Vlangel- read up on modified & pure sine waves. Most generators use alternators and I could never get a straight answer from anyone if they produce pure or modified sine waves. So before we bought ours, HD agreed that I could return it if it would not run our aquarium equipment which includes the lights as there seems to be problems with modified sine waves and balasts. Anyway our gen runs everything with no problems. We run our computers and tv etc. With our gen (anything that's connected to the pre selected circuits), no problem, however, the PC's are on a battery back up which also "conditions" electric. From what I remember reading modified sine waves cause interference with sensitive equipment such as LCD tvs etc.
As mentioned make sure the generator you purchase is large enough to handle your load in watts. Also, a generator is rated by running watts & surge watts. Most appliances don't show watts.
A quick way to figure out watts on the chiller ( or anything) is look on the tag/plate
Volts X Amps = Watts
Ex: 120 volts X 8.5amps = 1020 watts
Some motors such as a chiller can use up to 3 times the running watts when started (surge).
Hope this helps