Aleo P23 Manual de instalación - Página 8

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8.4.2 Clearance under the modules

■

Minimum clearance

NOTE

• Rooftop or freefield mounting

Ensure a clearance of at least 4 cm between the rear

edge of the frame and the mounting surface (e.g.

the roof tiles) for the rear ventilation ofthe aleo

module.

• Roof-integrated mounting

Ensure an appropriate interval, for example, to the

trough of the mounting system. Also ensure ade-

quate ridge ventilation, for example, with a roof

ridge ventilator.

■

Maximum clearance

NOTE

• The largest permissible clearance is defined by

national standards. This is used to design the instal

lation on the assumed effects of wind and suction.

• The actual maximum clearance of an installation is

determined by the sub-structure. Ensure that your

sub-structure adheres to the permissible

clearances.

8.5

Avoiding seals

NOTE

• Avoid the use of a seal between aleo modules and

their mounting surface.

• Dry and cool operation can have a positive effect

on the performance as well as the service life of an

aleo module.

• Also for roof-integrated mounting, ensure good

rear ventilation to minimise loss of output which

results from a higher module temperature. Ensure

adequate ridge ventilation, for example, with a

roof ridge ventilator.

8.6

Clearance under the modules

NOTE

• Keep the space behind the laminate free of any

objects. This prevents damage to the insulating

back sheet and the junction box.

• Ensure that sharp or conductive parts (e.g. screws

or nails) do not protrude into the space behind the

module.

• If possible, take measures to prevent foreign

objects (e.g. snow, ice, leaves, twigs, branches

from being able to get behind the module.

Page 8/20

8.7

Shadowing

8.7.1 Avoidance of shadowing

NOTE

• Avoid shadowing of solar modules. This applies also

and especially for shadowing of small areas due to close

small objects like antennas or lightning protectors.

• If there is systematical shadowing in the course of the

day or year because of adjacent objects at the site and

you do not have any opportunity to affect the shado-

wing, then:

- take another site into consideration

- only plan with the non-shadowed parts of your site

when you configure your photovoltaic-generator

8.7.2 Effects of shadowing

NOTE

Even shadowing of a single module or solar cell can

appreciably affect the power output of your photovoltaic

plant.

If shadow falls on single solar modules of a photovoltaic

generator or on single solar cells of a solar module, the

shadowed parts generate less or no electrical power

anymore. This may affect the yield of the whole module

string and therefore the whole generator.

Furthermore, shadowing often causes the solar cells to

consume the otherwise in the module generated electri-

cal power. This may cause warming of the shadowed cells

in comparison to the not shaded cells, which in extreme

cases can raise the risk of fire.

Constant or systematic shadowing can cause a serious

yield loss and may accelerate the aging process and

therefore causes power loss or failures of the photovol-

taic generator. Avoid shadowing e.g. caused by building

parts, depending on day time or season (esp. in winter) to

optimize the yield and durability of your plant.

8.7.3 Protective devices of the modules

Aleo modules are equipped with bypass-elements to limit

the temperature rising because of the internal power con-

sumption induced by shadowing to a non-critical grade and

thus protect the module. Avoid systematic shadowing also

because the bypass-elements are not suited for constant,

long lasting loads.

aleo solar GmbH | Marius-Eriksen-Straße 1 | 17291 Prenzlau | Germany | [email protected]

Quick Reference Manual Rel. 4.7, 08/2020, EN