Well I have to pedal about 20 minutes to put back in the
75 amp/hr. SLA 12 volt that's 10 watt/hrs. the beauty of
it...like you say very efficient I can almost power it direct
almost....probably could if I had a variable speed drive....
but I'm satisfied the way it is by pedal helping the battery
I can have a cup of coffee in 10 minutes as the voltage to
the coffee maker is higher....higher = faster brew. But it is
really quite causual pedaling....in fact I can sip on the coffee
while I pedal the second 10 minutes of the 20 minute session.
Just hooked up to the battery....battery reading 12.5 and drops to 12
when I turn on the switch coffee maker draws 7.96 amps.
It is a really efficient PMA....I figure 30 watts leisure pedaling
for a cup of coffee ain't bad at all