||Grid-Tie PV Systems are solar
electric systems that interface with your utility meter and export your
surplus energy back to the power company, thereby spinning your meter
This can be
done with batteryless inverters that only work when utility power is
present (not during power outages) or with the more complex battery
back-up systems that provide emergency power. There is no one system
that applies to every home, each one is individually designed, taking
into consideration such things as location, lifestyle, specific
requirements, and of course, price. Land and Sea Solar handles all the
paperwork and permits necessary and makes provides you with a turnkey
Grid-Tie Solar System.
Do you have an open, unshaded area
in your yard that's more than 15 feet from property lines for possible
pole mounting of a solar array (most preferable) or do you have areas
of unobstructed roof that ideally faces south?
(East or west will still catch 85 % of available sun as long as no
shading occurs.) We recommend a site evaluation and we have tools to
measure the amount of available sun at your location.
Is your aim to use solar to
supplement your power consumption or do you also need back-up power
during outages? The extra cost of a battery
system over a grid-tie system can amount to an additional $1500-$3500.
Also, the efficiency of a battery system is about 20% less, so you will
loose that much power production to maintaining the batteries. Another
option for infrequent blackouts is to install a small generator to run
crucial loads, especially if there are 220-volt loads involved.
Determining Your Usage Your daily kilowatt hour consumption is the
crucial piece of info we'll need to determine system size. Look on your
bills or simply call the utility company. They can add up the kilowatt
hours used for 12 months and then divide it by 12 for your monthly
average or ask them to divide it by 365 for the daily average. The
daily kilowatt hour usage can be divided by the amount of average
sunlight received by the solar panels. That number will be 4.5- 5.5
hours depending on exact location.
Santa Cruz Coastal = 4.5
Other areas in Santa Cruz = 4.7 hrs
Sunnyvale = 5.1 hrs.
Let's say you used 13 kWh, and lived in Santa Cruz. 13/ 4.5 = 2.88 kW.
2.88 kilowatts or 2880 watts, is the amount of solar generation you
will need to match the initial consumption. Since there are losses
involved in all phases of the power conversion from sunlight to D.C to
A.C, the losses must be factored into the equation.
The percent of inefficiency will average around 30%. That means that
for every kilowatt of solar installed, 300 watts will be lost to
inefficiencies. That 2880 watts times 130% will mean we need to have
around 3744 watts of solar to generate that amount of power. The rough
cost for labor and materials is between $7-10 per watt for a
grid-intertie system. From that figure, you can deduct the rebates to
get an approximate idea how much you will have to spend. If this is
within your budget, then we can give you an exact bid for the total
Of course it is not necessary to offset
100% of your usage with solar. The most important portion of your
utility usage to offset is the "over baseline" portion of the bill for
which you are being penalized. The utlity penalizes you for any usage
over baselines amount which is somewhere around 350 kilowatt hours and
the penalties increase in multi-tiers. Solar can help get you out of
the most expensive tiers, the ones that almost double the cost per
kilowatt hour. So in other words if you actually needed a 7 kw solar
system to break even, you may find the smaller, less expensive 4 kw
system would be the better value by getting you out of the "over
We offer Site Evaluation service for a cost of $50, which is refundable
when you purchase your system. The evaluation includes a survey of the
site with our solar measuring tool to assess the exact amount of solar
potential at your location as well as measurements necessary to make an
accurate quote on your system.
information please call (eight three
or email us at firstname.lastname@example.org
Utility- Intertie related links:
of Renewables incentives by state
master site for all renewables incentives