Hours: After Hours Service Available

2930 Broadway St. Suite A, Eureka, CA 95501



Solar panels are one of the most efficient sources of energy. They convert light into electricity. The most powerful source of light for solar panels is the sun, hence the name ‘solar’ panel. The energy efficiency of solar panels is measured by the amount of sunlight they can convert into electricity for use. It is measured in percentages. They are tested under hail, snow, wind, chemical residue, ice, thermal cycling, UV degradation, insulation resistance, and damp heat. The testing is done in automated facilities to reduce the presence of low-quality panels in the market. Efficiency metrics are different for different brands.

Efficient Solar Panels

Monocrystalline Solar Panels

They are made from pure silicone. They are easy to identify because of their dark color and their edge which appears rounded. Silicone crystals are grown into long rods which are used to make the solar panels. They are very energy efficient with an efficiency percentage of 15 to 20. They are the most efficient solar panels. They are durable and their cost of installation cost is not high. They lose efficiency when sunlight reaches fifty degrees Celsius but the loss is minimal.

Polycrystalline Solar Panels

These solar panels are efficient as well. They are just not as efficient as the monocrystalline panels. Their efficiency ranges from 13 to 16% and they can be identified by their square cut and blue speckled color. The silicone used on these panels is grown in blocks and not as individual cells. Their heat resistance is lower than monocrystalline solar panels.

Thin Film Solar Panels

These solar panels have an efficiency of 7 to 13 %. They are very flexible and lightweight. They are not very difficult to produce and are mostly suited for large scale projects. They degrade faster than mono -and polycrystalline solar panels and they require a lot of space for installation.

Velux Solar Energy with Evans Mechanical

At Evans Mechanical, we provide air conditioning repair and water heating services in Eureka, CA. We believe that installation, maintenance and repair services for heating and cooling systems should be handled by trained and experienced professionals. We are locally owned and operated so every one of our clients feels like family. We treat them with the highest levels of respect and professionalism. We have been serving the locals since 1995 and we are available at all times. Our products and services are good quality ad affordable. Contact us today!

What our customers are saying
Five-Star Customer Reviews

We are always happy with the service from Evans. Your service people are always friendly and professional. And we feel your prices are fair and that you do an excellent job of keeping our heating system in working order. We are glad you are in Humboldt County.

Kimberly T.

The installers are finishing up. We expect to have great results with the new furnace & the newly installed dehumidifier. We applaud the professionalism of the installers.

Shutterbug S.

Everything was super professional. They showed up on time.kept me informed of what they were going to do and finished ahead of schedule. Work was impeccable! Highly recommended!

Martin R.

Evans Mechanical is an excellent service committed to customer satisfaction and guaranteed quality workmanship. Our water heater burst and they were very responsive. They sent a technician out the same day and it was determined the heater was beyond repair.

Matthew H.

All three technicians worked well together. They treated each other kindly and were thoughtful and courteous with me. They did a final and complete cleanup after the installment of my new heater. They were respectful of my home. I’m grateful I used this company.

Kathy T.

Excellent service from start to finish. Joe came out to give us an estimate on what we would need for a new furnace, never pressured us to buy the top of their line just giving us options on what we would need for our home. Then the date set for installation Thomas and Ryan came out on time and did a great job.

Kathi J.