Category Archives: Selecting a Solar Panel Manufacturer

The Most Important Warranties For Your Solar Installation

most important solar warranties

Choosing the right equipment for your solar panel system, and the right company to install it, are both crucial decisions to a successful home solar installation. Solar energy systems come with multiple warranties that apply to different parts of the installation, and trying to keep track of them all can get confusing. Here’s a simple guide to the different warranties for your solar energy system, and which ones you should really pay attention to.
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Cheap Solar Panels: How to Get the Lowest Price Per Watt on the Market

cheapest solar panels per watt EnergySage

You may be looking for the cheapest solar panels available in 2016 in order to really cash in on solar power. And sure, when you install solar on your home or business, you can save thousands on your electricity bills. But going solar isn’t automatically cheap: buying solar panels to install on your roof typically costs thousands of dollars. It’s no wonder that the cost of solar is among the most important considerations for today’s homeowners. If you’re thinking about going solar and worried about prices, you’re probably wondering: what are the best value solar panels and will solar get even cheaper?

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Are Grape Solar Panels Any Good? Here’s the Complete Review

Grape Solar panel kit review EnergySage

Installing solar panels is fast becoming a home improvement project that any homeowner can take on. Now that you can buy solar panels at Costco and Home Depot, you may even be considering installing a home solar energy system yourself. One of the most popular DIY options is to purchase a solar panel kit from Grape Solar, an Oregon-based solar panel manufacturer whose products are for sale at Costco and Home Depot. But before you make a Costco solar purchase, we recommend you learn more about how Grape Solar panels compare to other solar panel brands.

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What to Know About a Solar Panel Warranty

What is a solar panel warranty?

A solar panel has two warranties: a performance and equipment guarantee. A solar panel’s performance warranty will typically guarantee 90% production at 10 years and 80% at 25 years. An equipment warranty will typically guarantee 10-12 years without failing. SunPower offers the best warranties.

A solar panel’s product warranty covers the integrity of the panel itself, and protects you against failures due to manufacturing defects, environmental issues, premature wear and tear, etc. As with most warranties, a longer period is generally more advantageous to you, if you own your solar panel system. When evaluating a solar panel warranty and its manufacturer, the two most important factors on which you should focus are:

1. Product (or materials) warranty, and
2. The performance warranty
We’ll address both of these in this article as we break down our process for finding the best solar warranties offered by manufacturers.

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What are the Most Efficient Solar Panels on the Market?

For those looking for the most efficient solar panels for their PV system, the first thing you need to know is how to compare efficiency metrics for different manufacturer brands. Simply put, efficiency (expressed as a percentage) quantifies a solar panel’s ability to convert sunlight into electricity. Given the same amount of sunlight shining for the same duration of time on two solar panels with different efficiency ratings, the more efficient panel will produce more electricity than the less efficient panel.

most efficient solar panels on the market energysage

As the race for the most efficient solar panel continues, it’s important to understand how more efficient panels could mean much bigger solar savings for the everyday consumer.

In practical terms, for two solar panels of the same physical size, if one has a 21% efficiency rating and the other has a 14% efficiency rating, the 21% efficient panel will produce 50% more kilowatt hours (kWh) of electricity under the same conditions as the 14% efficient panel. Thus, maximizing energy use and bill savings is heavily reliant on top tier solar panel energy efficiency.

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What are the top solar panel manufacturers in the USA ?

top solar panel companies and manufacturers

Who are the top solar companies in the world and in the USA? Industry analysts from IHS, SEIA and Renewable Energy World released their list for the year of 2015, based on updated shipping forecasts from each of the companies included. Continue reading

What is the power output of a solar panel?

power output of a solar panel

Power output or wattage is an important factor to consider when comparing solar panel options. You may hear your solar installer say, “it’s a 255 Watt panel” or “the panel I am recommending is a 300 wattage.” Or, when you are reading a quote from a solar installer, you might see numbers like 245W, 300W, or 345W next to the name of the panel. They are all referring to a solar panel’s wattage, capacity and power output. So, what is the typical output of solar panels?

This piece will explain how solar panel ratings work so you can better compare your solar options. All solar panels are rated by the amount of DC (direct current) power they produce under standard test conditions. Solar panel power output is expressed in units of watts (W), and represents the panel’s theoretical power production under ideal sunlight and temperature conditions. Most solar panels on the market today have power output ratings ranging from 200 to 350 watts, with higher power ratings generally viewed as being more favorable than lower power ratings. Pricing in solar is typically measured in dollars per watt ($/w), and the wattage of your solar panels plays a significant part in the overall cost of your solar system.

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Where Are Solar Panels Made and Should You Care?

American-made vs imported solar panels with energysage

One of the things you may have questions about as you shop around for a solar system is where the solar panels are manufactured. This article will help you determine whether a panel’s country of manufacture should be a key consideration for you.

Does it matter where solar panel companies are based and where they make the panels?

When it comes to quality, the mention of any country’s name will evoke an association; each nation has its own brand image, which may or may not be justified. You as a smart solar shopper, however, will want to look at the facts in order to make a more well-informed decision. Our recommendation is to judge each panel by its own merits. (A good place to start is EnergySage’s Solar Buyer’s Guide.) Continue reading

Should You Wait for the Most Efficient Solar Panels?

Should you wait to get the most efficient solar panels?

SolarCity made headlines earlier this month when they announced that they had created “the world’s most efficient solar panels.” In independent laboratory tests by the Renewable Energy Test Center, SolarCity’s new solar panels received a rating of 22.04% efficiency. Given that full production of these panels won’t start until 2017, it’s understandable that solar shoppers are wondering if they should wait until then to buy the most efficient solar panels possible. Before you decide to wait to go solar, there are a few factors you should consider. Continue reading

How To Choose The Best Solar Panel for You

how solar panels connect to the grid EnergySage

Installing a home solar energy system is a smart financial investment for many homeowners. As you evaluate offers from solar companies, there are many different factors to consider – the equipment that you choose for your system, your financing options, and the installer that you select all have an impact on your solar savings. This guide will help you evaluate the different solar panels and inverters available so that you can find the best equipment for your home.  Continue reading