In the continuing quest for the most efficient solar panels, a new technology has emerged as the potential future of photovoltaic technology: perovskite solar cells.
In February 2018, Tesla announced a partnership with home-improvement giant Home Depot to sell and promote Tesla Energy solar installations. As a result, we’ve been receiving lots of questions about the new Tesla Home Depot partnership from shoppers on the EnergySage Solar Marketplace.
Through the partnership, Tesla will be setting up large displays of Tesla Energy products so that shoppers can see them up close in about 800 stores across the country. Displays will be staffed with Tesla Energy employees to answer questions and talk to shoppers about installing solar.
On January 22, 2018, the Trump Administration announced a 30 percent tariff on solar panels and cells imported into the United States. This announcement raised a lot of questions for solar customers on the EnergySage Solar Marketplace. One of the most popular questions: where can I find solar panels that are made in America?
Kyocera is one of the world’s oldest solar panel manufacturers, and has manufactured solar panels since the early 1980s. The electronics company manufactures its solar products in Japan and China, and is one of the most popular brands featured in quotes to solar shoppers comparing their options on the EnergySage Solar Marketplace.
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 has a wattage of 300.” 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.
The amount of available sunlight will vary depending on where you live but for the sake of an example, if you are getting 5 hours of direct sunlight in a sunny state like California you can calculate it this way: 5 hours x 290 watts (a wattage of a premium solar panel) = 1,450 watts or roughly 1.5 kilowatt-hours (kwh). Thus each solar panel in your system would produce a little over 500 kWh of energy per year.
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 home solar panels on the market today have power output ratings ranging from 250 to 400 watts, with higher power ratings generally considered preferable to lower power ratings. Pricing in solar is typically measured in dollars per watt ($/W), and the total wattage of your solar panels plays a significant part in the overall cost of your solar system.
Who are the top solar companies in the world and in the USA? Industry analysts from SPV, SEIA and other organizations offer their top rankings, based on updated shipping forecasts from each of the companies included. *Note: if you are looking for information about the Trump Administration’s tariff on U.S. solar panel imports, read our complete analysis here. Continue reading
When it comes to solar panel manufacturers, there is no shortage of options for homeowners in 2018. Solar panel technology is improving every year, and many solar panel companies offer products that boast both high conversion efficiency numbers as well as impressive long-term warranties. SunPower is the leader with regard to efficiency across the board while LG solar panels are known for top tier design and aesthetic, but companies like SolarWorld and Canadian Solar offer much more appealing prices for their solar panels. How do the top PV manufacturers stack up? We’ll help you compare and contrast your options among the industry leaders – SunPower, Panasonic, Canadian Solar, SolarWorld, LG.
When homeowners are considering solar offers on the EnergySage Solar Marketplace, we often hear questions about a solar panel’s manufacturer origin and whether it’s a good idea to choose Chinese panels for an installation. This is a common question as the latest estimates indicate that China is manufacturing roughly 70% of the world’s solar panels today – a dominant market share and a clear indicator of China’s key role in the global solar industry. China has a significant impact over worldwide solar trends like pricing, warranties and manufacturing practices. For example, the 80% decline in worldwide solar prices between 2008 and 2013 occurred largely due to improvements in manufacturing costs in China. And because China is such a major player in solar, many U.S. homeowners are asking “should I choose Chinese solar panels and will it match the quality of other top brands?” In this article we’ll break down pricing, quality and brand influence of Chinese solar panels.
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.
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
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.
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.