What size generator is needed to power (if need be) a 3 h.p. well pump, a 1/2 h.p. cistern pump, two 16 cu ft upright freezers, and a 16 cu ft fridge in the workshop?
The 3 hp pump full load amperage should be 230 V 3910 VA x 125% since this is the largest motor 4887.5 VA.
The 1/2 HP would normally be 115 V 1176 VA.
3 refrigerators / freezer total 4320 VA for a total of 10,383 VA. I may be a bit over on the fridge/freezer size since I used 80% of 15 amp x 3.
I would not go lower than a system that had a peak rating of 10 kW but a continuous wattage closer to 7.5 kW should work.
Watch out. Some generators list their peak rated value and some list continuous rating trying to make a smaller unit look like a deal.
I have a 8.5/13? (peak/continuous kW) that runs 2 wells (3 hp & 1.5 hp both 230 V) 2 fridge/freezers, all the lighting in the house and barn and power to run the wood stove fan with some reserve.