how much electricity does it use to charge a mobile phone?
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Cell phones, mobile phones, even smart phones and tablets are very energy efficient because they are designed to run on a battery for a long period of time. Cell Phones use approximately 2 to 6 watts when charging, while a charger left plugged in without a phone will consume 0.1 to 0.5 of a watt.
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The cost of electricity varies greatly by location in the United States. The average cost is $0.12 per Kilowatt hour. You will then multiply the three (power consumption, operating hours, cost of electricity) together to calculate total cost per month.
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Many landline providers now include calls to mobiles in their call allowances, but where they don't, they are typically charged between 10p and 20p per minute. There can also be a call set-up fee (or 'connection charge'), which is usually 23p. Calls between mobiles are normally included in free call packages.
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If you fully drained and recharged your phone everyday, then over the course of a year you would have to feed it about 2,000 watt hours, or 2kWh. At an average price of 12 cents that means that your phone uses about one quarter's worth of electricity per year.
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In my experience the average scooter takes around 5 hours to charge. That means I'd say at most the scooter is drawing 880 watts of power or 0.88kWh. From there we have to look at electric costs. In my city the highest residential rate (assuming I use over 1000kWh per month) is 14.5 cents per kWh.
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Our residential usage charge is a two-tiered Conservation Rate. You pay 8.29 cents per kWh for the first 1,350 kWh you use over an average two-month billing period. Above that amount, you pay 12.43 cents per kWh — what we call Step 2 — for the balance of the electricity used during the billing period.
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Many Appliances Use Just as Much Power When Off Always leaving a laptop computer plugged in, even when it's fully charged, can use a similar quantity — 4.5 kilowatt-hours of electricity in a week, or about 235 kilowatt-hours a year.
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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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How much does it cost to charge the Nissan Leaf? The average cost of electricity in the US is $0.1285/kWh, meaning it costs only $5.14 on average to recharge your Nissan Leaf to the full 149-mile range. Compared to what you'd otherwise spend on gas, you'll save a fortune.
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A watt equals a joule per second. If a smart phone uses five joules of energy every second, then the power of the phone is five joules per second, or five watts. The animation above demonstrates the difference between energy and power.
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The average electricity cost in the UK is around 14p per kilowatt-hour (kWh). So, using a 3kW charger to fuly top up a Nissan Leaf with a 40kWh battery would take 13.3 hours, at a cost of £5.76. With the Nissan's quoted range of 168 miles, that amounts to just over 3p per mile.
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If electricity costs $0.11 per kilowatt-hour, charging an all-electric vehicle with a 70-mile range (assuming a fully depleted 24 kWh battery) will cost about $2.64 to reach a full charge. This cost is about the same as operating an average central air conditioner for about six hours.”
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How much electricity does a laptop use per hour in the UK? A laptop typically uses about 50 watts of electricity, the equivalent of 0.05 kWh. This means that if a laptop is on for eight hours a day, it will cost 5p a day to run the laptop (based on an average energy unit cost of 12.5 p/kWh).
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You also can work from the total kilowatt-hours it takes to recharge the EV's battery. If an EV requires 40 kWh to recharge a fully depleted battery, and the rate is 18 cents per kWh, that's $7.20 for a fill-up.
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That means the average iPhone uses (19kw X 19 GB) 361 kwh of electricity per year. In addition, ATKearney calculates each connection at 23.4 kWh. That brings the total to 384.4 kWh. The electricity used annually to charge the iPhone is 3.5 kWh, raising the total to 388 kWh per year.
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All in all, you'll be paying somewhere between 25 cents and 35 cents per kilowatt hour for your electricity. Where do scooters enter this equation? A charger's output can be measured in watts, and a full charge usually takes about 7 hours.
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Electricity Generated By The System Depending on where your business is located a 1MW system can generate between 1,300,000 -1,600,000kWh per annum. This equates to around 3,500-4300kWh/day on average.