Your trusted local Authorized KOHLER Dealer in New Hampshire
Get a free in-home consultation and a no-obligation quote.

How We Work Together
From your first inquiry to final installation, we're here to make the process simple and stress-free. Here's what you can expect:
1. Free Home Consultation
We'll schedule a site visit to review your home's layout and power needs.
2. No-Obligation Quote
We'll recommend the right generator size, review installation requirements such as placement, fuel source, and permits, and provide a detailed, no-obligation quote.
3. Professional Installation
As KOHLER-certified technicians, we'll install your generator with expert care and precision.
4. Ongoing Support
We'll provide continued support through service contracts and maintenance plans to keep your generator running at its best.
Standby Generators for Every Home
20 kW
Powers most major appliances:
- • Entire kitchen
- • Most electronic devices
- • Heating and A/C Unit
26kW
Powers your entire home, including:
- • Heating and A/C Unit
- • Sump pump
- • Major appliances

About our dealership
Yestramski Electrical Services was started in 1989 by Tom Yestramski. The business began as an electrical contracting business, and developed a strong clientele across the Northeast. Our commitment to providing quality services and holding our customer's needs first has built the foundation on which YES has grown. In 1998, we became a certified Kohler Platinum Dealer and began providing Emergency Power Systems to our residential and commercial customers. Our team of generator technicians work on every make and model of generators and are certified with Kohler. Generator service and repair are their primary focus. Because of this, they are experts in their field and, as such, guarantee complete customer satisfaction. We have been providing superior electrical work since the origin of the business in 1989. Our team of licensed electricians are committed to ensuring that the work they provide is compliant with the National Electrical code. This ensures the safety and peace of mind for all of our customers. From a simple switch install to a large home remodel, every job is given the same expert attention to detail and quality customer service.
Read moreTrusted by homeowners like you
I don't have to be anxious
If a big storm is coming through - I don't have to be anxious about it.
Carol D.
I am just so grateful
We were without power for five days, but we just lived our life. I am just so grateful.
Susie B.
Kohler was, by far, the best
I looked at a couple different brands, and decided Kohler was, by far, the best.
Alex L.
Get a Quote
We'll talk about your specific needs and provide a quote on a backup power product and installation that is right for you.
358 SPRING ST
Contoocook, NH 03229