Guitarguy, my boat runs on 12 volt DC so I divide watts by 12V to get amps, not 110V as you would for shore power. Do I assume correctly that these stoves only work on 110VAC? Then I would also have to calculate the loss going through the inverter. Is there an induction oven too? What is the efficiency of that unit?
Ok George... I only have one induction stove and no oven.
Here is how I see it at the battery... 1500 watts into the battery is 150 amps per hour... 150 amp/hr... so 150 amps/60 minutes= 2.5 amp/minute so 5 minutes equals 12.5 amps multiplied by 12 volts = 150 watts... 10 minutes gives you 300 watts... this not including inverter efficiency or factor which would alter the above.
The stove of course is 110 vac... loss though the inverter may be .5 amps +/-
Point being is the wattage and battery usage is not what many people think.. I have two batteries in the boat to handle this power and they weren't cheap.
I used this stove throughout my cruising while using the boat... not like I was cooking 4 times a day! I had no problem with of discharging the batteries and the solar panel had no problem topping off the use... I wouldn't take the boat across an ocean using this method of cooking on this size of a boat but for coastal cruising as I did up in Puget Sound I had no issues.
A larger solar panel and cruising outside of Puget Sound with many sunny days and the stove could be used for more than 5-10 minutes...
Alex... I think you need to check out the calculator to see that time component in minutes!