Firman Backup Power

The Costco tri-fuel that made natural-gas backup a thousand-dollar proposition. The T07571 runs 7,500 watts on gasoline, 6,750 on propane, and 5,500 on natural gas, ships with both LP and NG hoses in the box, and has a 50-amp outlet — which is why r/Generator treats it as the default budget answer to 'I want to hook a portable to my gas meter.' Owners praise the honest hardware: electric start, 8-gallon tank, sturdy 213-lb frame, and a 3-year warranty that beats Predator's 90 days. The recurring complaints: Firman customer service is slow — weeks-long waits for warranty parts are the most common thread — NG output is a real 27% derate, it's a loud 74 dB open frame, and low NG line pressure causes surging just like every NG portable. Costco's return policy is frequently cited as the real warranty.