how I test and evaluate everything on this site

I don't recommend anything I haven't either run myself or researched until I could argue with the engineer who designed it. Here's what that process looks like.

hands-on testing

For products I have physical access to — which is most of what I recommend — I run them. Not for an afternoon. For weeks or months. I connect them to real loads. I run them in weather. I measure actual output against rated specs. I track fuel consumption, noise levels, startup reliability, and runtime under load.

I'm not a lab. I don't have calibrated testing equipment (though I have a Kill-A-Watt and a decent clamp meter). What I have is a property that actually runs on this stuff. When I say a generator handles a 30-amp well pump startup without stumbling, it's because I watched it happen. When I say a battery system can't actually run a full-size refrigerator for 24 hours like the marketing claims, it's because I tested it and it died at 16.

spec verification

Manufacturers lie. Not always. Not maliciously, usually. But they test in ideal conditions and report peak numbers. A generator rated at 22kW produces that at sea level, at 77°F, with clean fuel and a fresh air filter. Your conditions are not those conditions.

I derate everything. I look at running watts, not peak watts. I look at continuous output, not surge capacity. I compare manufacturer specs against independent testing where it exists, and against real-world owner reports where it doesn't.

installer and owner feedback

I spend time on electrician forums, contractor communities, and owner groups. The people who install and live with these products every day know things the manufacturers don't publish. Which models have chronic warranty issues. Which transfer switches fail after three years. Which brands have parts availability problems. Which installers are pushing specific brands because of margin, not quality.

This is unglamorous research but it's the most valuable. A product with great specs and a 40% warranty claim rate is a bad product. You won't find that in the brochure.

what disqualifies a product

• Misleading specs. If I catch a manufacturer significantly overstating performance or understating limitations, the product is out. I don't care how good it is otherwise.
• Reliability patterns. One bad unit is a lemon. Consistent failure reports across multiple owners is a design problem.
• Parts and service. A generator that works great until it needs a part that's backordered for four months is not a generator I'll recommend. Backup power is useless if it can't be maintained.
• Warranty games. Companies that deny reasonable warranty claims or make the process deliberately difficult get flagged. Your generator failing during an ice storm is exactly when you need support to work.

what I don't do

• I don't accept paid placements or sponsored reviews.
• I don't let manufacturers review content before publication.
• I don't adjust ratings based on affiliate commission rates.
• I don't recommend products I wouldn't install at my own property.