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1 Year with Tesla Solar Roof: top 11 questions answered + real production numbers & utility bills! - YouTube
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One year ago on February 8th,
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I received permission to operate from the Los
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Angeles Department of Water and Power and turned
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on my home's fancy new Tesla solar glass roof.
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A few weeks before that, I released a video
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detailing our experience getting the roof
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installed in that video.
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I made the mistake of promising to publish a
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follow up video to talk about power output and to
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answer the most popular viewer questions.
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Well, a lot happened in 2020,
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but that video didn't.
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Sorry about that.
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However, now that the roof has been operational
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for a full calendar year, I've gathered a lot of
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data and a lot of experience.
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So I'm even better equipped to answer those
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questions and provide detailed data on power
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output.
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To begin with, let's start with that term I used
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earlier permission to operate,
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a lot of people were very concerned about that
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phrase and wanted to know why I hadn't just
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turned on the roof as soon as it was installed.
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The answer is pretty boring.
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My roof is contributing power to LA's grid,
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and my utility company needed to verify that the
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system was up to their specifications before it
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could be turned on. That process didn't take all
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that long and I ended up receiving PTO about
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three weeks after installation was complete.
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Is the roof going to catch on fire?
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Well, the fire department signed off on it, so
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I doubt it. Also, the solar tiles get plenty
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of ventilation. A Tesla solar glass roof is
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raised one and a half inches off the surface of
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the waterproof underlayment below, allowing for
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airflow under the solar tiles up to the ridge
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vent at the apex of the roof, which also vents
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our attic and cools our home.
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Does the roof make noise?
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No. Is it waterproof?
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Yes, it's real roof, the
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tiles overlap to prevent leaks and the flashings
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are seamless. In addition, our home is also
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protected by the underlayment, which is Firestone
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Clad- Gard, and that's waterproof, fireproof
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and guaranteed for 25 years.
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Is it too shiny from street level?
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The roof really is not very shiny at all.
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Is it durable?
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Many of you were also interested in how durable
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the solar glass tiles are and whether they would
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hold up to impact from hail or other projectiles.
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The answer is yes.
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Speaking of durability, some of you were
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interested to know the details of the Tesla solar
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glass warranty here.
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I will read directly from the contract.
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Your solar roof will remain in place and prevent
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damage to your home caused by the passage of wind
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and rain for 25 years.
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The power output capacity will be at least 95
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percent of the rated peak power specified on
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the solar roof's datasheet at five years after
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your solar roof is installed and will decline by
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no more than point percent per year for the
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following 20 years.
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One of the most popular questions I received was
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why we didn't opt to get powerwalls installed.
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Powerwalls are pretty expensive.
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And while a powerwall would of course help us in
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the event of a power outage, my wife and I
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decided that really wasn't worth the expense at
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this time.
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How does shade affect energy production?
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Many people have asked how the system deals with
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partial shade and specifically whether or not the
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test of solar glass roof has microinverters.
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The answer is no. The roof does not have
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microinverters, which means that partial shade on
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one part of the roof can affect the performance
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of a larger section of solar tiles as a whole.
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However, the system does employ diode trunk
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harnesses, which somewhat minimize the efficiency
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loss.
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Do you have to clean the roof?
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Yes, especially in Los Angeles, where it almost
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never rains this year.
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That was especially true as California's
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devastating fire season left our roof covered in
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a thick and double layer of ash.
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We ended up hiring Marcus Delgado from South
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Bay Solar Cleaning because he had experience
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cleaning another solar glass roof.
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If you live in Southern California, I highly
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recommend him.
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All that brings us finally to performance.
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How much energy has the roof generated?
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Well, I have the answer after I flip that
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switch. On February 8th, our Tesla solar
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glass roof produced a total of seven thousand
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nine hundred ninety eight kilowatt hours of
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energy in 2020.
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Sixty seven point eight percent of that energy
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went to LADWP's grid and thirty two
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point two percent went directly to our home.
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Seven thousand nine hundred ninety eight kilowatt
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hours is 93 percent of the annual
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8609 kilowatt hours of production,
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which Tesla promised in our original purchase
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agreement. But I mentioned earlier that
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California's severe fire season left my roof
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covered in a thick layer of ash.
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But I did not tell you was that I did not
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actually end up getting the roof cleaned until
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January 2nd of 2021.
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And this chart, you can see that performance
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definitely appeared to take a hit after the fires
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began in August, considering the roof
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was caked in ash for at least five months.
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I consider seven percent underperformance
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entirely acceptable.
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And the good news doesn't stop there.
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In the 12 month period from January 22nd,
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2019 to January 19th, 2020.
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My wife and I paid the Los Angeles Department of
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Water and Power 2245 dollars
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for electricity in the 12 month period from
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January 22nd, 2020 to January
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27th, 2021.
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Our total electrical bill, including fees,
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was one hundred and fifty six dollars and 62
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cents.
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That makes for a total annual savings of 2088
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dollars.
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There we go. I think I've answered all of the
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most popular questions I've received.
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If you do have any further questions, please
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leave them in the comments below and I'll do my
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best to answer them there promptly this time.
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And if you are interested in purchasing a Tesla
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solar glass roof or a Tesla solar panel system
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for your home, please use my referral code, which
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can be found below once your system is activated.
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You'll get one hundred dollars.
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Meanwhile, if you're interested in purchasing a
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Tesla vehicle. Please also consider using the
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referral code and we can each get 1000 miles
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of free supercharging in
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the.
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Thanks for watching.
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