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OutBack Power Systems Inc.
Wakeup As the PV open circuit voltage (Voc) rises above the battery system voltage by two volts,
the MX60 prepares to deliver power to the batteries. During this period, the MX60 is calculating
the pulse width modulation (PWM) duty cycles, turning on power supply voltages in the proper
sequences, and making internal calibrations. At wakeup, the MX60 closes its relays and then starts
sweeping the input voltage (the “initial” sweep) towards the battery voltage. At dawn and dusk this
may happen many times until there is (or is not) enough power from the PV array to keep going.
Wakeup is also a time when the MX60 acquires a new Voc.
Zzzz... At night (3 hours of Sleeping) the MX60 will display Zzzz... until the next wakeup. At the next
wakeup, (usually the next morning), the daily statistics, (AmpHours, KWh, etc.), will accumulate into
the total statistics and then the displayed daily statistics will clear. A Bulk charge will automatically
initiate at the next Wakeup.