Sunforce Wind Power Notice D'utilisation page 9

Bat Full The MPPT is waiting for the battery voltage to fall to just below the float voltage set point
before continuing with the float stage. This may also be displayed when external DC charging
sources are present.
Float The charger is in constant-voltage state at a lower voltage than in absorption mode
(approx. 13.8V for a 12V system). This allows the battery to draw just enough current to make up
for its internal leakage current. When the charger is in this mode, the battery may remain
connected to the charger for all of the battery's service life with no damage to the battery.
Re-Cal There is certain abnormal conditions that can confuse the current measuring method in
the MPPT. When and if this happens, the MPPT will temporarily stop and re-calibrate. This may
sometimes happen because of negative current, i.e., current coming out of the input terminals
instead of into the input terminals turbine breaker. A new voc is also acquired during a Re-Cal.
Troubleshooting Guide
MPPT does not boot/power-up
1. Check battery connection and polarity. Reverse polarity or improper connection will cause
power-up issues.
2. Is the battery voltage greater than 10.5v? (Measure the battery-side of 4 Position Terminal
block)
A battery voltage less than 10.5v may not power up the MPPT.
MPPT is inactive
1. Is battery voltage greater than the absorb voltage set point (compensated absorb voltage)? If
yes, the MPPT will not wake up since the battery voltage is at/above the absorb target voltage set
point.
2. Is the Turbines voltage greater than the battery voltage by at least 2 volts?
The output voltage has to be at least 2 volts greater than the battery voltage for the initial
wakeup.
3. Check the turbines breaker (or fuse) ensure that the turbines breaker (or fuse) is sized
appropriately.
MPPT not producing expected power
1. Are wind conditions optimal?
Wind turbines in locations with constantly high wind speeds bring best return on investment.
The primary consideration in a wind generator is the average wind speed at the installation site. A
different turbine will give optimum performance at a site with average wind speeds below 15mph
than one at a site with speeds in the low 20mph range.
2. Are the batteries charged? Is the MPPT in the absorbing or float stage?
If so, the MPPT will produce enough power to regulate the voltage at the absorption or float set
point voltage, therefore, requiring less power in these modes.
3. What is the short circuit current of the wind turbine? Use a multimeter to determine if a short
circuit current is as expected. There might be a loose/faulty wire connection.
4. Is the turbine's voltage close to the battery voltage?
If so, the panels could be warm/hot causing the Maximum Power Point of the array to be at or
lower than the battery voltage.
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