A backup system that is never tested is a guess.

Readiness

Everything in a residential microgrid ages while it waits.

The defining fact about backup equipment is that it waits. A standby generator may sit on its pad for eleven months between real outages. A battery cycles gently through ordinary evenings but is rarely asked for its full capacity. A transfer switch opens and closes a few times a year. All of that equipment ages while it waits: engine oil breaks down, the generator's own starting battery weakens, contacts in the transfer switch oxidize, firmware on the inverters and the gateway falls behind, and the smart panel's priorities drift from the way the family actually lives. The weekly self-exercise a generator runs proves the engine turns over; it does not prove the house will island.

County Line already services the Generac generators it installs twice a year, oil, filters, the starting battery, a load test and an inspection of the transfer switch, and on a residential microgrid that visit covers the rest of the system. The battery's state of health and its cycle history are read from the inverter. Firmware on the battery inverter, the solar inverter, the EV gateway and the smart panel is checked, because a manufacturer update that changes how a device behaves when the grid drops is exactly the kind of thing that should be discovered on a service visit, not during a wind event. Labels, clearances and the propane level are checked on the same walk.

Once a year the system is tested the only way that counts: with the main disconnect opened while the owner watches. The battery takes the load, the generator starts, the solar comes back under the battery inverter, the smart panel sheds what it should and restores what it should, the EV gateway does what the design says, and the house runs for long enough to see that it is really running and not merely lit. Then the main is closed and the system is watched as it returns to the grid. Most of the problems County Line finds in combined systems are found in that test, which is the reason it is part of the service and not an extra.

The family changes too, and the design should follow. A new EV, a pool, a converted garage with its own mini-split, a parent moving in with medical equipment: each one changes the critical-loads list and sometimes the sizing. The service visit is where that conversation happens, and where the smart panel's priorities are updated to match. A residential microgrid designed around a family in 2026 and never revisited is a system that quietly becomes wrong.

What this costs is the same twice-yearly service County Line charges for a generator, with the battery and the rest of the system checked on the same visit. What it buys is the difference between a system that was installed and a system that is ready, which on the afternoon the lines go down is the only difference that matters.

Back to the overview: Residential Microgrid.