Campbell Scientific SP50-L/SP90-L Solar Panel - Manual (Page 23)

SP50-L/SP90-L Solar Panel
TO CHARGER BATTERY (+) TERMINAL
TO LOGGER OR RADIO OR OTHER LOAD (+) TERMINAL
TO CHARGER BATTERY (-) TERMINAL
TO LOGGER OR RADIO OR OTHER LOAD (-) TERMINAL
CHARGE
LOAD
BATTERY
POST
14-Amp FUSE
5-Amp FUSE
CHARGE
LOAD
BATTERY
POST
14-Amp FUSE
5-Amp FUSE
LOAD CHA RGE
LOAD CH ARGE
BATTERY TERMINALS
Terminal Strip Bus
Deep Cycle Battery
WIRING DIAGRAM FOR PN 4386 BATTERY TERMINAL BUS
FIGURE 3-19. Battery terminal strip adapters for power connection to
external battery
4. Maintenance
An occasional cleaning of the glass improves the solar panel’s efficiency. If a
problem with the solar panel is suspected, the panel may be checked by
measuring the voltage output. Check the voltage with a voltmeter connected
between the two leads of the solar panel. There must be incident solar
radiation on the panel and there must be a load connected to the solar panel.
The load can be the datalogger, other equipment, or a 75 ohm resistor capable
of dissipating solar panel power between the two leads. No voltage output
implies a bad solar panel, regulator, or cable. The magnitude of the voltage
output depends on the incident solar radiation.
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