Solar is a Better Investment than S&P 500

Check out NRDC's summary of the Going Solar In America Guide.

According to this study, investing money in a 5kW system for a single-family home will yield higher returns than investing that same amount in the S&P 500. As NRDC states "What's good for our wallets is also good for us as a society, in this case."

Which type of solar panel do I really need?

Which type of solar panel do I really need?


Understanding technology seemed to be easier before, take home energy production for example. You may want to profit from solar panels, maybe you want to benefit from a greener environment on this planet, maybe you don’t want to pay for energy and on top utilize one of the governments’ rebate programs.


Whatever the reason, solar panels are sprouting up like mushrooms (some examples: mono or polycrystalline, cadmium telluride solar cells, amorphous silicon solar cells - and the list goes on), and you are left with a lot of work in terms of researching and understanding what you actually want and need for your property.


Worry not - this article will boil it down for you. We will go through:

  1. The most important technical lingo to know, when looking for solar panels.

  2. The most common types of solar panels with their respective advantages and disadvantages.


The most important technical lingo and things to know, when looking for solar panels:


  • Conversion Efficiency: Means the final power output of your solar panel.

  • Temperature Coefficient: This talks about how effective the solar panel can be due to the temperatures of the surrounding area . Usually, the lower, the better.

  • PID-Resistance: Spelled out, it says potential-induced degradation; normally, this happens due to certain weather conditions. Many  solar panels are better equipped against this issue, so little or no degradation occurs.

  • LID-Resistance: Light-induced degradation resistance. After installation, this process will take place because of the light that hits your panels. Although this degradation comes to an end after a short period of time, there are many panels out there that have a more favourable degradation coefficient.

  • Sizing and Output: Naturally, the size of the solar panel you will be able to install will depend on a few factors:

  • Space available on your roof.

  • General state of your roof, and the stability of the construction.

  • Your available budget and what you want to reach with your solar panels.

The more space available on the roof for building solar panels on, the more power you can generate with your solar system and the more of your electric consumption you can offset

The most common types of solar panels with their respective advantages and disadvantages


Panel type:


All in all, most installers will give you the choice of these four types:


  1. Monocrystalline:


Advantages: Usually yield the highest efficiency, as the silicon used in them is of highest quality. Also need less space on the roof; warranties longer due to longest life expectancy among panels.


Disadvantages: More expensive than other panel types; if partially covered by dirt, snow, or shadow, the whole panel might stop producing.

Verdict: should rather be used in areas without too much snowfall, or with a higher amount of sunny days.


  1. Polycrystalline:


Advantages: Production costs are considerably less.


Disadvantages: Lower efficiency; need more space for an output comparable to polycrystalline panels.


  1. String-ribbon solar panels:


Advantages: Although polycrystalline, in their making companies use only half the amount of silicon needed for monocrystalline panels, resulting in lower costs.


Disadvantages: Lower space efficiency; lower cost efficiency in production.


  1. Thin-film solar cells:


Advantages: Easier mass production; flexibility (can be bent to a certain degree); not as much affected by shadow/dirt, etc.


Disadvantages: Only viable with colossal amounts of space available; conversion efficiency not as good as with other panels.


To sum this all up: The solar panel system you need depends on where you live, the budget you have at your disposal, and the amount of space available.

However, now you should know the basics, so you can actually start making more educated choices in terms of what might better for you. If you feel that you want to know more, you can visit for a plethora of articles about various solar panel topics. Despite the blog concentrating on the United Kingdom as its main market, the topics discussed apply to potential buyers around the globe as well.

We Are Hiring!

Construction Administrative Assistant 

Washington DC, Takoma Park


About Kenergy


Kenergy Solar is a local, privately held solar development firm based in Washington DC. We have been designing and installing solar energy systems for residential and commercial customers in DC, Maryland, Virginia, and Delaware since 2009. We provide custom full service solar installations and provide financing. We also integrate battery storage and solar thermal systems. Solar technology is evolving rapidly and Kenergy continues to stay on the cutting edge to offer its clients new and innovate solutions. While we are a small owner operated firm we regularly work with some of the biggest players in the industry. Working at Kenergy offers an unrivaled level of exposure and experience to the solar industry.


Job Summary


Use attention to detail and organizational ability to complete paperwork and ensure that solar projects are proceeding toward full completion. Applicant will become informed about process details necessary to ensure project success. Paperwork processing includes permits, utility interconnection, grant applications with state renewable energy programs, scheduling of inspections, registration of Solar Renewable Energy Certificates (SRECs), and Public Service Commission filings as necessary. Admin is responsible for maintaining solar construction schedule and running permits.  Admin must also enjoy communicating project details with customers in a friendly and proactive manner. Must be able to use software tools to monitor progress on each job along with providing regular status updates to team members.  In addition provide administrative support to operations and sales teams when needed. 




Required Qualifications


High school diploma or equivalent.

One year related experience.


Preferred Qualifications


Bachelor's degree in a relevant field of study or equivalent.

One or more years related experience.


Must have valid drivers license and own vehicle.


Kenergy Solar is an equal employment/affirmative action employer. If you need accommodation for any part of the employment process because of a medical condition or disability, please send an e-mail to .



Washington DC


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Kenergy Solar is an equal employment/affirmative action employer. If you need accommodation for any part of the employment process because of a medical condition or disability, please send an e-mail to .