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When positioning the solar panel it should always face true south if you are in the northern hemisphere, or true
north if you are in the southern hemisphere. True north is not the same as magnetic north. If you are using a
compass to orient your panels, you need to correct for the difference, which varies with location. Search the web
for "magnetic declination" to find the correction for your location.
Also consider where shadows may fall on the solar panel, the panel needs maximum exposure to the sun to
operate as specified.
Operation
The PP1 and SP1 combination was designed to supply a 12 volt system with a maximum continuous average
current consumption of 53mA. The power rating of the system would be 0.636W; if used 24 hours per day this
would equate to 15.264 Watt-hours. On an average British day, this power could be produced by a solar panel
array of approximately 6 watts. However, you do of course get more power in the middle of summer than in
winter. In summer you could produce that power required with only 3 watts of solar panels. In winter you would
need 15 watts of panels to produce enough power. Hence the SP1 20W panel is more than adequate.
The output from the PP1 is fuse protected by a 1.0 amp anti surge fuse, this is to protect against short circuit on
the output, fuses are 1.0A 20x5 mm ceramic glass tube type. The 100-240 Vac input charger is fuse protected in
the 13 amp plug, if this plug is replaced with any other connector please consider how your PP1 is protected.
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Mantracourt Electronics Limited
T24 Telemetry User Manual
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