But if the panels were protected by a strong glazing system, there may be less problems? i think its the same old story of using something in a way that it wasnt deigned to be used .....
Could be..... bullet proof glass. Sell them as the invincible panels. Lol
ive seen a few pop up on youtube etc, looks like the vertical ventilation/cooling is a real advantage
Well, I designed my setup against low sun angle and constant snowing (it's snowing right now), not as privacy fence.
If the installation is sized to meet the need in the winter, it is probably oversized for summer, so the loss of potential summer production may not be an issue.
My thinking there was the summer angle would be less than winter so the set might suffer a dual loss- less direct angle and lack of the reflective snow for albedo
I copied my old post from another thread:
I think I wrote that in December so things have changed since. Days are getting longer and sun is higher in the sky. Best daily yields are around 200kWh so far, but today it's going to be 230-250kWh (hopefully) as we are getting fast toward spring. Daily worst yields are still around 15-20kWh. Eventually when snow goes away production decreases ~20-30%. This summer I'm going to experiment with albedo to see if there could be cheap fix or not.
If E/W installation, go with vertical, if S/N I'd use ~80 degree instead going fully vertical. This way you should get more summer production and loose nothing in winter. With vertical/close to vertical bifacials it's all about albedo and reflected light from nearby surroundings. Avoid having unnecessary shadows close to your array as there's no reflected light to utilize. It is very different from using traditionally angled panels, but with some optimization there can be decent overall production even with fixed tilt.
The wife and I were discussing it this afternoon, and thinking about 3 strings. 1 each direction East, West and South. That would give the E/W facing panels improved backside exposure as well. I also like your white wall idea. That sure should boost albedo, along with some white rock on the ground if possible.
135 azimuth so SE because I didn't want to interfere farming on that field. I'm loosing some evening production for sure because of "wrong" backside tilt angle, but I calculated that I might be gaining more from front side because it's 700W and backside is only ~500W.
Very interesting. It sure is a game of give and take to get the most out of a system! I can see how a new string @ 230ish Azimuth would knock your production out of the park. I had considered a tracking ground mount for a while, but just way too many moving parts to go wrong for me.
Just looked Tiger Neo specs and they seem to have very nice temp coefs and some are even over 23% efficient (which tells me they need to be nicely engineered to achieve that). Bifaciality though is only 80%(+-5%) in every spec sheet I saw. That's not bad, and they are pretty identical to those my friend got quoted for. I have seen spec sheets over 90% bifaciality, but don't remember where. I don't think that bi-factor number is deal breaker as it all depends $/W. Of course if I could find cheap panels with better bi-factor I'd choose them.
