
Renting a diesel generator in San Diego in 2026 typically costs between $150–$300 per day, $600–$1,200 per week, and $1,800–$3,500 per month. These rates vary based on the generator's power capacity and additional features. Leading rental companies in San Diego provide a wide range of options suitable for various industrial applications.
| Vendor | Daily Rate | Weekly Rate | Review Score | Website |
|---|---|---|---|---|
| Sunbelt Rentals | $180–$350 | $540–$1 050 | 8 | Visit |
| United Rentals | $180–$350 | $540–$1 050 | 8 | Visit |
| Bj's Rentals, Inc. | $116 | $292 | 7 | Visit |
| Coast Equipment Rentals | $150 | $487 | 7 | Visit |
Several factors affect the rental costs of diesel generators, including the power output, duration of hire, and any additional services such as delivery and setup. Seasonal demand can also impact pricing, with higher rates during peak construction periods.
When renting a diesel generator, be aware of potential hidden fees. These may include delivery and pick-up charges, which can be flat rates or based on mileage. Fuel surcharges, damage waivers, and cleaning fees for excessive dirt or mud are also common. Late-return penalties and overtime usage fees should be considered when planning your rental.

The diesel generator rental market in San Diego is expected to grow steadily in 2026, driven by increased construction and infrastructure projects. Companies are investing in more efficient and environmentally friendly models to meet regulatory standards and customer demand.
Ensure that any rented diesel generator complies with local emissions regulations. San Diego has specific requirements to reduce environmental impact, and rental companies typically provide equipment that meets these standards.
When planning a portable generator hire in San Diego, consider the specific power requirements and duration of your project. It's crucial to coordinate delivery and pickup times to align with your project schedule, ensuring minimal downtime. Evaluate the need for additional accessories, such as cables or transfer switches, to enhance efficiency. Proper staging and access for the generator can streamline setup and operation, while understanding the cleanup and return conditions will help avoid unexpected charges.
Tip: Schedule generator delivery during off-peak hours to avoid traffic delays and ensure timely setup.