Breakthrough:

Commercial investments usually ask for less than 3 years payback, which was too short for unsubsidized solar. We succeeded to breach this economical barrier.

We made it possible by developing about 50 dedicated, efficient solar heaters:

Cost of solar heat versus payback

Q Solar heaters (5-11) pay back in less than half the time of other heaters (1-4).

Most other solar heaters cannot be represented because their total cost is more than $1,000/m2, so their payback time is longer than their service life.

  • [1] - Other glazed small solar air heater: cannot pay back versus natural gas
  • [2] - Other un-glazed large solar air heater: cannot pay back versus natural gas
  • [3] - Other household solar water heater: cannot pay back versus natural gas
  • [4] - Other large size solar water heater: long payback and heavy collectors
  • (5) - Q Solar large solar water heater: glazed, very light, 3 years payback
  • (6) - Q Solar large space air heater, unglazed, payback 2 years versus liquid fuels
  • (7) - Q Solar small space air heater, unglazed, payback 2.5 years versus LPG
  • (8) - Q Solar small space air heater, glazed, payback 3.5 years versus LPG
  • (9) - Q Solar large space air heater, glazed, payback 2 years versus LPG
  • (10) - Q Solar large air heater for industry/agriculture, unglazed, payback 3 years versus coal
  • (11) - Q Solar large water heater industry/agriculture, glazed, payback 2 years versus liquid fuel
  • [12] - Other solar air heater industry/agriculture, glazed, payback 12 years versus natural gas

The Q Solar heaters are an attractive capital investment.