how much electricity does an apple computer use?
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First off, every Mac has three basic states: active, sleeping, and shut down. Desktop Macs use the most power when active, of course, and although details vary by model, a 27-inch iMac idles at about 60 watts and maxes out at 240 watts, averaging about 100 watts in regular usage.
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Apple's power rating for its Lightning cable is 5 Volts DC carrying 1.8 Amps of current equaling 9 Watts of power.
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How much electricity does a UK home use? Although the average UK home uses around 3700 kWh/year, that doesn't mean yours should.
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Most computers are built to use up to 400 kilowatts of electricity per hour, but they usually use less than that. The average CPU uses about as many kilowatts per hour as the typical light bulb. Any computer that's running on a Pentium-type processor uses about 100 kWh.
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A window AC unit can use anywhere from 500 to 1440 watts of electricity to run, while a typical central air unit in the average sized home uses about 3500 watts.
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According to Defra, an LCD TV uses about 96.9 watts of electricity when on. The average household watches 2,006 of TV a year which would cost around £36.92* in electricity. We're all guilty of leaving the TV in standby mode from time to time. When in standby mode, a LCD uses about 1.9 watts.
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Simply turning off your PC when it's not in use can save even more electricity. CNET Labs tested the energy consumption of a mix of desktops and laptops recently and found that a mainstream desktop, on average, uses roughly 100 watts when idle. Under heavy use, that number jumps to 145 watts.
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In the case of iPhones, "fast" charging occurs at 7.5 watts. Although there are some Qi chargers that manage only 5 watts, many now produce at least 10 -- more than enough for fast iPhone charging. Of course, if you're just charging overnight on your nightstand, a 5-watt pad is more than adequate.
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Apple gives you the 2.1 Amp 10 Watt charger so it won't take a day to charge your iPad due to the battery being much bigger. Most USB Hubs produce the . 5 Amps even though they have an external power supply you plug into the wall.
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That's 105 watts x 10 hours/week x 52 weeks/year = 54,600 watt-hours, or 54.6 kWh. If you're paying 10¢ per kilowatt-hour, then you're paying about $5.50 a year to run your computer. That's quite a range, $5.50 to $631 a year.
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Completely charging a laptop will cost around 1 to 3 cents in electricity usage, depending on the size of the specific laptop's battery, as well as your electricity usage rate. Small laptops, such as notebooks, generally have a 30-50Wh battery capacity, costing 1 to 1.5 cents to charge.
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The cheapest laptop from Apple starts at $999, but if you sum up all the software costs, Windows PCs are 3 times more expensive than Macs. A Mac is around $454 more expensive than a PC, saving up to $543 per Mac, compared with a similarly configured PC.
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You use it for two hours a day, five days a week. That's 105 watts x 10 hours/week x 52 weeks/year = 54,600 watt-hours, or 54.6 kWh. If you're paying 10¢ per kilowatt-hour, then you're paying about $5.50 a year to run your computer. That's quite a range, $5.50 to $631 a year.
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Buried within the hardware regulatory information for the iPad Pro, it's revealed that the 12.9-inch tablet can use 14.5 volts at 2 amps, which is equivalent to 29 watts. However, the iPad Pro only ships with a 12-watt power adapter.
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How much energy does a window air conditioner use? 1.2 kWh x $0.25 = $0.30 per hour to run your window air conditioner. At 8 hours a day for 125 days of summer, your window air conditioner will have an annual running cost of $300 a year.
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An air conditioner uses roughly about 5-9 times as much electricity as a fan. While the amount may vary from model to model, this rule holds true for all of them. Even on the low setting, an air conditioner uses as a very large amount of electricity when cooling. Fans are much more cost-effective in terms of energy use.
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To conclude, we'd suggest that a laptop computer would use around 30W off the DC power supply, and say 40-50W after inverter losses. An 80 watt solar panel should easily run a laptop computer all day in say the Brisbane area. The same solar panel will, on average, only run the desktop computer for a 1-2 hours.