW on it. In looking around, I see a lot of SHW installs that are facing E and/or W. That may be because that is all that is available on those houses because of their orientation. This has me thinking that being S facing is not as important for SHW as it is for PV, maybe one on an E facing and one on a W facing section might do the job. Thoughts?