Here is an example. The power we are trying to save is the amps along the green line. During the day the system is consuming an average 4 amps. The higher spikes is the oil heater making hot water. If the system was turned off during idle periods, we could be conserving amp hours to stretch into our third day.
4 amps? This isn't 4 amps at 120V but 24V. Our phantom load is 96W or less than 1 amp at 120V (roughly 0.8 amps at 120V). So, at idle times we have a 100W light bulb on all the time. If we shut the house down, the inverter will consume much less.