Campbell Scientific CR200 Operation Manual - Page 68
CR200X Power Supply
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Section 6. CR200(X) Power Supply Auxiliary photovoltaic power sources may be used to maintain charge on lead acid batteries. Unregulated solar panels may be connected to Charge + and Charge - channels on the datalogger wiring panel. When selecting a solar panel, a rule-of-thumb is that on a stormy overcast day the panel should provide enough charge to meet the system current drain (assume 10% of average annual global radiation, kW/m2). Specific site information, if available, could strongly influence the solar panel selection. For example, local effects such as mountain shadows, fog from valley inversion, snow, ice, leaves, birds, etc. shading the panel should be considered. If help is needed in determining system power requirements, contact Campbell Scientific's Marketing Department. 54
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