You've chosen your backup power - a portable generator hookup or a battery power station - and scheduled the field work. The process is primarily electrical because this scope has no permanent fuel line. Field duration, the required outage window, and elapsed project timing are documented after the equipment, circuits, site conditions, access, permit path, and inspection requirements are reviewed.
Key Takeaways
- Field duration is documented after the equipment, circuits, route, site conditions, and access are reviewed.
- The planned power-off window is documented with the approved field scope rather than promised as a fixed number of hours.
- A portable generator hookup includes an inlet plus listed transfer or interlock equipment; a battery project adds the compatible listed equipment and approved integration method.
- AHJ permit, inspection, utility, and any HOA schedules control elapsed project timing.
Before Installation Day
Preparation
Before we arrive, you may need to:
Planning Backup Power for Your Home?
Plan for the next outage with a listed portable-generator hookup or a compatible battery-backup installation. We evaluate the panel, selected loads, equipment, and transfer method before quoting the electrical scope. Call (571) 444-6886 to request an in-home assessment.
- Clear access to your electrical panel and the work area
- Clear the proposed battery area; final placement and clearance follow the exact listing, manufacturer instructions, and approved design
- Relocate items near the panel and the planned inlet-box location
- Secure pets away from the work zone
What We Handle
- Pulling the electrical permit
- Confirming your panel works with an interlock kit or transfer switch
- Sizing the battery capacity and circuits, or sizing the hookup for your generator
- Scheduling the county inspection
Critical Setup for Medical Needs: Verify power-source, waveform, transfer, and restart compatibility with the device manufacturer before connecting medical equipment. Maintain device-specific backup and a separate emergency plan; no battery, transfer system, or load-management setting promises uninterrupted power.
Field Work Overview
The written scope documents field duration after the equipment, circuit count, conductor route, site conditions, and access are verified:
- Portable generator hookup: mount the inlet box, install compatible listed transfer or interlock equipment, wire, and test
- Battery power station: place compatible listed equipment, hardwire the approved integration, program, and test
- Additional scope: circuit count, route, panel condition, access, service work, and corrections can change field duration
Portable Generator Hookup: Step by Step
Inlet Box Mounting
- Mount the weatherproof generator inlet box on an exterior wall in a convenient, dry spot
- Run conduit from the inlet box to the panel
Transfer Switch or Interlock
- Planned power shutoff while we connect at the panel; the written field scope documents the outage window
- Install the manual transfer switch, or an interlock kit if your panel supports one
- Wire the selected circuits
Test the Connection
- Connect your portable generator outdoors and confirm it powers the intended circuits
- Verify the interlock/transfer switch prevents backfeed
Battery Power Station: Step by Step
Placement
- Set the battery only in a location permitted by its listing and manufacturer instructions, with required clearance, ventilation, and temperature conditions
- Position any expansion batteries
Hardwiring and Smart Home Panel
- Planned power shutoff while we tie into the main panel; the written field scope documents the outage window
- Hardwire compatible listed battery and transfer or load-management equipment documented in the approved scope
- Set up grid (and optional solar) recharging
Programming and Testing
- Program circuit priorities and load management
- When supported by the exact equipment, simulate the approved outage sequence to verify transfer timing, selected loads, restart behavior, and reporting
- Verify the battery powers the intended circuits and reports correctly in the app
What You'll Experience
Noise
Expect normal installation noise from power tools and drilling - no trenching or heavy equipment is involved.
Power Outage
Panel connection requires a planned power-off window. Its duration is documented after the equipment, circuits, panel condition, route, site access, and any utility coordination are reviewed:
- Don't schedule work calls requiring computers during that window
- Keep refrigerator and freezer doors closed
- Medical equipment users should follow the device manufacturer's compatibility guidance and maintain device-specific backup and an emergency plan
Homeowner Training
Before we leave, we'll show you:
- How to connect and start a portable generator safely (outdoors only)
- How to operate the transfer switch or interlock
- How to read battery state of charge and runtime in the app
- How the smart home panel prioritizes circuits
- Carbon-monoxide safety for the generator
- Emergency contact information
After Installation
Inspection
We request the required electrical inspection under the documented scope. The AHJ controls inspection availability, corrections, and approval timing, and the inspector needs access to the panel and equipment.
Monitoring Setup
For a battery, we'll help you set up the manufacturer's app so you can monitor charge, runtime, and circuits from anywhere.
Professional Installation Matters
A proper installation ensures:
- Code compliance (NEC 702) and a successful inspection
- Valid equipment and installation warranties
- Safe operation - no backfeed risk
- Reliable performance when you need it
- Insurance acceptance
At AJ Long Electric, we install transfer switches, listed interlock kits, and inlet boxes for customer-provided portable generators across Northern Virginia. For battery projects, we can include compatible listed equipment in an approved scope or connect customer-selected listed equipment, with exact equipment and responsibility boundaries documented in the written proposal. Brand examples do not imply certification or a product relationship. Contact us to request a site assessment.
