Don't just grab the biggest unit. Calculate your total watts so you don't...

https://www.4shared.com/office/q7FXWSwGfa/pdf-3040-30739.html

Don't just grab the biggest unit. Calculate your total watts so you don't overload it, choose fuel that matches your runtime needs, and mind the noise if you’re in a quiet street. Always check for an RCD safety switch to prevent shocks