Inverter Features
2 Prosine 2.5/3.0 Installation & Operation Guide
Battery Temperature Shut Down When using the battery-temperature sensor, the charger will shut
down if it detects excessively high or low battery temperatures. If battery temperature exceeds 50°C
(122°F), or falls below -15°C (5°F), the charger will shut down.
Adjustable Maximum AC Input Current This feature protects against nuisance tripping of AC
circuit breakers on the utility or generator AC supply. You can set the maximum AC input current to 8,
12, 16, or 24 amps to prevent 10, 15, 20, and 30-amp (respectively) circuit breakers from
unnecessarily tripping as AC load demands approach their current rating. You can set the maximum
AC input current in one (1) amp increments using the ACS control panel. The Prosine automatically
reduces its charging current to attempt to keep the sum of all loads from exceeding this setting. The
Prosine has no control over the loads you apply, so if nuisance-tripping still occurs, try removing one
or more of your AC loads.
Inverter Features
Automatic Transfer Switch When utility AC power fails or is disconnected from the unit, or falls
below 90 volts, the Prosine will automatically begin inverting and provide AC power from your
batteries within 20 milliseconds; fast enough to keep a computer running. When utility AC is restored,
the inverter will sample the AC power for about 8 seconds, synchronize to the AC waveform, and
automatically switch your loads to utility power. It also returns to charging the batteries.
Automatic Waveform Regulation The Prosine inverter/charger monitors and regulates the AC
waveform when inverting, delivering a true sinewave with typically only 1% total harmonic distortion
(THD). This is usually cleaner than generator and utility waveforms.
High Surge Capacity The Prosine inverter will deliver up to 4000 watts of power for up to five
seconds to start large motors and other inductive loads that require high power levels to start. The
Prosine 2.5 will deliver 2500 watts (21-amps RMS) continuously, while the Prosine 3.0 delivers up to
3000 watts (25-amps RMS) continuously.
Load Sense Prosine inverters reduce power consumption during idle periods to conserve battery
capacity by “searching” for loads that exceed a specified threshold. When a load is detected, the
inverter ‘turns-on’ and delivers full voltage. When no load is detected, the inverter ‘stands-by,’
consuming less than three watts of power. The threshold can be set at 10, 25, or 50 watts (10 to 1401
watts using the ACS Control Panel), or disabled by setting it to zero (0).
Integral Protective Circuitry All Prosine inverter/chargers feature built-in protective circuitry that
guards against damage to the inverter and your AC equipment due to high battery voltage, low battery
voltage, AC overload, and high temperature conditions. This protective circuitry includes:
Automatic Low Battery Shut Down The Prosine inverter protects your batteries from damage by
over-discharge by shutting down when battery voltage drops to 10.00 volts for 12-volt units, and 20
volts for 24-volt units. The unit will resume inverting when battery voltage exceeds 12.3 volts for 12-
volt models, and 24.6-volts for 24-volt models.
Automatic High Battery Shut Down The Prosine inverter/charger protects itself from damage from
excessive battery voltages by shutting down when battery voltage reaches 16-volts for 12-volt units,
and 32-volts for 24-volt units. When battery voltage falls to 15.5-volts for 12-volt units, and 31-volts
for 24-volt units, the unit will automatically restart.