Questions and answers
Plain answers to the questions we hear most.
Search, or jump to a topic. If your question is not here, call the office and a person will answer it.
Buying and pricing
How much does a home standby generator cost installed?
In our area most installs land between $9,800 and $21,500 for air-cooled units (10 to 26 kW) and $27,000 to $42,000 for liquid-cooled units (30 to 48 kW). That includes the transfer switch, pad, permits, the first 30 feet of gas and wire, and your first-year service visit. The pricing page shows each size.
Why is your quote higher or lower than an online price?
Online prices are often the generator alone. A working system also needs a transfer switch, a pad, a gas line, wiring, permits and an inspection. We print each of those as a line so you can compare like with like.
Which brands do you sell?
We install two lines: Hemlock air-cooled units and Ledgestone liquid-cooled units (fictional names on this demo site). We repair and service most other home standby brands.
Do you offer financing?
Yes, through a credit union we work with. Checking your rate is a soft pull, terms run 5 to 10 years, and there is no penalty for paying early. The financing page shows example payments.
Sizing and fuel
How do you decide what size I need?
We add up what you want running at once, add the biggest starting surge (usually the central air or the well pump), and leave some headroom. The online calculator does a simple version; the site visit confirms it at your panel.
Can a smaller generator run my whole house?
Often, yes, with load management. A module pauses one heavy load like the central air or the dryer when the generator is busy, and lets it run again when there is room. It can save you a size step.
Natural gas or propane?
If gas is on your street, it is usually simplest: nothing to refill. Most rural roads around Concord run on propane. Air-cooled units make about 10% less power on natural gas, so we size for that.
How long will it run on propane?
As a rough guide, a 22 kW unit at half load uses about 2 gallons an hour. A 500-gallon tank, which is filled to about 80%, lasts roughly a week of steady running. Your supplier can tell you their delivery terms during storms.
Installation and permits
Do I need a permit?
Yes. Every town we work in requires electrical and gas permits for a standby install. We file them, book the inspection and attend it. The permit cost is on your quote.
Where will the generator go?
Outside, on a pad, at the code distances from windows, doors, vents and the gas meter. We pick the spot with you on the site visit and mark it before we quote.
What about my HOA?
We prepare a site sketch, the unit's sound rating and a photo of a similar install for your HOA letter. Some HOAs ask for a screen or plantings; we can price that too.
How loud is it?
During the weekly exercise most air-cooled units are about as loud as a central air unit at the same distance. Under full load it is louder. We set the exercise time to suit you, often a weekday mid-morning.
Running it safely
Is a standby generator safe to run near the house?
Yes, when it is placed at the code distances outside the house. The engine makes carbon monoxide, which is why it lives outside and why we set it away from openings. We still recommend carbon monoxide alarms on every level of every home.
Can I run my portable generator in the garage with the door open?
No. Never run a portable generator indoors, in a garage, basement, shed or porch, even with doors or windows open. Keep it at least 20 feet from the house with the exhaust pointed away. Carbon monoxide has no smell.
What if I smell gas near the generator?
Do not touch the unit or any switches. Leave the area, then call your gas utility or 911 from a safe distance. Call us after they have made it safe.
Service and plans
How often does a generator need service?
Once a year for most air-cooled home units, or after a long run during an outage. Homes with long outages, wells or medical needs often choose twice a year.
Do your plans auto-renew?
No. We remind you 30 days before the end and only renew if you say yes. You can cancel any time and we refund unused visits.
Will you service a generator someone else installed?
Yes. Most of our repair calls are on other installers' units. We service most air-cooled and liquid-cooled home standby brands.
Still have a question?
Call (603) 555-0142 and a person answers during office hours. Each line below goes to the person who handles it.
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Quotes and site visits
Mon to Fri, 7:30 a.m. to 5 p.m.
Ruth books site visits and answers sizing questions.
(603) 555-0142 -
Service and repairs
Mon to Fri 7 a.m. to 6 p.m., Sat 8 to noon
Any brand. A light on the unit, a failed exercise, a strange noise.
(603) 555-0143 -
Plan member outage line
Every day during a declared outage
Plan members go to the front of the repair queue.
(603) 555-0143 -
Permits and paperwork
Mon to Fri, 9 a.m. to 3 p.m.
Town permits, HOA letters, gas utility and propane supplier forms.
hello@keeplight.example -
Maintenance plans
Mon to Fri, 8 a.m. to 4 p.m.
Jen schedules plan visits and answers billing questions.
service@keeplight.example -
Shop counter
Mon to Fri, 8 a.m. to 4 p.m.
Pick up a cord or an inlet part, or drop off paperwork.
41 Millbrook Way, Concord
Site visits are free
Ready when the next outage is.
Tell us about the house in five short steps and we will book a site visit. Or start with the sizing calculator and bring the estimate with you.