eco-worthy-us via eBay has
Eco-Worthy Bifacial 195W 12V Solar Panel on sale for
$87.99.
Shipping is free.
Thanks to Community Member
FeistyWing507 for sharing this deal.
About this product:
- Bifacial solar panels are designed with a transparent back of 12BB solar cells, the back panel uses composite materials, the light transmittance up to 91.5%, the conversion rate of 23%, the power generation is 858Wh per day under ideal conditions, compared to traditional solar panels, the power can up to 33%.
- Solar Technology: Monocrystalline
- Weight: 20.48lbs/9.20kg
- Max Power Current: 9.85A
- Voltage: 12V
- Features: All Daylight Conditions, Monocrystalline, Maintenance Free
- Open Circuit Voltage: 23.7V
- Application: Agriculture/Farming, Shed, Recreational Vehicle (RV)
- Max Power Voltage: 19.8V
- Short Circuit Current: 10.5A
- Size: 52.6" x 26.4" x 1.4"
Top Comments
The bifacial panel is the same size & weight of the mono panel, so I am assuming panel build up and solar cells are the same. With the back covered on a bifacial, you should see similar performance when compared to the monofacial. For instance, eco worthy claims the 195 watt mono facial would provide 780 wh per day under ideal conditions while the bifacial would produce 858 wh. The difference between the two is the scatter light during lower light conditions (morning and evening). With your setup you likely would produce closer to the mono facial because the back of the bifacial wouldn't produce much if any benefit.
So the real question becomes which is cheaper? Traditionally the bifacial panels are more expensive, but it looks like right now the bifacial is a little less, so even if it functions as a mono in your set up, it might be cheaper.
Additionally I have read that the bifacials are more rigid and sturdier because the back is glass instead of the white paneling. That could be just a marketing gimmick, but perhaps something else to consider.
Edit:
As I dig in further I am finding the conversion efficiency for the mono to be 22.83% while the bifacial is 20.17%. So in a bifacial setup that doesn't use the back, I would expect less power produced since the panels are the same size - but I believe we are talking ~5 watts, so maybe 25-40 Wh less per day in this specific scenario.
33 Comments
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Only if bifacial would be applicable for your situation. Which is only in very specific scenarios
Would there be any absorption on the back side if mounted on a travel trailer roof (white)?
Unless the panel was mounted on the roof with a fairly large gap or you installed it on a tilt-able bracket you likely wouldn't get any benefit from the Bifacial aspect of the panel.
The bifacial panel is the same size & weight of the mono panel, so I am assuming panel build up and solar cells are the same. With the back covered on a bifacial, you should see similar performance when compared to the monofacial. For instance, eco worthy claims the 195 watt mono facial would provide 780 wh per day under ideal conditions while the bifacial would produce 858 wh. The difference between the two is the scatter light during lower light conditions (morning and evening). With your setup you likely would produce closer to the mono facial because the back of the bifacial wouldn't produce much if any benefit.
So the real question becomes which is cheaper? Traditionally the bifacial panels are more expensive, but it looks like right now the bifacial is a little less, so even if it functions as a mono in your set up, it might be cheaper.
Additionally I have read that the bifacials are more rigid and sturdier because the back is glass instead of the white paneling. That could be just a marketing gimmick, but perhaps something else to consider.
Edit:
As I dig in further I am finding the conversion efficiency for the mono to be 22.83% while the bifacial is 20.17%. So in a bifacial setup that doesn't use the back, I would expect less power produced since the panels are the same size - but I believe we are talking ~5 watts, so maybe 25-40 Wh less per day in this specific scenario.
The bifacial panel is the same size & weight of the mono panel, so I am assuming panel build up and solar cells are the same. With the back covered on a bifacial, you should see similar performance when compared to the monofacial. For instance, eco worthy claims the 195 watt mono facial would provide 780 wh per day under ideal conditions while the bifacial would produce 858 wh. The difference between the two is the scatter light during lower light conditions (morning and evening). With your setup you likely would produce closer to the mono facial because the back of the bifacial wouldn't produce much if any benefit.
So the real question becomes which is cheaper? Traditionally the bifacial panels are more expensive, but it looks like right now the bifacial is a little less, so even if it functions as a mono in your set up, it might be cheaper.
Additionally I have read that the bifacials are more rigid and sturdier because the back is glass instead of the white paneling. That could be just a marketing gimmick, but perhaps something else to consider.
Is bifacial heavier with the back being glass?
It looks like the mono is heavier:
Mono = 21.47 lbs.
Bi = 20.48 lbs.
The difference seems to be the back paneling and how the wires are mounted. The mono has a junction box in the upper center back, the bifacial has them tucked closer to the upper rail to not block the back.
Their claimed wind and load resistance for both panels is the same, so should be good for most any wind / snow conditions.
Edit:
I'm finding conflicting numbers on their website and even data sheets - so they may be the same weight or at most 1lb difference.
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https://www.youtube.com/watch?v=1SXNjsS
You should shop around for quotes from several companies. But 40k sounds good to me actually. I paid 30k for 10kw system a few years ago. ( but I'm in Oregon so not as much sun) Is the $40k after tax credit, and any local/state discounts?
28KW system is a LOT. You live in the desert and run AC a lot?
Eco-Worthy - 52.6" x 26.4" x 1.4", 20.48lbs/9.20kg
JJN - 53.7 x30.3 x 1.18 in, 24.9 lbs (11.3KG)
BougeRV - 50.7 x 30.2 x 1.4 inches, 22.5lb/10.2KG
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I'd like to make a off grid panel with a standard outlet with 120 V standard . I want to power Sonos speaker a lightbulb and some laptop chargers. I figure I use these all day every day so if they were paid for that would be quite a residual advantage. But I haven't done any of this stuff yet. Also if you've read this far and happened to know how many of these panels would it take to do 120 V and say 400 WAtts. I'm thinking not even get a battery just run it straight from the sun during the day. But I don't know if I can do that either.