Off-Grid Solar Photovoltaics (PV)

Off-grid PV systems utilize batteries to store electricity when there is sufficient solar radiation to satisfy the electrical demands in the home. The systems, also known as “standalone” systems, range from small systems for running emergency signs and lighting to systems that satisfy the full demands of a home or business. These systems are typically utilized in places where access to the grid is impractical or expensive. These systems are commonly used for seasonal cabins and homes located away from existing electrical infrastructure.

Click here for samples of our off-grid solar photovoltaic (PV) projects.

Generator backup

Most off-grid systems are supplemented by a generator that provides consistent power even when there is limited access to the sun. The demand for a generator depends upon the storage capacity of the battery bank, the electricity demand, and the ability for the PV modules to recharge the battery bank. We provide generator installation services for our off-grid clients.

We work to provide a balance between cost and comfort – namely the cost of batteries and propane for running a generator and the comfort of having a system that provides continuous electricity while minimizing the hum of a generator.

Off-grid Design

Due to the need for electrical reliability, the design process for off-grid system is very detailed and requires an accurate assessment of the electrical use at the site.

We provide the design and installation of certain off-grid PV systems and generators. Typically, our off-grid clientele are those who are looking for whole-house systems or larger camp systems. Due to the economics of designing and installing small off-grid systems, it is often difficult for us to attend to the design and installation of systems of one or two solar modules. If you are looking for guidance on a system to satisfy small electrical loads, we are willing to connect you with good resources for doing so successfully.

Off-grid Services

Insource Renewables offers design, installation, and maintenance service for off-grid applications. Our emphasis is on high performing, whole-house systems for clients across Maine, including island properties off the Maine coast. Due to the nature of off-grid work, we spend a great deal of time in the design process listening to the specific needs of our clients, identifying opportunities to reduce electrical loads, and setting expectations for system performance.

We also provide services for off-grid systems needing battery replacement, inverter maintenance, or routine maintenance.

Schedule Your Solar Consultation Today!

(207) 659-1054





  • Vaughan has professionally bridged the gap between being a contractor and being an advocate for Maine homeowners in their mission to save energy. He is not a ‘one size fits all’ in terms of efficiency and many times he has recommended our services over his own when looking at the types of challenges homeowners face when decreasing their carbon footprint.

    Bo Jespersen
    Owner / The Breathable Home
  • Working with the Insource Renewables team was for me not only a satisfying experience but also encouraging about the renewable energy industry itself. These people were well-informed and articulate in their advice and planning on my project.

    They brought the fruits of both long experience with solar design and deep conviction about the importance of renewable energy in today’s world. In follow-up, they have been generous and good-natured in answering questions.

    Phoebe Phelps
    Orland, Maine
  • We contracted Insource Renewables to install a solar heater for our swimming pool and a cluster of home energy improvements. We were very pleased with the expertise, integrity, and work ethic of Vaughan Woodruff and his fine team.

    We were consistently informed of and/or consulted on scheduled activities and events throughout. At every juncture, Vaughan and his team were obviously guided by the principle of doing what is right for the customer.

    We have recommended to our friends and continue to unreservedly recommend Insource Renewables for any energy-related projects.

    Michael Leblanc & Rosalie Williams
    Pittsfield, Maine
  • We are very happy with our new solar panels from Insource Renewables. It’s great that, now, our house is a power generation factory! Vaughan and the rest of the team are excellent, knowledgeable, friendly, proactive. Within 2 days of the start of the project, our meter was running backwards! It’s satisfying to make a small but real change in the severe climate issues that our planet is facing. I’m also really thankful that Vaughan connected us with the Greater Bangor Solarize program, which saved us over $2,000 on our installation! Vaughan provided us with many different options and answered so many questions that we had, until we found the solar project that was right for our family.

    Julie Gosse
    Orono, Maine
  • We discovered Insource Renewables (and Backyard Buildings in Unity) this Spring and were immediately taken with the concept of the “solar shed.” We knew we needed to build or buy a shed for some extra outdoor storage, and I’d always wanted to go solar at our house, so this made perfect sense!

    Matt, Vaughan, and the whole team at Insource were excellent to work with, answered all our questions, and made sure everything came together on this project. We are excited to be building out the inside of our shed while knowing we are making power every day just by having this system in our back yard.

    Great job all!

    Bruce Fitzgerald
    South China, Maine
  • When our heat pump had electrical issues, there are a couple of ways that this event could have gone. Insource could have blamed the manufacturer, basically come back and continued to tweak the unit, or – worse yet – not been terribly responsive overall. I can’t tell you how good and stress free it has felt to know that you guys have put the customer first and have done your absolute best in the matter.
    We are very grateful.
    Steve Podgajny
    Brunswick, Maine