Classic Manual Rev L
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Configuring DC Input Source
To select the Classic’s mode of operation, follow the steps below:
Depress the MAIN MENU key.
Scroll left or right until MODE is highlighted, depress ENTER.
Scroll to the right and highlight the current mode, then use the UP and DOWN ARROW
keys to set the mode you want.
Take note of the RIGHT SOFT key - most modes have some set points that can be adjusted.
Depress MAIN MENU until you get back to the MODE menu.
Set the ON/OFF to ON and depress ENTER.
The following modes will appear in this order in the MODE menu:
Micro Hydro
This mode is intended for use with hydro systems and can be used with other sources as
well. When the Classic first turns on after the input voltage goes above battery voltage, it will
sweep from that open circuit voltage down to battery voltage, finding the maximum power
point voltage (MPP Voltage). Then it will return to that newly found voltage. After the
original turn-on sweep, the Classic will do mini sweeps at user adjustable time intervals. If
the time interval is set to 0, the Classic will not do any mini sweeps but will stay on this first
found MPP V until the user goes to the mode menu and turns it off and back on again.
Micro Hydro mode sweeps slightly slower than Solar mode and has two user adjustable
settings. Sweep Interval is the time between mini-sweeps, in minutes, and sweeps around the
present (i.e., the last found) MPP Voltage. The range of this sweep is determined by the
Sweep Depth user adjustment and is expressed as a percentage of Watts that the sweep
started from. For example, if in Micro Hydro mode, the Classic was outputting 1000W and
the Sweep Depth percentage was set for 20%, (20% of 1000W = 200W), the sweep will bring
the input voltage DOWN until the output power drops down to 800 Watts, then will sweep UP
in voltage until the power drops again down to 800 Watts and then go back to the newly
found MPP Voltage, waiting for the next sweep.
Solar
This is the default mode for PV systems and has a very fast sweep (typically 1/2 second or
less) that will re-sweep at user adjustable sweep intervals, unless the Classic finds that it
needs to do a sweep on its own because of changing conditions. The timed sweep interval is
user adjustable and is in units of minutes. SOLAR mode is typically best for PV systems,
especially if there is partial shading at times during the day. SOLAR mode is best suited for
shaded or un-shaded PV arrays that are at least one nominal voltage above the actual battery
voltage. For severe partial shading or PV arrays with nominal voltage equal to battery
voltage, you may want to try Legacy P&O (Perturb and Observe) MPPT mode.
Legacy P&O
Legacy P&O (Perturb and Observe) mode is a slow tracking mode similar to the Micro Hydro
mode but it is slightly faster and will shut off if the power source goes off.
It has two settings that are user adjustable. Sweep Interval is the time between mini-sweeps,
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