At What Angle Should Rooftop Solar Panels Be Installed?

[trevorwesterdahl]

Awesome video. Amazing how nobody points out that the actual angle is overrated.

[eakamjit]

Wallah that's great!!!! Your video is really an eye opener

[gumbah]

Genaeral rule is your latitude + 15 * winter and - 15 * summer. Naples Florida is approximately 26 * +15 = app 40 * in winter and 26-15=11* summer

[jamshedaalam]

I have a flat roof. My panels are laying straight, my perfect angle according to latitude is 24.7°. It will cost me no money to tilt them. Should tilt them at this angle or just let them lay straight?

[jckirby]

Great information man... Thank you from Alabama in the us

[sangEta]

I saw another video measured with a volt/amp meter and the difference between their ideal angle 45 degrees and flat was a 66% loss of power!

[rundmc]

what is the most durable solar panel ? do the back connecting panels have an advantage ? I think people don't factor in enough how degradation rate and life expectancy coupled with inflation and discounting future returns to today effect panel selection decision . I bought LG neon 2 350 but am considering the Prime or Maxion for another project. soo little info on this question I would love a video on it, especially the maths and financials

[johndixon]

Thanks. You just saved me lots of griff and extra work. I have a cistern to collect rain water.. Do the solar panels effect my rain water..? Thanks.

[Oliveir]

Angle depends on latitude. And should oriented for highest consumption season

[chrisjob]

I did some calculations using 1000kW / m2 directly pointing down on the panels and calculating the loss per angle. The figures I came up with were 1.5% loss @ 10⁰, 6% @ 20⁰, 13.5% @ 30⁰, 23.5% @ 40⁰, 35.5% @ 50⁰ and 50% at 60⁰ off angle. In Melbourne where I live, the latitude is close to 38⁰ (half way between winter and summer angle) with 32⁰ being the optimal as you said. What I don't get however is, my panels are aligned with my roof (22.5⁰). This is ok for summer (sun at 76⁰ which makes panel at 14⁰), but not so good for winter (panel at 61⁰). On my 22.5⁰ roof / panel angle, the sun will be about 40⁰ off (i.e. around 35% loss). Am I doing the maths wrong here?

[xmess]

Hi, sorry to be off topic, but this is a question on inverters. Currently I am looking to buy a new inverter (old xantrax is not working anymore). So I know I can just get an inverter that supports my system requirements (3.4kW DC - about 490kWh) but since the cost between a 3.8kW inverter is not much for a 6kW, would it be advisable to just get the 6kW model? I do plan to expand with batteries and perhaps more solar panels. In particular looking into the sunny boy brand.

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Thank you,
Jess

[jhanielgalve]

How to calculate the difference of energy output between angles?

[DanBurgaud]

1:34 I made this mistake; rain + dust left hard stain on the panels.

[ranjibborah]

I donot agree that angle of solar panels should be as per roof level i.e. flat i.e. Horizontal as per ground level. It should be at least 15 to 20 degree from ground level or as per geographical position of your house and also to face the Sun to get a maximum light on solar panels during whole day .

[donlim]

What if the roof’s is facing north? I read in some article the solar panel should be facing south. Thanks in advance.

[albertbresca]

thanks Finn..
I have had a few quotes for my roof which is 4% to the east - some say tilt frames and some say flat..
you say for rain run off min is 10%...
what would you recommend or say about flat on the roof?

[aaba]

If you want to waste your money, lay them flat on your roof, and buy more panels and batteries due to poor panel design. The best orientation is north-east-west tilt adjusted for the short winter days with the longest evenings. Spend some money on the right design, and enjoy it for the next 25 years. Just laying them on the roof reduces the initial quote for the sales guy, but it is bad for the buyer.

[chrisscales]

Very useful video, thank you. Are you able to say what would be the loss of energy installing panels on a vertical wall instead of 15 degrees (which would need additional mounting racks to provide the angel). The latitude is 41 degrees north, in case that is important. Thanks

[alokepaul]

I from Kolkata, India, what degree is perfect to get maximum solar energy generation?

[deanhenthorn]

What if it’s mounted on the walls of an outside wall?