How big are your water tanks?My water is up to temp by 10am so I can use the dishwasher. My system uses three HW controllers on a priority basis. The final excess goes to a HW tank for my laundry.
How big are your water tanks?My water is up to temp by 10am so I can use the dishwasher. My system uses three HW controllers on a priority basis. The final excess goes to a HW tank for my laundry.
Pv requires 3-4x the space as thermal for the same outputWhen roof real estate is precious, thermal is a poor use of space. Electricity has many uses and thermal is just a waste of hardware once water is up to temperature.
Cost less though.Pv requires 3-4x the space as thermal for the same output
Solar thermal is a worthless asset once the water is hot enough. So, the space is wasted. Solar thermal has lost. Nobody wants it. It only works in industrial scale where water is continuously needed. I've seen lots of solar thermal and five years later they are ripped from the roofs.Pv requires 3-4x the space as thermal for the same output
No doubt, but as mentioned above, once the water is heated, the hardware is idle, PV can send to grid for credit or other uses of energy beside heat,Pv requires 3-4x the space as thermal for the same output
In the same vein pv is worthless when the batteries are full. You size the system for your needsSolar thermal is a worthless asset once the water is hot enough. So, the space is wasted. Solar thermal has lost. Nobody wants it. It only works in industrial scale where water is continuously needed. I've seen lots of solar thermal and five years later they are ripped from the roofs.
That's the key. The most efficient use of space might be a small solar-thermal system to pre-heat water (or even boost heat to a higher storage temperature) -- sized at maybe 20% of total need, plus a heat pump water heater. But, once you figure in the (life-cycle) cost for a new system the premium simply isn't warranted (unless you want to fully DIY the solar thermal system).Solar thermal is a worthless asset once the water is hot enough. So, the space is wasted. Solar thermal has lost. Nobody wants it. It only works in industrial scale where water is continuously needed. I've seen lots of solar thermal and five years later they are ripped from the roofs.
True, but the electricity has more potential opportunistic uses than low-grade heat.In the same vein pv is worthless when the batteries are full. You size the system for your needs
Like charging an EV as one example. It all depends on where you are are standing, I am on grid so there is always the opportunity to get credit.True, but the electricity has more potential opportunistic uses than low-grade heat.
No you can backfeed the grid or use a dump load.In the same vein pv is worthless when the batteries are full. You size the system for your needs
Who is backfeeding the grid when there is no net metering? And net metering is going the way of the dodo.No you can backfeed the grid or use a dump load.
No you can backfeed the grid or use a dump loadIn the same vein pv is worthless when the batteries are full. You size the system for your needs
Still available and dump loads willWho is backfeeding the grid when there is no net metering? And net metering is going the way of the dodo.
I totally agree. Solar people are the greatest energy wasters in the world. I always have somewhere to send excess energyIn the same vein pv is worthless when the batteries are full. You size the system for your needs
The nice thing about diversion to resistance is it is immediate in just a fraction of a second. Chart is just a half hour of diversion. Yellow is power.I start to get the logic of a resistance water heater divert-load for PV.
(That said, here in Hawaii people are still installing thermal hot water systems and being happy with the results. I guess the key factor is not having to worry about freezing temperatures.)
Vegas seems like about the least hospitable place for such a system given the temperature ranges. I would think a failure sensing system (loss of pressure shutoff) would be mandatory. It also seems like an environment where ground source heat pumps would have taken off, but alas...Many other neighbors here in Vegas have leaks with their system as well.
What system are you using to divert the excess power?The nice thing about diversion to resistance is it is immediate in just a fraction of a second. Chart is just a half hour of diversion. Yellow is power.
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You can do it with as little as smart relays, as long as you have enough steps to work with. Ideal way is a static controller that is continuously variable, but I doubt anybody is doing that DIY at home.What system are you using to divert the excess power?