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Open Roads Forum  >  Tech Issues

 > Chased Down The World's "Best" Solar Cells

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MEXICOWANDERER

las peñas, michoacan, mexico

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Posted: 09/29/20 09:47pm Link  |  Quote  |  Print  |  Notify Moderator

Sure learned me...

24% efficiency
8 junction
Gallium Arsenide
On Earth 100% output for 100+ years.

$114 per cell. Yeah. Individual cell.

Lwiddis

near Jawbone Canyon, CA

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Posted: 09/30/20 08:02am Link  |  Quote  |  Print  |  Notify Moderator

But in five years....


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, 300 watts solar-parallel & MPPT, Trojan T-125s. TALL pole for flags. Prefer USFS, COE, BLM, NPS, TVA, USF&WS, state & county camps. Bicyclist! 14 year Army vet - 11B40 then 11A - (MOS 1542 & 1560)


jaycocreek

Idaho

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Posted: 09/30/20 08:23am Link  |  Quote  |  Print  |  Notify Moderator

Some of these claims has me wondering..lol...

Example:
Sunpower solar panels with Maxeon cells boast 25% efficiency and even Jackery portable solar panels advertise 23.7% efficiency..In a side by side test with everything the same,there was a 2 watt difference in input...

Being fairly new to solar,I find it all interesting.


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2oldman

New Mexico

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Posted: 09/30/20 08:45am Link  |  Quote  |  Print  |  Notify Moderator

jaycocreek wrote:

sunpower solar panels with Maxeon cells boast 25% efficiency and even Jackery portable solar panels advertise 23.7% efficiency...
My research shows the best we have is about 22.7%

jaycocreek

Idaho

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Posted: 09/30/20 08:52am Link  |  Quote  |  Print  |  Notify Moderator

2oldman wrote:

jaycocreek wrote:

sunpower solar panels with Maxeon cells boast 25% efficiency and even Jackery portable solar panels advertise 23.7% efficiency...
My research shows the best we have is about 22.7%


This is off of Sunpower's site and there 170 watt panel.

Solar Cells Prime monocrystalline
25% efficiency SunPower IBC cells


And this off of the Jackery site.

Made with monocrystalline solar cells, and equipped with adjustable stands, the charging efficiency can be up to 23.7%.

2oldman

New Mexico

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Posted: 09/30/20 08:55am Link  |  Quote  |  Print  |  Notify Moderator

jaycocreek wrote:

.., the charging efficiency can be up to 23.7%.
"can be up to" probably means at cold temperatures in noon sun. The wattage on panels is almost never reached either.

jaycocreek

Idaho

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Posted: 09/30/20 08:58am Link  |  Quote  |  Print  |  Notify Moderator

I actually do not know but I was somewhat surprised to see Renogy was only 21% and they "say" that most of the panels are sub 20%..

jdc1

Rescue, Ca

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Posted: 09/30/20 09:06am Link  |  Quote  |  Print  |  Notify Moderator

Top three panels made:
SunPower (you'll pay a premium for this product)
Panasonic
LG
They all have 25 year warranties. Panasonic panels are made in the USA. They have been in business since 1918.

bighatnohorse

Gig Harbor - Cave Creek

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Posted: 09/30/20 09:07am Link  |  Quote  |  Print  |  Notify Moderator

Gallium Arsenide is what cell phones use instead of silicon.
I purchased stock in Triquint Semiconductor many years ago and wish I had kept it.

Gallium arsenide is very expensive to manufacture. When and if manufacturing costs are ever substantially reduced then our current solar technology would become obsolete. (Which seems to be the way of electronics.)

Stanford University 2015 report


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jaycocreek

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Posted: 09/30/20 09:09am Link  |  Quote  |  Print  |  Notify Moderator

2oldman wrote:

jaycocreek wrote:

.., the charging efficiency can be up to 23.7%.
"can be up to" probably means at cold temperatures in noon sun. The wattage on panels is almost never reached either.


In using my Jackery 100 watt portable panels, I have gotten 82 watts off of one 100 watt panel, but mostly 70 watts and below depending on many things and an amature trying to get angles correct..

Being kinda new to solar and panels,I really put my attention to actual hands on and not advertised numbers..As I have mentioned,Hobtech compares panels side by side on input only changing the connections..Everything is exactly the same.

That's the only way to tell in my opinion which one grabs the most solar..

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