Electrical
Standby Generator Installation and Maintenance in Greater Roanoke
Wisler Plumbing, Heating, Cooling & Electric
Keep power on with expert standby generator installation and maintenance you can trust. Our licensed electricians size, install, and service whole-home systems the right way. We serve the Greater Roanoke Area, including Roanoke, Salem, and Martinsville. Count on transparent pricing, NATE-certified techs, and a 4.9 rating from 3,938 reviews. Ready for reliable backup power? Contact us to schedule your free on-site assessment.
Why Choose Us
NATE-certified experts
Weekly technical training and certified technicians
Since 1986
Family-run with over 35 years of local service
Transparent pricing
Upfront estimates with no hidden fees
Top-rated service
4.9 rating from 3,938 reviews
Strong guarantees
100% satisfaction guarantee and customer-first policies
What you can expect to pay
Standby Generator Installation and Maintenance jobs cost $99 to $24,500, depending on the work. Each job type is broken down below.
Maintain
Coupons & specials
Offers & savings
- $500 OFFView offer
Standby Generator Installation and Maintenance
$500 OFF Installation of a Kohler whole-home generator
Restrictions may apply. Call for more information. Exp 10/31
Call for more information.
Expires
Reviews
What Our Customers Say
Customers mention
- professionalism1
- quality1
- expertise1
Based on the reviews shown here.
Darrell and John did a great job installing my new generator. On time, professional, and courteous.
MariaEstimator Roger answered my questions and offered helpful suggestions. Looking forward to feeling power secure.
Steven S.Roger was very knowledgeable and explained options between models. Would definitely recommend.
Ron N.
What is the 80% rule for a generator?
The 80% rule for a generator means you plan continuous running loads to use no more than about 80% of the generator’s rated capacity. This headroom helps handle motor start-ups, heat, and voltage stability so the unit doesn’t strain during longer runtimes.
For standby planning, size the generator so everyday loads sit near 80% and the remaining 20% is open for appliance start surges and short peaks. A practical sizing pass looks at combined start-up demand from items like a well pump, HVAC blower, and refrigerator rather than each device in isolation. Our electricians regularly apply this approach when sizing whole-home systems across the Roanoke Valley.
Use these quick checks to decide if you need a larger unit or load-shedding:
- Breakers trip or lights dim when big appliances start.
- Frequency drops or the engine hunts under steady load.
- “Essential-only” circuits already push 70–80% of capacity.
- Loads run for hours in hot weather without recovery time.
Make a list of running and starting watts for major appliances and verify sizing with a licensed electrician before purchase or reconfiguration.
Updated: 2026-10-23
Need help in Cave Spring, VA? Call (540) 238-0320 or book online.
What are the top reasons a Generac generator won't start?
Most no-start calls we see trace to overdue maintenance or transfer-switch/panel integration issues. Routine service—oil changes, filter replacements, and inspections—often restores reliable starts. We install and service whole-home systems, so our electricians can verify ATS operation and the generator’s integration with your electrical panel in Roanoke and Rocky Mount.
Quick checks:
- Note when the last oil and filter service was performed.
- Do not attempt panel or ATS work yourself; schedule a professional inspection.
- Ask about financing if repairs or replacement are needed.
Updated: 2025-12-12 00:00:00
Need help in Moneta, VA? Call (540) 234-2001 or book online.
"Roger was professional, very knowledgeable and a pleasure to conduct an estimate for generator installation!" — Ron N.
How often should I change the oil in my standby generator?
Change the oil per your generator manufacturer’s schedule, which is based on run hours and time in service. We include oil changes, filter replacements, and inspections in routine generator maintenance. If your generator ran for many hours during a storm or outage, schedule service soon. Our licensed team services whole-home generators in Roanoke and Martinsville and can advise the right interval for your model. Diamond Club members receive priority service and one annual electrical inspection.
Updated: 2025-11-27
Need help in Bassett, VA? Call (540) 234-2001 or book online.
"Roger was professional, very knowledgeable and a pleasure to conduct an estimate for generator installation!" — Ron N.
How much does whole house generator installation typically cost?
Whole-house generator installation cost varies by home and electrical setup. A Wisler electrician will confirm exact pricing after an on-site assessment and provide a fixed quote. Costs depend on whole-home capacity and required electrical tie-ins, such as the automatic transfer switch (ATS) and any panel coordination. We offer a free quote in the Roanoke area and financing options (GoodLeap). Current promo: $500 off installation of a Kohler whole home generator plus a free 200-amp ATS with qualifying purchase.
Updated: 2026-01-02 00:00:00
Need help in Rocky Mount, VA? Call (540) 234-2001 or book online.
How much does whole house generator installation cost?
Whole-house generator installation cost is confirmed after an on-site assessment because it varies by generator size, fuel source, and the electrical work required. The biggest driver is capacity (kW) to cover your home’s loads, which sets both equipment and installation scope.
We install and service systems across the Roanoke area, including many Cave Spring homes. A technician will size the unit, review gas or propane routing, and evaluate your panel and transfer-switch approach; in our experience, choosing whole-home vs essential-circuit switching can change labor more than homeowners expect. If your existing unit needs frequent repairs, replacement often lowers lifetime cost. Current offers include $500 off complete generator installs or $500 off Kohler whole-home generators, and a free 200-amp ATS with a new stand-alone whole-home generator, with financing options available.
Typical cost drivers we check:
- kW size and brand of the generator
- Natural gas vs propane fuel setup and line routing
- Transfer switch type and electrical panel upgrades
- Site prep, pad, and distance to utilities
Schedule a load calculation and site walk so we can provide a firm, written quote.
Updated: 2026-10-09
Need help in Cave Spring, VA? Call (540) 238-0320 or book online. "The generator installation went off without a hitch." — Mike F.
How much does standby generator repair typically cost?
Standby generator repair cost varies by issue and is confirmed after an on-site diagnostic. Most costs come down to the parts that need replacement and the labor time to restore safe, reliable operation rather than simple maintenance. Our electricians work on many home generators in the Roanoke area and provide clear quotes before any repair begins.
Price can swing based on:
- Diagnostic time needed to trace the fault
- Components replaced (electrical controls, fuel-system parts, sensors, wiring)
- Generator size and system complexity
- Age, maintenance history, and whether the visit is urgent or scheduled
Free quotes are available for generator repair and installation. Schedule service promptly if your unit won’t start or trips off under load to avoid damage during an outage.
Updated: 2026-04-02
Need help in Rocky Mount, VA? Call (540) 238-0320 or book online.
How much does standby generator repair service typically cost?
There isn’t a one-size price for standby generator repair. Wisler provides free quotes in the Roanoke area, and final cost depends on the diagnosis, parts, and labor. Repairs can range from simple maintenance items to fixes involving the automatic transfer switch or panel tie-ins. A technician will assess your whole-home system and confirm pricing on site. Licensed electricians perform the work and back it with our 100% satisfaction guarantee.
Quick factors that affect cost:
- Issue severity and parts needed (oil, filters, battery, ATS components)
- Generator size and accessibility
Updated: 2026-01-02
Need help in Rocky Mount, VA? Call (540) 234-2001 or book online.
How much does it cost to install a standby generator at home?
Home standby generator installation cost is custom to each home and finalized after an on-site assessment. The largest cost driver is the generator size required to support your essential circuits during an outage. We install and service generators throughout the Roanoke region with licensed, background-checked technicians. $500 off complete generator installation is currently offered; call to confirm eligibility and any restrictions.
Key factors that set the final price:
- Power capacity (kW) and whole-home vs. essential-circuit coverage
- Fuel source (natural gas or propane) and meter/tank readiness
- Transfer switch type and any electrical panel upgrades
- Site work, pad placement, trenching, and distance to utilities
Schedule an in-home load calculation and site visit to get an exact, upfront quote with no surprises.
Updated: 2026-03-13
Need help in Daleville, VA? Call (540) 238-0320 or book online. "Roger was professional, very knowledgeable and a pleasure to conduct an estimate for generator installation!" — Ron N.
How much does home standby generator repair typically cost?
Home standby generator repair cost depends on the problem, needed parts, and system size. We inspect your unit and provide a firm, upfront quote before work begins. In Roanoke and surrounding areas, you can request a free quote for generator service. Common fixes include batteries, oil and filters, sensors, or automatic transfer switch issues. Financing is available through GoodLeap for larger repairs. Exact pricing is confirmed on site by a licensed electrician.
Updated: 2026-01-02 00:00:00
Need help in Rocky Mount, VA? Call (540) 234-2001 or book online.
Can I service my standby generator myself safely and effectively?
You can handle basic upkeep, but safe, effective standby generator service is best left to a licensed technician. Regular oil changes, filter replacements, and inspections keep performance strong. With proper maintenance, many home generators last 8–10 years, and some reach 15–20 years. Because whole‑home systems tie into your electrical panel and an automatic transfer switch, a pro should perform repairs and adjustments. We install, service, and repair generators with 24/7 support in Roanoke and nearby areas.
Updated: 2025-12-21
Need help in Roanoke, VA? Call (540) 234-2001 or book online.
"Roger was professional, very knowledgeable and a pleasure to conduct an estimate for generator installation!" — Ron N.
Can I install a backup generator myself safely?
No—backup generator installation is not a safe DIY project; it should be done by a qualified electrician with proper fuel and exhaust handling. The biggest risks are electrical backfeed that can injure people or damage the grid, fire from incorrect wiring, and carbon monoxide if exhaust is misrouted. A pro also sizes the system correctly and sets up a transfer switch so your home and the utility stay isolated. We install and service generators throughout the Roanoke area, including Rocky Mount, and we often see DIY jobs skip neutral–ground bonding, which can trip GFCIs and harm electronics. With professional setup, routine oil and filter changes plus inspections help your generator last for many years.
Call a professional if any of these apply:
- You need an automatic transfer switch (ATS) or whole‑home integration.
- The unit connects to natural gas or propane and requires venting.
- Load calculations, grounding, and bonding are unfamiliar.
- You want warranty‑compliant startup testing and documentation.
If you’re without power now, run only outdoor‑rated generators far from doors and windows and never backfeed a home through a breaker or outlet.
Updated: 2026-10-01
Need help in Rocky Mount, VA? Call (540) 238-0320 or book online. “The generator installation went off without a hitch. Fantastic job.” — Roger C.
Learn more
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We serve the Greater Roanoke Area, with frequent visits to Roanoke, Salem, and Martinsville. See the full list of communities below.
Service area
Service Areas We Cover
- Fincastle, VA
- Cave Spring, VA
- Check, VA
- Penhook, VA
- Callaway, VA
- Salem, VA
- Rocky Mount, VA
- Bassett, VA
- Stanleytown, VA
- Union Hall, VA
- Fieldale, VA
- Shawsville, VA
- Huddleston, VA
- Glade Hill, VA
- Callands, VA
- Cloverdale, VA
- Sandy Level, VA
- Martinsville, VA
- Vinton, VA
- Thaxton, VA
- Copper Hill, VA
- Pilot, VA
- Goodview, VA
- Moneta, VA
- Boones Mill, VA
- Blue Ridge, VA
- Pittsville, VA
- Henry, VA
- Wirtz, VA
- Daleville, VA
- Bent Mountain, VA
- Collinsville, VA
- Ferrum, VA
- Elliston, VA
- Hardy, VA
- Roanoke, VA






























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