Search “best whole-house generator” and you’ll drown in listicles ranking models you’ve never heard of. Here’s the honest truth: there’s no single best generator, there’s the best one for your home, your fuel, and your budget. A 26 kW unit that’s perfect for a big house in Lafayette is overkill (and a waste of money) for a tight shotgun in New Orleans. This guide walks the decisions that actually determine the right unit.
1. Size it to your home first
This is the decision everything else hangs on. Too small and it trips offline when your AC kicks on mid-storm; too big and you’ve overpaid. It comes down to a real load calculation, not a guess, and in our climate the air-conditioning surge is the deciding factor. Most South Louisiana homes land around 22 to 26 kW for whole-home coverage, or a smaller managed system that sheds load intelligently. Full breakdown: How to Size a Home Standby Generator.
2. Pick your fuel
Natural gas (off your utility line, no tank, no refills) or propane (on-site tank, independent of the gas grid). What’s available at your address usually decides it. See Natural Gas vs Propane. Fuel also slightly affects the unit’s output, which loops back into sizing.
3. Air-cooled vs. liquid-cooled
- Air-cooled (roughly up to ~24 to 26 kW) covers most homes and costs less.
- Liquid-cooled (27 kW and up) is built for larger homes, multiple AC systems, and long, hard runtimes, the kind a multi-day hurricane outage demands.
4. The brands, honestly
The major residential names, Generac, Kohler, Cummins, Briggs & Stratton, all make reliable units; Generac has the largest dealer and parts network in the U.S., which matters for fast service after a regional storm. We don’t publish “rankings” or star ratings (we’d have no legitimate basis for them). What matters more than the badge is whether your installer is certified for that brand and can service it locally when you need parts.
5. Features worth paying for
- Load management, lets a smaller generator power more of your home (see transfer switches).
- Wi-Fi / mobile monitoring, tells you it self-tested and is healthy, so you’re not finding out it’s dead during an outage.
- Warranty, 5-year coverage is common; confirm what’s parts vs. labor.
- Sound level, worth checking on tight lots where the unit sits near a window or a neighbor.
6. The installer matters more than the model
A great generator installed poorly, wrong size, bad fuel hookup, no permit, sitting below your flood elevation, will fail you when it counts. In South Louisiana, the quality and locality of the install (correct sizing, code-compliant transfer switch, proper flood-elevated pad, someone who’ll answer after a storm) is the real differentiator.
The honest shortcut
The fastest way to the right unit isn’t a listicle, it’s a free in-home assessment where a local pro measures your actual loads, checks your fuel, and recommends a specific size and configuration for your home. That’s exactly what we connect you with.
Next steps
- How to Size a Home Standby Generator · Natural Gas vs Propane
- Get matched with a local installer for a free quote, find your city.