5-2
PV+/LOAD+
DC Motor
SUNSTAR
Figure 5.3 Diode Protection
The specifications for the diode follow:
• a power diode
• rated equal or greater than 80 volts
• rated equal or greater than 45 amps (SS-45C) or 60 amps (SS-60C)
For large inductive loads, a heat sink for the diode may be necessary.
5.3 General Load Control Notes
In addition to the inductive loads discussed above, there are a few other load issues that
require attention:
5.3.1 Inverters
Inverters should never be connected to the SunStar.
5.3.2 Parallel SunStars
Two or more SunStars should never be put in parallel for a large load. The controllers
cannot share the load.
5.3.3 Reverse Polarity
If the battery is correctly connected (LEDs are on), the load should be connected very
carefully with regard to polarity (+ / –).
If the polarity is reversed, the controller cannot detect this. There are no indications.
Loads without polarity will not be affected.
Loads with polarity can be damaged. It is possible that the SunStar will go into short circuit
protection before the load is damaged. If the LEDs indicate a “Fault”, be certain to check
for both shorts and reversed polarity connections.
If the controller does not go into short circuit protection, the loads with polarity will be
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