Home / Generators / Home Battery Backup Wiring
Home Battery Backup Wiring
Fuel type changes where the unit can sit and what it costs to run. Missouri storm season decides this one. A generator earns its cost in the week the neighborhood is dark.
Home Battery Backup Wiring in O’Fallon and across St. Charles, St. Louis, Lincoln and Warren counties.
Owner-operated by Clint Ehman. Seventeen years in the trade, four of them running his own shop.
5.0 from 94 Google reviews · BBB A+ since 2022
What this work actually involves
Surge protection is installed at the panel where it can clamp what comes in, not just at the device.
The order is always the same: reproduce it, measure it, say what the number means, fix the thing the number points at. Nothing gets bundled on the way past.
Permits and inspections happen where the municipality requires them, and the panel is left labeled. One person does all of it.
When people call about this
- A well pump the house depends on
- A sump pump and a finished basement
- Portable generator cords through a window
- A home office that cannot go dark
Why people choose Clint for it
What the reviews keep mentioning is being told what the problem actually was. That is what an owner-operated shop can do and a dispatch model structurally cannot.
Seventeen years in the trade, 5.0 from 94 Google reviews, and BBB accredited A+ since December 2022.
Where this is done
O’Fallon is home and the shortest drive. Beyond it, St. Charles County, St. Louis County, St. Louis City, Lincoln County and Warren County.
See the full service area, or the rest of our backup power work.
Surge protection that actually works
Whole-home surge protection installs at the panel, where it can clamp what arrives on the service conductors. A power strip protects one device from what is already inside the house.
Both have a place. Layered protection, panel plus point-of-use for sensitive electronics, is what survives a Missouri storm season intact.
The transfer arrangement is the safety-critical part
Whatever the source, the transfer has to make feeding the utility physically impossible. That is a transfer switch or a listed interlock, and it is what protects the crews working to restore your street.
A cord into a dryer outlet does not do that, and it is the single most dangerous thing homeowners improvise during an outage.
Battery systems and the transfer arrangement
A home battery stores a fixed number of kilowatt hours, so what matters is the list of loads it feeds and for how long, not the headline capacity. Written down honestly, that list is usually the furnace blower, the refrigerator, the well or sump pump and some lighting.
The transfer has to make back-feeding the utility physically impossible, and the critical loads get moved to their own panel so the battery is not trying to carry the whole house.
The honest arithmetic of standby power
Standby power is priced by capacity, and capacity is set by the list of what runs. Every item added to the list raises the number, which is why the list is written first and shown to you.
A system sized to a realistic list gets used and maintained. One sized to a worst case sits unused and still costs what it cost.
What makes this harder in older housing stock
Across this metro the recurring complications are predictable: no equipment ground, aluminum branch wiring from the mid-seventies, knob-and-tube buried in blown-in insulation, panels that have been added to several times, and splices in places the code has not allowed for decades.
Those turn a simple job into a decision about scope. The decision gets put to you with the reading behind it rather than made quietly and billed.
“Clint did an excellent job installing two bathroom exhaust fans. He installed high-quality fans that were far superior to the ones I had purchased from a big box store. I highly recommend his services.”
David Hinners · Google review
How the visit goes
- The call
What you need to keep running and how often the power goes out where you are.
- The measurement
The loads you named, added up honestly, and the panel’s capacity to feed a transfer switch or interlock.
- The finding
A size and a configuration, with the cost difference between keeping the essentials on and running the whole house made plain.
- The work
Unit sited, circuit run, transfer switch or interlock installed so back-feeding is impossible, inspected, then a walkthrough of starting and transferring with you present.
What the job includes
- Load selection: what has to run, what can wait
- Generator or inlet sized to the chosen loads
- Transfer switch or interlock so back-feeding is impossible
- Pad or mounting, and the circuit to it
- Permit and inspection where required
- A walkthrough of starting and transferring, in person
What it does not
- Gas piping, which is the plumber’s trade
- Concrete pads beyond a prefabricated base
- Generator servicing contracts
Anything outside electrical, you will be told who to call rather than sold it. See finished work, or say what the house is doing.
Related backup power work
Home Battery Backup Wiring across the metro
The same job is not the same job in every part of this metro. Out of O’Fallon across thirty municipalities, where the permit process changes more than the work does.
Warren County
Backup power is a more common purchase out here, and when a well pump is the water supply the loads that matter are not the kitchen.
St. Charles County
Modern wiring, undersized services. That combination defines most of the work in this county, and it makes the load calculation the deciding document rather than a panel inspection.
St. Louis County
Houses with real history in the walls, and a permit process that changes from one municipality to the next.
See which towns fall inside the radius on the service areas page.
Questions worth asking first.
Is a transfer switch required?
Yes, for any permanent standby system. It stops the generator back-feeding the utility, which is what protects the line workers restoring your street.
Can I use a generator cord into a dryer outlet?
No. That back-feeds the utility and endangers the crews working your line. A transfer switch or a listed interlock is what makes that physically impossible.
Battery or generator?
A battery is silent and instant for a limited number of hours; a generator runs as long as it has fuel. How long your power usually stays out decides it.
Where do you work?
Out of O’Fallon across St. Charles County, St. Louis County, St. Louis City, and Lincoln and Warren counties, roughly a fifty mile radius.
Do you pull permits?
Where the municipality requires one, yes, and the work is left ready for inspection with the panel labeled and junctions accessible. Requirements genuinely differ across this metro, which is why it is established per address rather than assumed.
Find out which problem you have.
Several causes, very different prices, and only a measurement separates them. Home Battery Backup Wiring in O’Fallon and across the metro.
Mon-Thu 8-5 · Fri 8-4 · Sat 10-3 · or ask online