Classic Manual Rev L
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HyperVOC ™
HyperVOC is a unique Classic feature. HyperVOC refers to when the DC input voltage rises above the
maximum operating voltage (150V, 200V, 250V, depending on the Classic model). HyperVOC gives
you the flexibility to go up to the maximum operating voltage PLUS the nominal battery voltage. For
example, the Classic 150 has an input voltage rating of 150 operating volts; if the Classic 150 is
connected to a 48V battery bank, the HyperVOC voltage limit will be: 150V + 48V for a total of 198V
that the Classic can withstand without damage. When the Classic input voltage rises above 150V it
will switch off (stop outputting power). As long as the Classic is in HyperVOC mode, the
microprocessor and all other functions like AUX will continue running. When the input voltage
comes back down below 150V (or the rated operating voltage of the Classic, depending on model)
the Classic will wake up and start charging again automatically. This could happen in a really cold
morning with a system that has a Voc (open circuit voltage) close to the maximum operating input
voltage.
NOTE: A HyperVOC message will be displayed on the bottom right side of the Status screen.
NOTE: The maximum nominal battery voltage to be added is 48V.
HyperVOC can be useful in overcoming an industry shortcoming in charging 48V batteries with
standard panels. For example, let’s take a sample system with Solar World 165s that have a Voc of
44.1V. The industry has limited us to two of these panels in series making it hard to charge a 48V
battery on hot summer days. With the Classic we designed in Hyper VOC to allow you to run three of
these in series. Three panels at 44.1V will give you a total Voc of 132.3V. When temperature
compensated for cold climates to 125%, Voc rises to 165V. This is above the maximum safe limits
for most controllers but falls well into the HyperVOC range of the Classic.
NOTE: Use HyperVOC wisely though; if you abuse it, the Classic will never wake up in cold weather.
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