Definitions of many of the frequently used terms within renewable energy.
Friendly. Knowledgeable. Helpful.
“Hope to do more business with you in the future. altE rocks! Best customer service anywhere!” – Joe Stratham, NH
Renewable Energy Articles
Solar electricity does not have to be complicated. However, becoming a PV system owner does require a basic level of understanding, and this article is a good place to start.
Understanding the basics of electricity is an important building block for any work with PV.
Voltage-schmoltage! Read more about the four main voltages used in RE systems.
Solar energy is a resource for all parts of the world. Read on to find out more about your specific location.
A: This is a trick question! There is no direct correlation between square footage and watts of solar to power the home.
Learn some tips for using solar or wind power systems in your RV or boat - and what's different about this application from using one of these systems in your home.
A basic overview of the components needed for an utility grid-connected system.
A basic overview of the components needed for an off-grid (or stand-alone) system.
"The right tool for the job makes all the difference."
In areas where power outages are common, backup power sources are extremely important. Depending upon what loads you need to run and for what period of time, you may need an actual battery based system.
Many of the folks who visit our site are interested in installing a solar or wind electric system for their home but they do not know where to begin. Although to a certain degree each situation is different there are a few basic things that we will need to know to get you started.
Before beginning your renewable energy journey, read this guide on the five most important tips to consider.
Yes, but there's a much better way...
Solar electric panels (also known as photovoltaic modules) are perhaps the most popular of the renewable energy technologies for home owners. This article goes over some of technical basics behind solar electric panels and how they are used in larger systems.
Are you thinking about buying a solar panel system but don't know where to start? You came to the right place!
Every solar panel is rated to produce a certain wattage, voltage and amperage under specific conditions. Learn more about how modules earn these ratings and what factors affect energy production.
Unlock the mysteries behind the jargon and acronyms of voltage!
Two parallel strings of two modules in series.
PV modules often come with special connectors (wires) on the back rather than just a junction box. There are several different types of connectors, and it's important to understand the difference between them.
Learn how to properly install an off-grid inverter with this step-by-step guide.
How do you size a PWM solar charge controller? With a little math, it's pretty easy!
Learn the pros and cons of PWM and MPPT charge controllers with these comparisons and accompanying video.
Accurately knowing the state of charge of your batteries and keeping them properly charged can extend their life, keep your system running properly, and save you money.
Basic schematics with examples of series and parallel connections for batteries.
Short answer: It depends on the size of the system and what type of loads you want to run...
Maybe. But there are reasons to consider not to...
Quickly find the the typical power rating (in Watts) of many common household appliances. Use this information to help estimate how large your alternative energy system needs to be.
What is magnetic declination, and why is it important when mounting solar panels?
U.S. Department of Energy handbooks for improving new home efficiency, comfort and durability in various climates zones.
Wind turbine systems for homes are one of the more cost effective forms of generating electricity from a renewable energy source if you have the right site.
Wind power works very well on its own or in tandem with solar PV - under the right circumstances. Find out how to determine if wind power is right for you.
Learn about the history, costs, and types of small wind turbines.
A few key tips on how to locate a wind turbine for your location to optimize the power it will generate.
Large scale overview of wind power resources for all of Mexico.
Solar-powered pumps provide a welcome alternative to fuel-burning engines, windmills, and hand pumps. They produce best during sunny weather, when the need for water is greatest.
The design considerations you should take into account when deploying the accessories needed in a solar water pumping system.
Learn the basics of micro hydro power systems: siting, types, and components.
When you know how much water is flowing through your stream or river, how do you determine how much electric power can be generated?
Learn more about two of the most efficient renewable energy technologies out there!
Homes from north Texas to Canada are using solar heaters in conjunction with their normal heating system to reduce their yearly heating bills by as much as 30% - 40%.
Water heating accounts for a substantial portion of energy use at many residential, commercial, institutional, and federal facilities - so it's important that it be done efficiently.
New to solar water heating? Start here.
Solar swimming pool heating is the most cost-effective use of solar energy in many climates.