Solar Panels
10
Campbell Scientific does not recommend using the chargers built
into the rechargeable CR3000/CR6 dataloggers, or the PS150 series
power supplies to charge large external batteries. It is also generally
inadvisable to connect panels with a greater output than the SP30
(i.e. 30W) to these chargers without first seeking the advice of
Campbell Scientific.
5. Precautions
1. Although the solar panel is unlikely to be damaged by a short-circuit, the
panel leads should be kept separate when not connected to a datalogger or
battery pack.
When using panels of 60W or 100W the potential current output on the panel
can cause sparking or even a fire if connected incorrectly.
2. It is important to match panel output to battery capacity and current drain.
Although an incorrect choice of components can lead to undercharging of the
batteries in overcast conditions, there is little danger of overcharging, even if a
large panel is used with low capacity batteries at very low current drain. Some
care may, however, be needed to prevent the battery cell temperature from
rising if this combination is operated in a climate which is particularly hot and
sunny. The charging circuits built into all Campbell Scientific power supplies
incorporating temperature compensation which will help to prevent
overheating.
6. Maintenance
Visit the site at regular intervals to clean any dirt from the surface of the panel.
The frequency of visits will be site-dependent and may also vary with time of year,
e.g. in the autumn, leaves can fall and stick to the panel.
NOTE
