Making Renewable Do-able!

Specializing in off-grid, grid-tie and DIY solar power since 1999.

Shop our wide selection of solar panels, solar power systems and accessories.

Click for Products & Categories

Featured Solar Panels & Solar Gear

View All +

Magnum Energy PT-100 100A MPPT Solar Charge Controller

$875.00

List price $999.00

KiloVault Emergency RESQ Kit, Portable Ground Mount - 2 Panels

$2,195.00

List price $2,400.00

Schneider Electric Conext SW 4048 Inverter/Charger

$1,487.40

List price $2,100.00

News & Blog

Learn Solar

Customers

BLOG UPDATES

Solar and Rockets in Maine – A Match Made in the Heavens Mar 10, 2021

The 2021 Federal Solar Tax Credit Step Down Nov 16, 2020

Replace Lead Acid Batteries with Lithium for Marine and RVs – Why & How Nov 03, 2020

NEWS UPDATES

Coverage from the Texas Solar Energy Society

When Michael Blank was nine, his dad, an electrical engineer, taught him basic wiring. At 13, Blank was doing more complicated electrical tasks than dad was comfortable supervising.

Click here to read more!
altE COVID-19 Outbreak Response Plan: Walk-In Sales & Customer Pick-Ups

Effective March 17, 2020 we will be temporarily suspending our walk-in service to do our part in adhering to the CDC’s recommended social distancing and to protect our employees, their families and our loyal customers.

LATEST YOUTUBE VIDEO

In Part 2 of this video we discuss in detail Charge Rates for deep cycle batteries. We show examples of lead acid and lithium, and why this information is important for designing a battery based solar system.

Charging a battery bank -Part2

New to Solar?

We've written & collected a wide range of articles about all aspects of these solutions. Please feed your curiosity!

Great Places to Start
Solar Panel Systems
Wind Power

Calculators

Rebates

TESTIMONIAL

James, Brooklin, MA says:

I am new to actually using and setting up Alt Energy, and you guys made it accessible, affordable and offered suggestions and guidance every step of the way. To put into perspective how important this is here is a little story. I work in magazine publishing and have been using Adobe Photoshop for more than 15 years and have bought several copies of every version from v1 upto the current v8. I am quite knowledgeable in computers and programs, but was having a problem. I called Adobe, explained my situation, and told them I only had one question. The were quite rude and would not go any further unless I gave the $39.99 per incident. This is a good snapshot of customer service in America today. You guys are the exception. Keep up the good work Alt Energy's day has come and you guys are the King. Thanks.

CUSTOMER STORY

A Green Dream in Action

Roland Goulette has been planning for his renewable energy system since the 1980s. In an effort to save energy, Roland started recycling and purchased florescent light bulbs. This passion for green led him to where he is now. He owns a 24-panel PV and solar hot-water system. Roland and his family are a perfect example of hard work and planning paying off!

SIGN-UP FOR OUR NEWSLETTER +