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Residential FAQ's
PV Solar
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How big are the panels and what do they weigh?
The size depends on the panel output. The size increases as the total output increases. Generally the panels are 39" x 66.5" and weigh about 50 pounds. |
What is net metering?
If you produce more power than you are currently using, your electric meter will run backwards and you will receive full credit from the utility company. However, if you generate more power than you use annually, your credit will be at a lower price to compare rate (generation and transmission charges) shown on your electric bill. |
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What type of panels do we use?
We only use the top rated industry panels to assure you of maximum electricity production. Power output is warranted for 20-25 years and manufacturers may vary depending on availability. |
What if some of the panels are shaded by trees or nearby structures?
As a general rule, a solar array should be free of shade from 9 a.m. to 3 p.m. Even partial shading may result in a dramatic output production. One completely shaded cell in one solar panel may reduce that panel's efficiency by 75%. |
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How does battery back-up work?
Because battery back-up adds cost to the system, we recommend it for households with critical need situations and for those who have frequent and long term power outages. The solar system will fully charge your battery bank and then feed power to the utility grid only after the battery bank is full. If the utility grid blacks out, the battery bank can be set up to automatically power critical household appliances (refrigerators, freezers) and pumps (sump pumps, well pumps). In the event of a utility company electrical outage, these critical items continue to function from the battery bank. PA Sunshine program requires the system to be tied to a utility grid in order to qualify for rebate. |
How much energy will the system produce?
We will calculate the approximate system output. Generally a 10kW system will produce an average of about 12,000kWh per year. |
Installation
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What direction should the panels face?
Because we are in the northern hemisphere, the panels should ideally face south although they may be turned up to 30 degrees off of south. The system will run most efficiently if facing southward, but may face East or West to varying degrees. We will perform a site survey to determine orientation, efficiency and anticipated output. |
How long will it take to install the system?
This depends on the size of the system and where we are mounting the panels. Generally, it will take about two weeks to install a 10 kW system. Obtaining permits and inspections and panel availability also may add several weeks lead time to the process. |
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What angle do the panels need to be tilted?
The latitude in our area is about 40 degrees and the optimal tilt would dictate 40 degrees as well. However, seasonal weather patterns also have an effect on solar production. Therefore, modules are optimally mounted at a 30 degree tilt to take advantage of the sun angle in the summer months as it is higher in the sky and the days are longer. Flat roof mounted systems are usually tilted on racks at 10 degrees in order to withstand heavy winds and prevent uplift. |
General
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What incentives are available?
The Federal Government is offering a 30% tax credit. State rebates change frequently. Schedule a free site survey and ask your solar tech to explain current available incentives in your area. |
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