Guide
Updated · 22 Sep 2026 · Sheet checked · 22 Sep 2026
It depends
For homeowners who want well pressure in an outage and are staring at a power-station carton instead of a generator.
Most U.S. residential submersible wells are 230/240 V motors. A 120 V-only station — even with a loud surge badge — is the wrong voltage. Size continuous watts first, surge second, then ask how many watt-hours cover pump cycles. Desk review of manufacturer motor sheets and live Outage Stack station pages — not a clamp meter on your well.
A “will it run X?” guide for portable battery stations against a typical rural well. Not a product SKU. Cross-check /guides/what-size: Well 1/2–3/4 HP planning band 800–1,500 W run / 2,000–4,000 W start — and that page already says measure yours.
Primary numbers come from Goulds Water Technology / Faradyne 4″ single-phase sheets (Xylem BC3WIRE-G2) and Faradyne’s published 4″ tables: full-load watts, service-factor watts, and locked-rotor amps (LRA) — not “HP × 746.”
Read the nameplate / control box first. Voltage, HP, and LRA beat any website chart.
Goulds/Faradyne Gen II 3-wire, 230 V, CSCR examples (FL W / SF W / LRA → ≈ start VA = LRA × 230):
| Motor (sheet) | Run (FL W) | SF W | LRA | ≈ Start VA |
|---|---|---|---|---|
| 1/2 HP M05412 | 715 | 950 | 21 | ≈4,830 |
| 3/4 HP M07412 | 920 | 1,235 | 32 | ≈7,360 |
| 1 HP M10412 | 1,165 | 1,490 | 41 | ≈9,430 |
Faradyne 2-wire PSC 230 V: 1/2 HP ≈870 W FL / 14 LRA (≈3,220 VA start); 3/4 HP ≈1,040 W FL / 17 LRA (≈3,910 VA). Franklin-class 2-wire 1/2 HP sheets often show ~32 LRA at 230 V (≈7,400 VA). Same HP, very different start — horsepower-only advice fails.
Against live Outage Stack stations (scheme A /stations/{slug}):
Runtime is Wh, not the surge sticker. Planning band (not a manufacturer guarantee): usable Wh ≈ rated × 0.85. Worked 500 W line: DELTA 2 → ≈870 usable → ≈1.7 h; AC200L → ≈1,741 usable → ≈3.4 h; F3800 → ≈3,264 usable → ≈6.5 h. A well drawing ~1,000 W burns that roughly twice as fast — worse if the pressure tank short-cycles.
Hardware stack that works: nameplate match → same-voltage station (or inverter generator) with enough continuous + start → listed transfer / interlock (compare) → healthy pressure tank so the motor is not hammering LRA every minute.
Skip treating a 1–2 kWh, 120 V carry station as a well plant. Skip HP-only charts when the control box shows LRA. Skip soft-start folklore that ignores voltage. Skip anyone who needs automatic whole-home standby with a listed ATS — that is Generac Guardian 22 kW class, not a suitcase battery.
It depends. A portable station runs a well pump only when voltage matches, continuous watts cover service-factor run, surge covers measured or sheet LRA start, and Wh cover the duty cycle you live through. Most live 120 V Outage Stack stations fail the first gate. Dual-V multi-kW bricks (F3800 / DELTA Pro 3 class) can clear it after you measure. Until the clamp meter and the nameplate agree, the honest chip is measure first — not Buy.