The boat is 2000 miles away and the caretaker sent me a photo of the ColorControl GX monitor.
After a month on only solar charging, in the tropics, with adequate sun, the color control GX battery icon is solid green and shows 0%. The voltage indicated on the battery icon is 13.0V and the amps are -4A. The PV icon shows 182W from the Victron-monitored array. It is reasonable to assume the other array (see below) is producing about the same.
Hardware: 2 solar arrays, each about 200W. One is controlled by a non-Victron MPPT (Blue Sky) and the other by Victron Blue Solar MPPT 150-70. SOC is monitored with BMV700 and Color Control GX.
How do I interpret that "0%" battery SOC? It seems unlikely that with plenty of sun and essentially no load the battery is not charging. Is it likely that the BMV700 has failed to synchronize every day for a month?
Further, I think the color of the battery icon contradicts the 0% SOC. Doesn't the color of the battery icon usually change from all green to white-over-green in proportion as the battery discharges?
Ideally, I'd have an early morning, before-solar-charging-starts, battery voltage reading to infer the SOC, but it is hard to persuade the caretaker to look at the boat in the morning twilight hours. Can anyone deduce the SOC from the above information?
