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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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.
You can use a panel like this with something like an eco river 2 pro and power devices up to 800w. Currently refurbished units for sale for $239 on eBay. Has a built in battery for storing the power
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
I was thinking the same thing, but the dimensions of their bifacial 195 watt is the same as their mono. But reading more into their specs, the mono has a higher efficiency than the bifacial - but they might be combining the efficiency of the front and back for the bifacial (i.e. 23% on the front and 17% on the back for a combined 20ish%??). Perhaps they are counting some of the back to produce 195 watts on the bifacial but they do claim the bifacial can generate more power over 4 hours than the mono. I've read all different things on their own website. I purchased a few so I can report back in a few days with what I get and do some tests with different combos of front and back coverage to see how it does.
I see. Thanks for the explanation, learned a lot from your post. So looks like panel is just going to the smaller part of cost to solar. Other stuff might add up to be much more expensive. If so, does it sound like maybe I should just call it day a pay somebody else since I won't be saving much right? I was quoted for 28kwh system in Houston for 40k buyout. even with that it takes at least12 years just to break even.
Not sure how you'd feel with DIY, but also in Houston and see a lot of used panels for cheap. Might be a pain to drive around but worth it in the end
It's POSSIBLE to make your own mounts, but that assumes ground level w excellent S exposure. Roof? go pro install.
You'll need an electrician at some point unless you are way outback or in a very forgiving district. If you want him cheap, you gotta learn to wire to code.
Why so much power? AC? Remember, if you live in the desert you can use Swamp Coolers for a fraction of the draw. VERY COLD AIR if the humidity is low. If you have 6-10kw that will give you enough to retreat to a room w a room AC during the monsoon when it gets too humid for evaporative cooling.
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I've used 2 with the Delta 2. Works just fine.
NOTE: I'm still shocked by bifacial panels and really only see them here (probably because they can't sell them). But I'm certainly aware that PV panels have finite lifespans (although I expect by the time you replace them the cost will have plummeted).
The panel with glass is great than plastic.
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Don't expect two unit will bring to 390w power to you.
I purchased this Bifacial solar panel, normally the max output only up to 130w than eco-worthy claimed 195w , it is somehow disappointing than my expectations, I have old EcoFlow 2x100 mono panels for years, but it still gives me 185w power (90+% of its labeled).
Bifacial solar panel needs in perfect reflection to get ideal power output...
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Now regarding vs the BougeRV... P-Type vs N-Type, which the big one is generation in cloudy/shady conditions where the N-Type "wins". Some examples from this cloudy weekend...
ECO-Worthy Cloudy - 37W, 9AM at 28W, 10AM at 42W
BougeRV @ 8AM Cloudy - 48W, 9AM at 40W, 10AM at 50W
ECO-Worthy peak generation of 140W on Jackery Explorer 1000 (original, 7.5AMP limited)
BougeRV peak generation of 151W on Jackery Explorer 1000 (original, 7.5AMP limited)
All to say you get what you pay for. N-Type panels do perform better in cloudy/shady, but not largely so however every bit helps, and the BougeRV panel does have higher voltage which can matter on AMP-capped inputs. But be careful like that Explorer 1000, 30V max, at 28V, that BougeRV will create over voltage at about 36F, vs the lower voltage ECO-Worthy you'd need to get down to -72.6F for 23.7V VOC to become problematic on a 30V system.