Solar Power FAQs

A: We do not specialize in these areas, but there are some great resources at Watershed Management Group. You can also get a free tour of The Nature Conservancy’s demonstration site on Ft. Lowell and Cherry.

A: Typical systems weigh 3 ½ to 4 pounds per square foot. Most structures built since 1930 can easily support the weight.

A: It stands for photovoltaic.

A: Technically speaking in the solar electric realm, a module is a complete, environmentally-protected unit. A panel is a collection of modules that are mechanically fastened together. For solar thermal, the individual component is called a collector.

A: Silicon and rare metals such as gallium, indium, and selenium. The frames are made of extruded aluminum. The glazing is tempered low iron glass.

A: Estimates are free for grid-tie solar electric and solar thermal systems. There is a nominal charge for estimates for landscape lighting, radiant floor heating, and off-grid solar systems. Typically 50% of the fee is applied toward the final purchase.

A: See above.

A: Southern Arizona and into the Phoenix metro area.

A: In order to ensure that we can provide a system that is appropriate for our customers, we recommend you call for a free estimate.

A: The payback period depends on the cost of electricity and therefore depends on the utility. Typical simple payback is 10-12 years.

A: A solar hot water system will save $30-35/month for the typical family.

A: Contemporary systems are better engineered and have more safety features. In addition, the equipment has longer warranties.

A: Some simple solutions include only running full loads in your dishwashers and washing machines, which saves you money. Converting light bulbs to LEDs or compact fluorescents have a nominal cost, but are more efficient. Additionally, energy efficient equipment and appliances help, along with properly maintaining A/C units and air filters.

A: Tankless water heaters only heat the water being used, whereas traditional water heaters work to keep water warm that is continuously cooling. A family of four can save 35-40% more energy, but a smaller family will save closer to 50%.

A: They are applied to the final tax bill, so if you owed $5,000 in taxes with a $1,000 tax credit, you only owe $4,000. If your withholding exceeds tax liability, the refund increases by the tax credit amount. The Arizona tax credit is 25% of the system cost with a max credit of $1,000. The federal credit is 30% of the net system cost. Net system cost is the contract amount less any utility incentive.

A: Based on the size of the solar pool heating system, you can expect your pool to be 10-12 degrees above the average ambient temperature. For example, if the daytime highs have been about 85 degrees and the nighttime lows about 65 degrees, the pool should be about 85-87 degrees.

A: Yes, of course. Keep in mind though that the utilities do not provide additional incentive to cover the increased cost for the system.

A: It is an option—however, many people seem to think otherwise. Call (520) 322-5180 if you have specific concerns about your off-grid site.

A: Each family has a different utility use profile; in addition, each home has different types and ages of equipment. It is true that the same home will have about the same capability in terms of the total system size, but one home may have use energy efficient lighting, with a high SEER air conditioner, and not have residents home during the day.

A: Even 10% shading can significantly reduce the output of a module. With shading, the output is less and the payment is extended. In addition, some utilities evaluate shading and reduce the incentive accordingly.