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Is your roof or property contain a fairly large area for the PV system?

The amount of space a PV system needs depends on the size of system you buy. Some residential systems require as little as 50 square feet (a small "starter" system), but others may require as much as 1000 square feet.

Commercial systems are typically even greater. If the limits of your location

the size of your system, you may want to install one that uses more

effective PV modules. Greater efficiency means that the module needs less land to convert the light into a given amount of electricity

power. PV modules are available in a range of types, and offer some

more efficiency per square foot than others (see table on

next page). Although the efficiency (the percent of sunlight converted

power) varies with different types of photovoltaic modules available now

greater efficiency modules typically cost more. system sizing later in this booklet, should also be discussed with your PV provider.

What kind of roof do you have, and what is its condition?

Some roof types are simpler and less expensive to working with, but a PV system can be installed on any type.

Generally, roof shingle composition are the easiest to work, and those with slate are the most difficult. In all cases, experience

solar installer how to work on all types of roofing and can use

technology that eliminates any possibility of leakage. Ask your provider how the PV system Minutes affect the security of your roof.

If your roof is older and must be replaced in the near future, please

must replace both the PV system is installed to avoid the cost

deleting and reinstalling your PV system. PV panels can often be

integrated into the roof itself, and some modules are actually designed

shingles with three legs or raised seam metal roof section. One advantage

these systems is their ability to offset the cost of roofing materials.

What should be your PV system is and what features should it have?

To begin, consider what portion of your current electricity needs you

wish that your PV system to respond.

Example, suppose you want to meet 50% of your electricity needs of your PV system. You can work with your PV provider

discuss the latest bills and

determine the size of the PV system needed to achieve this goal.

You can contact your utility and request the total electricity consumption, measured in kilowatt-hours, your home or business over the last

12 months (or consult your electricity bill if you save). Ask your PV

provider how much your new PV system will produce per year (also

measured in kilowatt-hours) and compare that number to your annual

electricity consumption (called demand) to get an idea of how much you

save. In the next section, we will provide further information on estimating

how much you will save. Some solar rebate programs are capped at a certain amount.

Therefore, a solar electric system that matches this cap maximizes

the benefit of the solar rebate.

To be eligible for net metering in some areas of service, your PV

must have a peak production capacity which is generally not more than 10 kilowatts (10,000 watts), although this peak may differ from state to state.

Also, utilities have different provisions for the purchase of surplus electricity

produced by your system on an annual basis.

Finally, customers eligible for net metering varies a public service.