Most Louisiana homeowners pay somewhere around $7,000 to $18,000 for a professionally installed whole-home standby generator. Smaller units that back up only essential circuits can cost less; large homes with high electrical loads can cost more. Treat any single number you see online as a starting point, not a quote.
What drives the price
- Generator size (kW). A unit that runs a few circuits is far cheaper than one sized to run central air, an electric range, and a well pump at the same time.
- Transfer switch. A whole-house automatic transfer switch costs more than a smaller essential-circuits switch, and some homes need load-management modules.
- Fuel line. The distance from your gas meter (or a new propane tank) to the generator pad matters. Long runs or meter upgrades add cost.
- Electrical work. Older panels may need upgrading before a generator can be connected safely.
- Site prep and permits. Concrete or composite pads, elevation in flood-prone areas, and parish permit and inspection fees.
How to get an accurate number
Ask at least two or three installers for an on-site load calculation and a written, itemized quote. Make sure each quote includes the transfer switch, fuel connection, pad, permits, and startup/registration — otherwise you're not comparing like for like.
Ongoing costs
Budget for annual maintenance (oil, filters, battery checks), and remember the unit exercises itself weekly, which uses a small amount of fuel. Many installers offer maintenance plans.