The answer to 'how much is generator upgrade' is that the cost can vary significantly depending on several factors. Generator upgrades typically range from a few hundred dollars for a basic model to several thousand dollars for a high-capacity, whole-home system. The primary factors that influence the cost include the size and power output of the generator, the complexity of the installation, any necessary electrical work, and the brand and quality of the equipment.
In general, smaller portable or standby generators for a single appliance or small home can start around $500-$1,500. Larger, whole-home backup generators are usually $3,000-$8,000 or more, not including installation. The installation itself can add another $1,000-$3,000 or more depending on the complexity. It's essential to get local quotes from licensed electricians to determine the exact cost for your specific needs and location.