Hangzhou Zenius New Energy Co., Ltd.
-
+86 158-8822-2598
AWG Electricity Use: kWh per Litre and Real Running Cost
Short answer: a modern cooling-condensation AWG uses roughly 0.3 to 0.5 kWh per litre. A 20 L/day household unit such as the Aquaura A20 therefore draws about 6 to 10 kWh per day — comparable to running a refrigerator. At a US average tariff of about $0.15 per kWh that is roughly $1 to $1.50 per day, or about 5 to 8 cents per litre.
The same machines are sold and searched for under several labels — air water generator, air-to-water machine, water-from-air machine and atmospheric water maker all describe this equipment. Whichever term brought you here, everything below applies identically.
Per-litre energy use at different scales
| Model class | Example | Daily output | Energy use | Implied kWh/L |
|---|---|---|---|---|
| Household | Aquaura A20 | 20 L/day | 6–10 kWh/day | 0.3–0.5 |
| Light commercial | Aquaura A250 | 250 L/day | 75–125 kWh/day | 0.3–0.5 |
| Industrial | ZEN-L 6000 | 6,000 L/day | on application | lower with heat recovery |
Figures follow the efficiency band published on our AWG technology page. Larger machines recover more of their cooling energy, so cost per litre generally falls as capacity rises.
What shifts your kWh per litre — and by how much
- Relative humidity. This is the dominant variable. Output falls roughly as shown below while draw stays close to constant, so your cost per litre rises as the air dries.
- Ambient temperature. Warm air carries more moisture per cubic metre, so warm climates condense more water for the same compressor work.
- Filter condition. A loaded pre-filter restricts airflow and makes the compressor work harder for the same water.
- Duty cycle and setpoints. Running the unit during the day’s most humid window produces more water per kWh than running it on a fixed schedule.
| Relative humidity | Output vs. rated | Effect on cost per litre |
|---|---|---|
| 80%+ | 100% of rating | Baseline |
| 60–80% | 75–90% | About 1.1–1.3x |
| 40–60% | 50–70% | About 1.4–2x |
| 20–40% | 20–40% | About 2.5–5x |
| Below 20% | Not practical | Use a desiccant-based system |
Annual electricity cost, worked examples
- Apartment or small household (A20, 20 L/day): about 8 kWh/day average → roughly 2,900 kWh/year → around $440/year at $0.15/kWh.
- Villa or small office (A70, 70 L/day): roughly 21–35 kWh/day → around $1,150–1,900/year at the same tariff.
- Commercial (A250, 250 L/day): 75–125 kWh/day → around $4,100–6,800/year.
Set those against bottled water: a household drinking 12 litres a day at $1.50 per gallon-equivalent spends well over $1,000 a year on purchased water before anyone lifts a single crate.
How to cut the running cost
- Pair it with solar. As a rule of thumb allow roughly 400–800 W of PV per 30 L/day of output — see the calculations behind our solar-powered AWG guide.
- Size honestly. An oversized unit cycling briefly is less efficient per litre than a correctly sized unit running steadily. Start from our AWG sizing guide.
- Maintain the intake path. Clean pre-filters is the cheapest efficiency upgrade there is; see AWG filter replacement intervals.
- Run on the humidity peak. In most climates that is overnight and early morning.
Bottom line: an AWG is not free water — it is an electrical appliance that turns humid air into drinking water at roughly 5 to 8 cents per litre. Judged as infrastructure rather than as a magic box, the arithmetic is straightforward and, against bottled water, strongly favourable.
Models, pricing and lead times: all 37 AWG models · request a quote · AWG FAQs