Author Archives: Vikram Aggarwal

What are the most efficient solar panels on the market?

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most efficient solar panels on the market energysage

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.

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How the 2018 U.S. Solar Tariff Will Impact the Price You Pay

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solar tariff cost impact 2018

We’ve been receiving lots of questions about the new solar tariff from shoppers on the EnergySage Solar Marketplace. Here’s the bottom line for homeowners: this tariff will increase the cost of a typical home solar installation by $500 to $1,000. The good news is that comparison-shopping on EnergySage can save you between $1,500 and $3,000. For commercial customers, the savings could be even higher (more on that later.)

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Five facts you may not know about installing solar

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Over the past few years, solar panels have gone from a rare sighting to a common occurrence on rooftops across America. Thanks to the financial and environmental benefits of installing solar panels, this renewable energy technology shows no signs of slowing down. Here are five facts you may not know about going solar.

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How Much Energy Does a Solar Panel Actually Produce? Electricity Output Explained

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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 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.

How much energy can a solar panel produce?

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 500-550 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.
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Solar Panels for Businesses: Does Commercial Solar Make Sense?

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Commercial solar benefits for business

If you’re a business owner, the concept of “solar panels for businesses” might seem like a risky move in a complex and confusing market. You may have heard about major Fortune 500 companies going solar, but thought that it might not be feasible for your organization. Maybe you’re considering installing solar panels at some point in the distant future, when your organization can afford to make a major investment in something that seems like an environmental “good” rather than a strategic financial decision.

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The Pros and Cons of DIY Solar in 2018

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DIY solar panels graphic energysage

Solar is a trendy thing in 2018 and many adventurous homeowners are beginning to wonder about “diy solar panels” – the concept of building a solar panel system by yourself. Of course, there’s a lot involved in a solar installation and there’s a right and a wrong scenario for do-it-yourself solar projects.

Going solar has major financial benefits: it reduces your monthly electricity costs and can even increase the value of your home. Incentives like the federal tax credit for solar can reduce your net cost by 30 percent or more, but solar is still a big investment, and the price tag can result in sticker shock. To save money, it’s no surprise that many homeowners are considering DIY. Below, we break down the top pros and cons that you need to know about do it yourself solar energy before making a decision as well as the DIY solar process.

The 5 step process to DIY solar panels

  1. Design and size your system based on energy needs
  2. Purchase your solar equipment (solar panels, inverters, racking)
  3. Install the racking or mounts for the panels
  4. Connect the solar panels to your racking equipment
  5. Install a solar inverter

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What to Know About a Solar Panel Warranty

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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 insurance covers the integrity of the panel itself, and protects you against problems such as 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 Is the Environmental Impact of Solar Energy?

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environmental impact of solar energy

Solar energy is a win-win: in addition to its significant financial benefits, going solar is also great for the environment. When your solar panels generate electricity, they produce zero emissions, which means they don’t contribute to climate change or health issues like more traditional sources of energy. They also draw their energy from the sun, an abundant resource that will be available and accessible across the world for the foreseeable future. All that said, what you may not realize is that there is actually an environmental impact of solar energy too.

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Solar Energy vs. Wind Energy: Which is Right for Your Home?

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solar vs wind energy

Installing a renewable energy system on your property is one of the best ways to save money on your electricity bills while reducing your impact on the environment. Often, your decision will be between solar energy and wind energy. If you’re a homeowner weighing your renewable energy options, you already know that thorough research is the best way to find the right system for your home. Here’s everything you need to know about the benefits of residential wind vs. solar so that you can make your decision with confidence.

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Can I go off the grid with solar batteries? Excess solar energy explained

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Going off the grid with solar batteries

Newer, more efficient solar panels and inverters have been in the news recently, but advancements in solar technology aren’t limited to standard equipment. Energy storage is also moving closer to mass-market adoption, and more installers are offering solar batteries and solar panel battery banks (a.k.a. solar-plus-storage) as an option for homeowners.

Solar-plus-storage systems include a battery that captures and stores the excess solar energy generated by the PV system, opening up the possibility of going “off the grid” – a tempting proposition for homeowners who want to sever their connection with utility companies by using renewable energy. As solar batteries become cheaper and more accessible for homeowners, more people are wondering, “Can I use solar batteries to go off the grid with my solar panel system?”

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