Mark, Thanks you for the correction. My math was for 12V rather than 24. So hopefully the following is correct:
If your SM is equipped with 8 12V, 110Ah batteries and you are drawing 0.1 Amps continuously at 24V then theoretically it would take 73 days, 8 hours to run your batteries down to 60% charged.
If you were drawing 0.2A at 24V then it would be half of that, 36 days, 16 hours hours.
For the 12 battery "comfort pak" model it would be 110 days and 55 days, respectively.
8 X 110 = 880 Total Ah at 12V
880/2 = 440Ah at 24V
440 X 40% = 176 Usable Ah
176/0.1 = 1760 hours available at 0.1A draw
1760/24 = 73.33 Days
Hope that helps, or is at least mildly interesting trivia,
SM384 Sirena Azul