Head north on the 231 corridor and the fuel question answers itself: there’s no gas main to debate, so a Meridianville standby install is a propane install, full stop. That flips the buying order from the city’s version. Down there, the meter gates the unit; up here, nothing gates the flow — instead tank sizing done honestly sets how many days of outage you own, and that decision leads everything else.
Why does the tank come before the generator?
Because it’s the half of the system you can’t cheat later. The unit’s size determines burn rate; the tank’s size determines the budget that burn rate spends. Buy the generator first and you’ve committed to a consumption number before deciding how many days you want it to run — backwards. Decide the runtime target first (a night? the 2011-style week?), then size the pair together: usable gallons — about 80% of the rated number — against the unit’s half-load draw from its spec sheet (about 2.53 gallons per hour for a Generac 22kW).
This is also where right-sizing pays twice. A unit sized correctly by the nameplate sizing walkthrough burns meaningfully less than an oversized one covering the same house — on a fixed tank, that difference is measured in days.
What’s the corridor reality beyond the math?
Refill logistics. Propane arrives by truck, and after a valley-wide storm event the delivery lists run long — corridor addresses wait their turn like everyone else’s. The planning consequence: size the tank to clear the whole event without a mid-outage refill, and go into spring storm season with it comfortably full. The tank also has to sit where a delivery truck can actually reach it, which on long drives and back-of-property placements is a genuine siting constraint the site visit checks alongside code clearances.
Whose rules govern an install out here?
Madison County’s — most of the corridor is unincorporated, so permits file with the county rather than the City of Huntsville, with the same electrical-and-fuel inspection pair as everywhere in the valley. The mechanics don’t change: pad, placement, transfer switch, commissioning, all per installation, start to finish. What changes up here is only what leads the conversation — and on this corridor, the tank talks first.