Does Your Inverter "Track"?
From day whatever low voltage limit may be As battery voltage increases output AC voltage similarly increases?
Forum Discussion
All of the modern inverters I know of regulate the RMS output to be relatively constant over their spec'd range of DC voltage input. The high voltage input to the actual inverter circuitry is proportional to the DC input voltage (i.e. not regulated). The inverter regulates the AC output voltage using PWM. In a PSW inverter, the pulses are behind a filter which smooths them into a sine wave. So the changes in the pulses, due to DC input variations, are not seen in the AC output. MSW inverters use the same technique, but with only 2 pulses per AC cycle and no filter, the output waveform changes with the DC input voltage while retaining a constant RMS value. With a high DC input voltage, the output pulses are shorter width at a higher voltage. As the DC input voltage goes down, the output pulses trend to a lower voltage and greater width as the RMS value remains constant. Some loads "don't care" about the changing waveform, others do. Most microwave ovens and some DC power supplies are highly dependent on the peak voltage and their performance will change when driven by a MSW inverter as the DC input voltage changes.
