Local First Arizona 

Solar Hot Water

SOLAR HOT WATER
Save as much as 30% off utility costs with solar hot water alone.

drainback-diagram_l1r7.jpgDrain Back Systems.

State-of-the-art, fail-safe freeze protection with thermal limiting (active, closed loop, indirect): Collector water is separate from potable water and the collector water drains into a special tank to prevent freezing and overheating concerns once potable water is up to temperature.

 

 

 

 

 

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TERMAL VS PV

  1. Example using 1  4x8 Flat-plate thermal
  2. Or 1,790 Watts-Thermal/Collector OR @ 56 watts-thermal per ft2 (thermal)
  3. PV Energy per ft2: (using  200 watt module)
  4. 15.7 ft2= 200 watts max power =  @13 watts per ft2 (4.3 times less energy per Ft2)
  5. Hot water cost @ $5,000
  6. PV cost @ $7/watt is $12,530 (2.5 times the cost per “watt”)
  7. “PV is most expensive and least efficient way to heat water”