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HeadSet
2025 Dec 24, 5:55pm
HeadSet
2025 Dec 24, 5:55pm
Patrick says
That is a common technique out here. Virgina law requires that a rooftop solar water heater must feed into a conventional hot water tank. The purpose is to cool down the water since the rooftop system will heat the water above the 160 degrees considered safe for a hot water supply. I had an Australian friend tell me that back home there is no water heaters, as the issue there is cooling the water down (Australia is partly in the tropics).
Using a parabolic mirror to concentrate sunlight on the cold water input to a hot water tank sounds cost-effective.
That is a common technique out here. Virgina law requires that a rooftop solar water heater must feed into a conventional hot water tank. The purpose is to cool down the water since the rooftop system will heat the water above the 160 degrees considered safe for a hot water supply. I had an Australian friend tell me that back home there is no water heaters, as the issue there is cooling the water down (Australia is partly in the tropics).
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I did the math of Tesla solar panels. Cost is $17.4K after tax incentives. It would cover my monthly electricity bill of $230/mo on average. Add in a powerwall will increase the cost by $8k. Without the powerwall, it’s about 15% ROI. What am I missing?