Is there a reason to not get bifacial panels?

[rhino]

They do make bifacials with clear plastic (DuPont Mylar film) backside for desert installs too, but don't know how common they are.

I've seen them for sale in USA but the plastic ones then have downside of only allowing 80% of the light compared to glass backs.

 

[shadowmaker]

Here's two papers that are favoring bifacials in hot environments: 1 and 2

It seems that modern bifacials are actually cooler than monofacials because IR radiation goes through glass-glass module more easily than white backsheet.

 

[kgard1225]

That's false. Did you watch the video? The bifacials even produced less for their size as well.

Ok, I’m confused now !! I was ready to order 2 200 watt Bougerv bifacial panels for my Anker 767 solar generator . Then I saw some bad reviews and looked at Rich panels but ….. they had 12 volt panels and 24 volt panels ??? They are not returning my phone calls so I’m lost . Can anyone tell me what benefits 24 volt has over 12 volts panels to charge the generator ?

 

[Supervstech]

Ok, I’m confused now !! I was ready to order 2 200 watt Bougerv bifacial panels for my Anker 767 solar generator . Then I saw some bad reviews and looked at Rich panels but ….. they had 12 volt panels and 24 volt panels ??? They are not returning my phone calls so I’m lost . Can anyone tell me what benefits 24 volt has over 12 volts panels to charge the generator ?

Well, this is an odd thread for this question...
But if you look at the specs for the ankler mppt, whatever voltage ot can handle is what you should shoot for with the voc of the panel.

 

[kgard1225]

I was first replying to the bifacial thread and I guess I should have done a separate post. The generator can take from 10 v to 60 v. But that wasn’t my question. I’ll try to find a better place to ask it

 

[SupraSPL]

For what it's worth, I have LG neon2 bifacial 405W panels on my roof right next to REC AA alpha black 365W panels. About 5 " off an asphalt roof surface.

They both have similar power density/ efficiency based on STC rating. The RECs have a lower coefficiency of temp so they should handle high temps better.

The LG bifacial panels consistently outperform the RECs in every single situation. Hot weather, cold weather, off angle, white skies, thin clouds, sudden sun, etc. Adjusting for both size and STC, the RECs perform about 89% as well as the LG bifacials.

It's not that the RECs are underperforming STC, I have seen them hit 363/365W in October. It's that the LGs perform better relative to their STC. Whether or not that's because of the bifacial (clear backing) or they are simply underrating, I can't say.

That said I got the RECs for $50 bucks each because they were blemish 1-year takedowns. Maybe they would perform closer to STC more often if they werent. The LGs were unused, $125 each, craigslist deal, came with a few aluminum scrapes across the glass that I removed with magic erasers and barkeepers friend.

 

[prkrgrp]

This would go on a toyhauler where i plan to tilt the panels when its not driving down the road. Nice white reflective roof. I did a few searches and not finding much. I saw these Renogy panels on amazon is what sparked the interest. Im in Socal if there is a better local option. https://www.amazon.com/gp/product/B0CC22M8ZR/ref=ewc_pr_img_1?smid=A1JVRIAVO15LDT&psc=1