pet resort generator

[ceb58]

I need some help/ advise on sizing a generator for a pet resort. Information I have is they used 118,172 KwH in a 12 month period now with that said my calculations come up to a average of 56 amps per hr.
118172 * 1000 / 240v * 8760 hrs per year
Now my question is how much larger should I go. The building has 3 - 5 ton A/C units with 3 - 10Kw heat strips in each air handler and a 4 ton A/C with 10 Kw heat strips. My concern is the start up of the A/C units although I know they all will not try to start at one time but being overly cautious.

 

[Jraef]

Something is off worth your math…
118172 kWh is a LOT of energy, that’s 118 MEGA watt-hours, enough to power around 150 homes for a YEAR!

Regardless, extracting demand from annual keg use is fraught with problems. Theoretically, 118MWh could be 118 MW for one hour, then zero for the rest of the year, or it could be 9.8MWh per month. So even if it is averaging 9.8MWh per month, that could be 327kWh per day, or 500kWh on some days and 100kWh on others, meaning you have to be ready for the 500kWh days! And even then, that could be 16kW every hour, or 12kW per hour for 23 hours and 1 hour where it’s 100kW, in which case you have to be ready for the 100kW hour. See the problem?

Ask your utility for a peak demand value, they should have that if it’s a commercial business, even if they don’t charge the customer a peak demand charge.

 

[curt swartz]

The KWH over a year is 100% useless for any load calculation.