Capacity guide · Night 6

500 Wh vs 1,000 Wh vs 2,000 Wh — what actually lasts

Watt-hours buy time, not horsepower. AC watts start the fridge; Wh decides whether Wi‑Fi, a laptop, or food lasts past midnight. This page maps the three classes people actually shop — with real current models and labelled runtime estimates.

How to read Wh (without marketing math)

  • Nameplate Wh ≠ usable Wh. Plan on roughly ~85% after inverter loss and battery reserve (rule of thumb, not a lab measurement).
  • Estimate formula: usable Wh ÷ average watts ≈ hours. Example: 1,000 Wh × 0.85 ÷ 60 W ≈ ~14 h.
  • Watts vs Wh. A 500 Wh box with 500 W AC may not start a fridge; a 2,000 Wh box with 2,400 W AC usually will. Match both.
  • Duty cycle wins. A closed fridge averaging 50–80 W lasts far longer than the same fridge with the door open every ten minutes.

Specs below are from manufacturer product pages (checked Oct 2026). Runtime columns are estimates — confirm loads on your own nameplates before buying.

The three classes, side by side

One representative job per class. Example models are current SKUs already used across QuietWatt — not a sponsored ranking.

Class Typical Wh Best for Weak at Example models Approx. USD
~500 Wh Light ≈450–600 Wh Phones, modem/router, LED lights, laptop for a work block, short outages Fridge overnight, multi-appliance blackouts, high surge starts EcoFlow RIVER 2 Max (512 Wh · 500 W · ~13 lb · LFP)
Jackery Explorer 500 (518 Wh · 500 W · ~13–14 lb) 		~$250–400
~1,000 Wh Default ≈1,000–1,100 Wh Apartment overnight: fridge + Wi‑Fi + lights; CPAP sleep (specs-only); stairs-friendly carry Multi-day outages without solar / extra battery; large older compressors on the tightest surge units Jackery Explorer 1000 v2 (1,070 Wh · 1,500 W · 23.8 lb)
EcoFlow DELTA 3 Plus (1,024 Wh · 1,800 W · expandable)
BLUETTI Elite 100 V2 (1,024 Wh · 1,800 W)
Anker SOLIX C1000 (1,056 Wh · 1,800 W · expandable) 		~$380–900
~2,000 Wh Multi-day ≈2,000–2,100 Wh Fridge through a long outage, campervan weekends, WFH + food + lights, higher continuous AC Walk-up stairs (often 40–60+ lb); price and footprint Jackery Explorer 2000 v2 (2,042 Wh · 2,200 W · ~39.5 lb)
EcoFlow DELTA 2 Max (2,048 Wh · 2,400 W · ~50 lb)
BLUETTI AC200L (2,048 Wh · 2,400 W · ~62 lb) 		~$900–1,900

QuietWatt is independent. We do not sell these products. Specs and prices change — always verify on the official product URL before buying.

Runtime estimates by class

Same loads, three battery sizes. Usable energy assumed at ~85% of nameplate. Figures are estimates for planning — not manufacturer guarantees.

Load (avg draw) ~500 Wh class
~425 usable Wh		 ~1,000 Wh class
~850 usable Wh		 ~2,000 Wh class
~1,700 usable Wh
Wi‑Fi router / modem (~10 W) ~40 h estimate ~85 h estimate ~170 h estimate
LED lights + phones + modem (~30 W) ~14 h estimate ~28 h estimate ~56 h estimate
Laptop work block (~60 W) ~7 h estimate ~14 h estimate ~28 h estimate
Fridge duty cycle (~60 W avg, door shut) ~7 h estimate — often too short for overnight food safety; also check surge ~14 h estimate — overnight class for many apartments ~28 h estimate — multi-day buffer in mild weather
CPAP-class draw (~50 W, no humidifier) specs only — not medical advice ~8.5 h estimate — marginal for a full night ~17 h estimate — comfortable overnight band ~34 h estimate — multi-night / humidifier headroom
Mixed blackout kit (~120 W: fridge + Wi‑Fi + lamp + laptop bursts) ~3.5 h estimate ~7 h estimate ~14 h estimate

Buy ~500 Wh when…

Grab-and-go

You need phones, modem, lights, and a laptop through a short outage — and you will carry it upstairs. Do not expect a fridge night.

Buy ~1,000 Wh when…

Default kit

Apartment overnight is the job: fridge + Wi‑Fi + lights. Best $/use for renters. Expand later (EcoFlow / Anker) if storms run long.

Buy ~2,000 Wh when…

Multi-day

Food safety past one night, van weekends, or WFH + fridge together. Accept weight (often 40–60+ lb) and higher street price.

Estimates use usable Wh ≈ nameplate × 0.85, then ÷ average watts. Real runtimes vary with inverter efficiency, temperature, battery age, and how often the fridge compressor starts.

Quick pick

Where to buy (affiliate placeholders)

Tracked affiliate links will replace these placeholders once QuietWatt is enrolled in each program. Until then, use the official product URLs in the table above.

Buy via EcoFlow Buy via BLUETTI Buy via Anker Buy via Jackery Buy via Amazon

Placeholder anchors: #aff-ecoflow, #aff-bluetti, #aff-anker, #aff-jackery, #aff-amazon — documented in README.

Sources