Years in business

> 10


NABCEP qualified installer



Review score is below industry average of 3.96


Solar panel cost calculator

Latest EFS Energy reviews

Latest review

Scott over 1 month

What I liked about my experience with EFS was they were willing to take on and resolve a problem with my system (that was installed years ago by a company that was no longer in business). Too many of the solar companies I contacted were all too willing to sell me a NEW system, very few were willing to help resolve the problems in a system created by “someone else”. The EFS on-staff engineering team was exceptional in troubleshooting the root of the system problem I had encountered and worked to achieve a resolution to the problem. So, if you encounter a problem with your solar system, you might want to contact the people at EFS to fix the problem.

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All EFS Energy reviews

EFS Energy prices

This installer does not publish their standard system prices on the net.

As such we have used average pricing from the installers service areas as a proxy for what this company would most likely charge for a solar system.

System size


Average cost per watt


Net cost of system

$12,938 - $15,813

Average payback time

Annual power production

10,036 kWh

Levelized cost of solar energy

Levelized cost per kWh is the cost of the solar system divided by the total number of kWh produced by a solar system over it’s lifetime.

6¢ kWh

If you don't get solar

24¢ kWh

Forecast average MO electric rates over the next 25 years

Installers description for their business

EFS Energy is built on a foundation of customer service and quality products. Our team of dedicated solar professionals consistently delivers the best systems available on the market today.

Brands sold

This installer does not publish the brands they use on the net.



1283 Research Blvd, St. Louis MO, 63132


(click to reveal) ..5131


EFS Energy

Office locations

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Saint Louis

1283 Research Blvd, St. Louis MO, 63132

ILLINOIS - Springfield

920 South Spring Street Suite 2600, Springfield IL, 62704

Service locations

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Accreditations and affiliations

Better Business Bureau Solar Power World

Service Types

Residential solar - Grid tied

Small commercial solar - Grid tied

Residential solar - Hybrid solar systems

Energy monitoring

NABCEP certifications

NABCEP Certified Solar PV Installer
Paul McKnight

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