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Amjad Lodhi
02-13-2014 06:34 AM

Which solar module is more efficient in hot weather?

which solar module is more efficient in hot weather, module with monocrystalline cells or module with polycrystalline cells.
02-13-2014 08:55 AM
Top #2
Marie Schwarz
02-13-2014 08:55 AM
I think mono is better than poly! Email: pvpowerstores@hotmail.com
02-13-2014 11:38 AM
Top #3
Paul Hughes
02-13-2014 11:38 AM
Coat the Roof with a white highly reflect epoxy coating and you won't loose production on either tyype of panel due to heat...Contact us for more info if you like...
02-13-2014 01:43 PM
Top #4
Lei Yuan
02-13-2014 01:43 PM
Because the power loss=(NOCT-20)*Temperature Coefficient of Pmax, the actual efficiency is determined by two factors. The lower the temperature rise in hot weather and lower temperature coefficient of Pmax are better and no direct relevant with mono or poly.
02-13-2014 04:25 PM
Top #5
Attilio Dalvit
02-13-2014 04:25 PM
Calculation of the Minimum PV Voltage.
This happens at max temperature
using Vmax. Incorporate Cell Temperature of PV specification

Vadjmin = ( (TLocalMax + TCelAdj – TSTC) X CoeffVolTemp) + Vmax
Maximum number of modules in string
Rated System Voltage / Vadjmin
Wattage of max individual strings
No of Modules X Module Wattage
Voltage of max individual string
Vadjmin X No of string modules

It does not matter what is the best the mono or the poly it is related to the specification of the cell itself.
The lower the temperature of the environment and the panel the higher the power output.
NOCT (Normal Operating Cell Temperature) is 45 degree Celcius plus you add the environment temperature to the formula.
I hope this will clear out your concern.
02-13-2014 06:53 PM
Top #6
Mollie Fong
02-13-2014 06:53 PM
woops sorry guys im way off...lol
02-13-2014 09:16 PM
Top #7
Chetan Vyas
02-13-2014 09:16 PM
In hot temperatures of tropical regions, we've observed the incremental benefits of MONO due to higher efficiency are negated by higher price vs. POLY. However if space is not a constraint we've observed aSi thinfilms doing very well due to their extremely low negative temp coefficient of power as well as ability to accommodate higher range of lights. This results in almost 17-20% higher generation of power over a period with availability even during cloudy/rainy days.
We undertake projects of both kinds of Off-Grids and On-Grids with both PV and ThinFilms and have seen their performance in operation.
Chetan Vyas
02-14-2014 12:12 AM
Top #8
Ricardo Regadas Roman
02-14-2014 12:12 AM
Exist a technology called mono-like or mono2. Polycrystalline with almost the behavior of a mono. Link down.

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