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Electric coffee makers are possible, but are best used when connected to shore power.
They use a surprising amount of power, particularly for boondockers:
Small drip | pod | |
avg watts | 740 | 1200 |
inverter ineff. | 74 | 120 |
total watts | 814 | 1320 |
Amps (W/13) | 62.6 | 101.5 |
Ah per 5min use | 5.2 | 8.5 |
To compound the problem, coffee is usually brewed in the early morning when batteries are most deeply discharged. This early morning load is bad enough for an MPPT-charged system but it hamstrings a PWM-charged system.