Florida homeowners understand the necessity of access to a generator to keep their families comfortable during outages. When considering a generator, there are two types of generators to choose from - a portable generator, and a standby generator (permanently installed). While both options come with a host of pros and cons (check out our blog post, How to Choose the Right Sized Generator, to learn more about portable generators), a standby generator is definitely the most convenient option. However, installing a whole house standby generator is a significant investment, and understanding the various costs involved can help you plan your budget effectively. Below is a detailed guide to the key components and associated costs, giving you a realistic estimate of the total expense.
The information provided is meant to give you a general idea of pricing - you will need a quote to provide specific costs for your project.
1. Generator Costs
- Generator Unit: The cost of the generator itself varies depending on size and power output.
- Small generators (7-10 kW): $2,500–$5,000
- Medium generators (12-20 kW): $5,000–$7,500
- Large generators (22-30 kW): $7,500–$15,000
2. Installation Costs
- Electrical Installation:
- Includes wiring, connecting the transfer switch, and integrating with the home’s electrical system.
- $2,000–$5,000
- Transfer Switch:
- Manual switch: $500–$1,000
- Automatic transfer switch (ATS): $1,500–$3,000
3. Site Preparation Costs
- Pouring a Concrete Pad:
- A sturdy foundation is required for mounting the generator. Costs vary based on the size and complexity of the pad.
- $500–$1,500
- Grading and Landscaping Adjustments:
- Necessary for uneven or sloped yards.
- $500–$2,000
4. Fuel Source Installation
- Propane Tank Installation:
- If using propane as a fuel source, you’ll need a tank installed. The size depends on your generator and power needs.
- Small (100–250 gallons): $500–$1,000
- Large (500–1,000 gallons): $1,500–$3,500
- Additional Costs: Includes running gas lines to the generator and permits.
- Gas line installation: $500–$2,000
- Permit fees: $100–$500
- Natural Gas Connection:
- If connecting to an existing natural gas line, costs can range from $500–$2,000, depending on distance and local utility requirements.
5. Miscellaneous Costs
- Battery Backup:
- Standby generators often require a dedicated battery for automatic start.
- $200–$500
- Weatherproof Housing:
- Many generators come with enclosures, but premium weatherproof covers or enclosures may cost extra.
- $500–$1,000
- Permits and Inspections:
- Most municipalities require permits and inspections for generator installation.
- $100–$500
6. Maintenance and Operational Costs
- Routine Maintenance:
- Annual service, including oil changes, filter replacements, and system checks.
- $200–$500 per year
- Fuel Costs:
- Propane and diesel generators require a steady fuel supply, which adds to operational costs.
- Propane: $3–$5 per gallon
- Diesel: $3–$6 per gallon
- Extended Warranties (Optional):
- Many manufacturers offer extended warranties for added peace of mind.
- $300–$1,000
Total Cost Estimate
Adding up the costs, here’s a rough estimate for a whole house generator installation:
| Component |
Low Estimate |
High Estimate |
| Generator Unit |
$5,000 |
$15,000 |
| Installation |
$2,500 |
$5,000 |
| Concrete Pad |
$500 |
$1,500 |
| Propane Tank & Installation |
$1,000 |
$5,000 |
| Electrical Setup (Transfer Switch, etc.) |
$2,000 |
$5,000 |
| Permits & Miscellaneous Fees |
$500 |
$2,000 |
| Total Estimated Cost |
$11,500 |
$33,500 |
Tips to Manage Costs
- Compare Quotes: Get multiple quotes from licensed contractors to find the best price.
- Consider a Smaller Generator: If full-house coverage isn’t necessary, a portable generator can save money.
- Check for Incentives: Some states offer rebates or tax incentives for installing standby generators.
Before choosing a stand-by generator, check with your HOA to determine if you will need approval for installation, if applicable.
Investing in a standby generator provides peace of mind during power outages, and while the upfront cost is substantial, the benefits of reliability and comfort make it a worthwhile addition to your home.