Slam Valve Motor, supplying
efficient steam engines for homeowners and professional solar installers
cheapest solar power on the planet
The economics of solar power
Currently most consumers within
the US are paying between 20 and 40 cents per kwatt hour marginal rate.
To find out what you pay, get two electric bills. Divide the difference
in money paid by the difference in kilowatt hours consumed. This is the
rate you pay for consuming one more or less kilowatt hour. Businesses
are generally railed at 40 cents per kwatt hour. Electric rates appear
certain to increase in the near future.
parallel with this bill, homeowners and businesses also pay $1.50 per
therm or equivalent and up for space heating and hot water. Solar
thermal can reduce both bills simultaneously. Solar thermal works in
parallel with your existing systems, so the electricity and hot water
you use are exactly the same sun or clouds, but the amount you pay is
less. Solar thermal systems use materials costing under $1000 for a 6x8
foot array. An 8 foot array produces average 500 watts of electricity
in full sunlight and 2500 watts of heat for hot water. At an average of
6 hours per day of full sun (equivalent) this pays for its materials in
2.28 years from electricity generated, and 3.5 years in hot water, or
1.4 years combined. The electricity is always credited, the hot water
has to offset hot water being consumed at the time.
instead of generating electricity one runs a pool pump, the same array
can turn a 1 horsepower pump for an average of 6 hours per day. The
array will pump more in summer and less in winter which is desirable
and heat the water as well. This saves 1500 watts of power at 6 hours
per day, reducing the payoff time to under a year. Compare with
photovoltaics with payoff times at 15-20 years.
Installation will be very profitable in the early decade or
so, as the market for solar power becomes larger. With installed system
payoff times in the 3 year range, the majority of homeowners will
become customers. Very few individuals have access to investments that
provide 33% return per year. Pool pumps and businesses with flat roofs
and belt driven refrigeration equipment will be the most profitable
sectors. Businesses with a need for large amount of hot water as in
restaurants and hotels will be a substantial secondary market, followed
by pure electric consumers.