The picture is of our electrical panel. The point-in-time amp draw is in the middle at the top (19.3amps). This is marked negative since it's drawing out, not being put back in. To the left of that is the current voltage level. When it drops much below 12v it's time to charge the batteries. Since the sun has just come up, if I can delay turning the engine on, the solar panels will gradually charge the batteries through the day as they generate enough power to supply our average consumption plus a little more for battery charge. This is generally effective from about 9am to 4pm, but only if we can keep the mainsail out of the way so it doesn't cast a shadow on the panels. In my prior picture from the top of the mast you can clearly see the placement of the panels.
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