*The Angi rating for Generator Install companies in Lathrop, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.
*The HomeAdvisor rating for Generator Install companies in Lathrop, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.
Last update on December 22, 2025
Serving Lathrop, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2003
Free estimates
Emergency services offered
"Transfer switch for generator installed"
+21
Serving Lathrop, CA and surrounding areas
Approved
In business since 2002
Free estimates
Warranties offered
"Quick trouble-shooter. Found the problem with my swimming pool lights and fixed it on the spot. Great work! Would hire him again in a heartbeat!"
Serving Lathrop, CA and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"Excellent. Huft installed my new Goodman HVAC system a few years ago and maintains it consistently."
+19
Serving Lathrop, CA and surrounding areas
Approved
In business since 2024
Free estimates
Emergency services offered
"Sparky?s Electric did an excellent job installing my EV charger. They were professional, knowledgeable, and showed up when they said they would. The installation was clean, everything was explained clearly, and they made sure everything was working properly before leaving. Pricing was fair and the quality of work was top notch. I would definitely recommend Sparky?s Electric to anyone looking for electrical work or EV charger installation."
Serving Lathrop, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Free estimates
Credit card accepted
"Just had them come and install some can lighting in my hall way that I wanted for some time now. They were able to remove my old fixture in the hall and install 4 new LED can lights, even installed the dimmer I wanted with it. Much appreciated!"
Serving Lathrop, CA and surrounding areas
Approved
In business since 2019
Free estimates
Emergency services offered
"I have used the electric company for several jobs, and they have always been professional, efficient, and great to work with. From installing an exhaust fan to a whole new panel no job is too small or too big for them."
Serving Lathrop, CA and surrounding areas
Approved
In business since 2021
Free estimates
Warranties offered
"I will definitely use Santiago Electric Inc again for my Electrical Jobs. I highly recommend them. They were on time, professional, knowledgeable and worked fast. They explained everything they were doing throughout the repair job. T. Gonzales"
Serving Lathrop, CA and surrounding areas
Approved
In business since 2022
Free estimates
Credit card accepted
"We hired ricky to install our security cameras and doorbell camera . He was very professional on time and tentative to our needs . He set up the cameras exactly where we wanted them. even places we were told couldnâ t be done bye previous inquiries. Very happy with the work it was definitely worth the money spent . Will definitely work with him again ."
Serving Lathrop, CA and surrounding areas
Approved
In business since 2000
Free estimates
Emergency services offered
"No complaints here would hire them again for future projects"
+2
Serving Lathrop, CA and surrounding areas
Approved
In business since 2021
Free estimates
Emergency services offered
"I had many things I needed upgraded around my house. I feel they were a bit ambitious with the time frame thinking everything could get done in one day. They had to come back the next day to finish up. They did a fantastic job with everything and didnâ t have any problem when my wife wanted a few more fixtures installed. Really good guys that do professional work. Price was lower than other bids I had as well."
+14
When maintained properly, a whole-house generator can last up to 20 years. Costs to maintain and repair generators vary by location and type of generator, but you can expect to pay about $150 to $300 per year for annual generator maintenance checks. An experienced generator service technician will inspect your generator’s engine filter, starting mechanism, fuel, lubrication, and coolant levels to keep your generator in good working condition for as long as possible.
Installing a whole-house generator costs about $5,000 on average. Prices range from $1,550 to $8,500, depending on size, brand, fuel type, and assembly. The size of your whole-house generator is the most significant cost factor, with large homes with high energy demands costing the most to power. Types of whole-home generators include:
Portable generators with 1kW–7.5kW capacity: $500–$2,000
Partial generators with 9kW–20kW capacity: $2,000–$6,300
Whole-house generators with 22kW–48kW: $5,000–$18,000
When choosing the right size generator for your needs, consider a few items to help calculate the wattage you’ll need. Start by determining which household items and appliances you want to power, and then add the wattages together. Check out the wattage of these essential appliances:
Refrigerator: 600 watts
Large dehumidifier: 700 watts
Large window air conditioner: 1,400 watts
Water heater: 3,000 watts
Running home appliances like these requires a partial or whole-house generator. A portable generator may be enough to power your home if you only plan to keep a refrigerator and freezer running.
Here’s what you can run with different wattages and types of generators:
Portable generator:
2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers.
4,000 watts will keep two large appliances operating and a few smaller devices.
8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.
Partial to whole-house generator:
20,000 watts and above will make it seem like your home’s power is still on.
The value of installing a whole-house generator is that your home has guaranteed power, even if the power grid in your area is down. Whether a whole-house generator is worth installing in your home depends on how often you use it, your home’s location, and your lifestyle. For example, installing a whole-house generator is likely worth it if you:
Experience frequent or prolonged power outages
Work from home
Store a lot of cold food
Have a sump pump
Have a pump for well water
Use electronic medical devices
Live in a climate requiring heating or cooling
From average costs to expert advice, get all the answers you need to get your job done.
The cost to install a generator transfer switch depends on several factors. Our guide will help you understand all of the costs.
The average cost of a whole-house generator falls between $5,000 and $25,000. Keep reading to learn how much you can expect to spend.
Natural gas generators are whole-home standby generators that are connected to your home’s natural gas line. The average cost for a natural gas generator is $12,000.
Using a generator during a power outage is a lifesaver. Our guide will show you how to connect a generator to your house without a transfer switch.
Traditional and inverter generators can provide off-grid or emergency power. Learn the pros and cons of a traditional generator vs. inverter generator.
Wondering who to hire to install a generator? Consult this guide to learn who to hire to install a generator or a transfer switch.
