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Manual

Power Supply

4.3 Solar Panel

4.3.1 General

The solar panel is a photovoltaic (PV) power source used for charging the sealed lead-acid battery of the Met Station.

It therefore constitutes the primary energy source of the system, although it does not directly power the datalogger

and sensors. The MSX10 solar panel itself does not include a regulator. Instead, the charging process is controlled

by the regulator included in the PS12-LA power supply. The solar panel operates in both direct and diffuse light, but

obviously not at night.

The solar panel concerns a polycrystalline module type MSX10 with a maximum output of 10 W. Detailed specifica-

tions are presented in the Campbell Scientific Instruction Manual on MSX10 Solar Panels.

4.3.2 Installation

To receive maximum insolation, the panel should be mounted facing south in the Northern Hemisphere, and facing

north in the Southern Hemisphere. It should be attached to the tripod mast using the provided nuts and bracket,

with a tilt angle of 80%. Make sure that no part of the panel is shaded or covered by trees, constructions, or other

objects, as this will reduce the output or may even permanently damage the unit. Please note that even if a single

cell is shaded, the output of a crystalline module will fall considerably. Figure 14 shows the mounting of the panel

on the tripod.

Once the MSX10 is mounted properly, route the solar panel cable through the opening at the bottom of the protec-

tive ENC12/14 enclosure to the PS12-LA power supply, and insert the two pre-stripped and tinned leads into the ter-

minal labeled ‘CHG’ on the unit. See figure 12 for the input terminals of the power supply. Polarity does not matter.

4.3.3 Use

Once properly installed and connected to the PS12-LA power supply, the MSX10 Solar Panel does not require any

attention except for some periodic minor maintenance. There are no user actions required in operating the solar

panel.

Figure 14: Mounting of the Solar Panel on the Tripod

Tripod Mast

Panel Support

Solar Panel

Tilt Angle

MSX10 Solar Panel

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Campbell Met One 034A-L Betreibershandbuch Seite 37