From Guest Blogger Solar Energy World: Are Solar Shingles Ready for Prime Time?

images (2)Recently, Tesla announced that orders would begin to be accepted for the long anticipated solar roof shingles Elon Musk has been promising. Despite the hype, our analysts have concluded that solar shingles are not presently an efficient or cost-effective way for homeowners to go solar. This article will explain why.

Starting later this summer limited test systems will be installed in California and new territories will be added through the end of the year. Referred to as “Building-Integrated Photovoltaics” or BIPVs in the construction industry, solar shingles promise to turn rooftop sunlight into savings with a more pleasing aesthetic for homeowners than solar panels by integrating seamlessly with conventional asphalt shingles. They are wireless, snap together and are installed with hammer and nails. However, just like solar panels, they are grid-tied and need an electrician to install the inverter box and tie into the home’s electrical system.

The renewable energy tax incentives are the same for both products, but the price of shingles is much higher than panels even when you factor in the cost of a traditional roof. According to an article in GreenTech Media a solar shingle system that is purchased will take 8 – 11 years to pay back as opposed to the 5 – 7 years a regular solar system will take to pay back the homeowner if they are purchasing their solar system.

It’s actually a longer payback for Maryland-based homeowners. The Tesla solar shingle calculator from their website (example below) shows that in Maryland the system will not pay for itself for 20-25 years and sometimes only save a few thousand dollars even after 30 years!

SOLAR PANELS ARE STILL A BETTER INVESTMENT FOR HOMEOWNERS

These extra costs can make the benefits of shingles less attractive than panels for the budget-minded consumer. This may be the main reason that Dow Chemical killed Power House Shingles last year and why it appears the recent announcements from Tesla are beginning to generate criticism. A Forbes article declaredTesla is misleading the public by comparing their Solar Roof to tile and slate roofs, rather than to solar energy in its many forms.”

These and other sources have revealed solar shingles are also less reliable than panels and tend to have a hard time meeting safety requirements such as rapid shutdown compliance and mandatory rooftop fire lanes.

BIPVs have traditionally suffered from costing more and operating less efficiently than conventional PV. So although Tesla has announced it will be producing a consumer solar shingle that rivals the efficiency and cost of traditional panels, there are no specific details on the product,  its production per shingle or on the connection between cells. None of this has been released yet so there are still a lot of unanswered questions.

WHAT SHOULD A HOMEOWNER DO?

If you have been thinking about going solar, does this mean you should wait until solar shingles are available in your area? NO!

Switching to solar power now is a no-brainer because with a solar PPA, you can pay zero to get solar panels and installation and lock in an electricity rate that is at least 20% lower than what your utility is charging you. Or you can purchase a solar system instead and save up to 100% on your electricity costs.

The truth is you will spend more money by doing nothing than if you made the switch to solar now.

For example,  if you spend $200 a month on your electricity with a yearly increase of 4.5%, in 10 years you will have sent $35,667 to your utility company with no return on your dollars. A solar system would have saved you $23,000 or more on utility costs in less than seven years.

By Sharon Derby

 

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3 comments on “From Guest Blogger Solar Energy World: Are Solar Shingles Ready for Prime Time?
  1. marcopolo says:

    Hmmmm,….who should we believe?

    On the one hand, we have Elon Musk, an outstanding Eco-entrepreneur with a long history of success in innovative technology,

    or,

    Some unqualified blogger with vague facts and suspicious agenda ?

    The problem with this sort of article is the information behind the seemingly authoritative quotes and assertions. Sharon Derby cites GreenTech Media’s Barry Cinnamon as her source. Yet, Barry cheerfully admits he has no actually knowledge of Tesla’s product. technology, or installation methods, but feels free to guess based on his own estimates.

    Sharon Derby certainly doesn’t make clear that her information is based on an ‘expert’ making an uniformed guess based on no evidence.

    As for the rest of her article, it reads like a press release from a Solar company or utility sales pitch, which I suspect is her true agenda.

    Obviously, Solar shingles are designed for aesthetic appeal and must cost more to install. For those who want to advertise their commitment with large panels (and all the associated problems) feel free to do so, but trying to defend that choice by calling Elon Musk a shyster, without evidence, is pretty shabby !

  2. arlene says:

    BIPV has been around for more than a decade and it is true that the cost of installation and support for personnel walking on it has been problematic. Tesla however, has not released the details of their interconnection technique yet. Given Elon Musk’s creative record, I have to believe that they have a whole new methodology for installation and connection, else they wouldn’t have wasted their time. Also, on Tesla’s site, they make it quite clear in their verbiage that this is meant for those who are concerned about the aesthetics of traditional panels. The pricing is extraordinarily high right now, but that is the nature of early adoption. I’m sure it will be very competitive in 2 or so years. Personally, I like ground based PV for the easy maintenance. To each their own.

    • craigshields says:

      Yes, BIPV has been around for a long while. I agree that Musk have something clever going on. The dude never misses, nd anyone who bets against him is an idiot (as I’ve learned the hard way).