Years in business

> 8


Review score is above industry average of 3.96


NABCEP qualified installer



There are no cons noted

Solar panel cost calculator

Latest OnSite Energy reviews

Latest review

Ty Morrison-Heath over 1 month

My new panels look great and are performing well. The whole team at OnSite was great to work with, from the installers to the sales crew. I've worked with them on two projects now, and I know they take care of their customers, with one of the projects requiring some warranty work that was taken care of quickly. My only minor complaint was that they were slammed when I contacted them (Late March 2020), and it took until the end of September before my panels were turned on. Overall I'd absolutely work with them again, though!

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All OnSite Energy reviews

OnSite 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

$13,900 - $16,988

Average payback time

Annual power production

12,274 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

20¢ kWh

Forecast average MT electric rates over the next 25 years

Installers description for their business

Specializing in both residential and commercial applications, our goal is to provide the most efficient and intelligently designed systems at the fairest price. OnSite Energy is co-owned and operated by Orion Thornton and Conor Darby. Orion and Conor are both NABCEP Certified Solar PV Professionals, have a combined 25 years of experience in the Montana solar industry, and upwards of 500 projects designed, installed and serviced across the region. In addition to operating OnSite Energy, Conor and Orion are committed to the advancement and well-being of the renewable energy community. Both Conor and Orion have held leadership roles and are active members of the Montana Renewable Energy Association, and show up to testify in support of renewable energy policy at the Montana legislature. Orion also works as a contract instructor of Solar Energy International (SEI), a premier solar training institute based out of Colorado. Raising their families in homes that are powered by solar electricity, both Conor and Orion are dedicated to a lifetime of learning, working, and living with renewable energy technologies.

Brands sold



1515 N. Rouse Avenue, Bozeman MT, 59715


(click to reveal) ..6135


OnSite Energy

Office locations

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MONTANA - Bozeman

1515 N. Rouse Avenue, Bozeman MT, 59715

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

NABCEP certifications

NABCEP Certified Solar PV Installer
Orion Thornton
NABCEP Certified Solar PV Installer
Samuel Haraldson
NABCEP Certified Solar PV Installer
Sarah Ray

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