How many amps does this stereo amp use per hour??

No refrigerator. No lights. Hmmm. Theoretical 100 watts for x hours. Doesn't take a Cray computer to assume there's gonna be a blackout tonight. Amplifiers are measured by output no input wattage.

A candlelit campsite seems to always begin with the immortal "But I'm only gonna..."

Personally I wouldn't offer a -guess- at this for love nor money. Stereo power consumption needs to be determined beforehand in a driveway not at a campsite.