Rules Of Thumb For Designing Solar Panel Power System

This would mean a 25 tilt in miami a 35 tilt in raleigh north carolina and a 45 tilt in seattle.

Rules of thumb for designing solar panel power system.

The optimum performance of a photovoltaic panel is obtained when it s correctly aligned to the sun when the sun is directly overhead. Of course you should tilt the panels for maximum power on home systems and that means 15 degrees higher than latitude in winter 15 degrees lower in summer. A small pv system could reduce your electricity needs enough to move you to a different tier lowering your rates and saving you a large amount of money. Often when designing a power system people are tempted to start at the generation source i e.

When designing a system the first things a professional designer will consider will be the sunlight levels for your area insolation and your total power requirement. This is fine if you are going for a top down system and will only load to the available capacity. Historical design rules varied greatly by latitude. The rules of thumb in the solar industry are that the panels should face toward the equator and be mounted at an angle of inclination angle between the ground and the panel equal to the degree latitude of the installation site.

Historically modules were tilted at or near the latitude of the project s location. This usually equates as a fixed mounting to an alignment of around latitude or 15 degrees. In summer you can leave them up high and the longer daylight hours will make up for not optimizing tilt. To determine how many solar panels you can actually use it is important that you know how much roof space you have.