how much solar power do i need to run a laptop?
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Step 1. Buy a solar panel that is powerful enough to run the computer you want to use it with. Small netbook computers use 45 to 60 watts of power, but a larger laptop or gaming notebook may use as much as 90 watts.
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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 solar system between 500 watts and 5 kw is most in demand. For running an AC at home, at least 5 kw system will be required. The government provides a direct subsidy of 30 % on the solar system of above 10 kw which are mostly installed in offices", said the dealer.
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Key Takeaway: Estimate 200 watts of solar panels per 100 amp hours of useable battery capacity (100Ah Lithium or 200Ah AGM). BUT KNOW THIS: More solar panels are just going to charge your battery faster, or more adequately in low light conditions. If you have 400 watts of solar, you will charge twice as fast.
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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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How many solar panels do I need to power my house? The typical homeowner will need 28 – 34 solar panels to cover 100% of their energy usage (dependent on location and roof size).
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While shutting the computer and monitor completely down is the best choice for saving on electricity costs, today's computers use very little power when in sleep mode. A laptop in sleep mode will use about one to two watts of electricity and a desktop will use one to five watts.
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A complete desktop uses an average of 200 Watt hours (Wh). This is the sum of the average consumption per hour of the computer itself (171 W), the internet modem (10 W), the printer (5 W) and the loudspeakers (20 W). Assuming that a computer is on for eight hours a day, the annual consumption comes to 600 kWh.
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A 1 kilowatt hour is 1 kilowatt for an hour, so a device that uses 1,000W and ran for 5 hours would need 5 kWh of power. Laptop batteries will sometimes say what their watt hour rating is. If it's rated at 150 wH, this means it can output 150 watts for an hour. Most laptop adapters are 60-90 watts.
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To get an idea of how much power your PC uses, you'll want to visit OuterVision, which is a free-to-use power supply calculator. This service is highly detailed, works for both laptops and PCs and is used by both computer hardware professionals and enthusiasts alike.
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A desktop PC typically uses around 100 watts of electricity, the equivalent of 0.1 kWh. This means that if a PC is on for eight hours a day, it will cost 10p a day to run the laptop (based on an average energy unit cost of 12.5 p/kWh).
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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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Assuming that you use about 37 kWh per day, you would need about 37 solar panels to meet 100% of your average energy needs. Based on your current usage, how much of this do you want to offset with a solar power system?
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So that's 30 kWh per day or 1.25 kWh per hour. Your average daily energy usage is your target daily average for to calculate your solar needs. That's the number of kilowatt-hours you need your solar system to produce if you want to cover 100 percent of your energy needs.
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Laptops Use DC Power All laptops use Direct Current (DC) power to operate. DC is electrical energy that flows consistently in one direction. Ideally, the power flows into the laptop. Most wall outlets use Alternating Current (AC), which varies constantly, but results in a positive flow of current.
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A 120W solar panel can supply between 6 and 7.5 Amps on a sunny day, for most of the sunlight hours of the day. If we assume that only 1/3 of the day is sunlight hours then it is safe to assume that the panel can supply between 6 and 7.5 Amps for this period.
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A General Solar Equation The average energy needs of a U.S. household is a 6.62-kW solar system to match the 9,000 kWh of average energy usage by U.S. households each year. And, the typical solar panel makes 320 watts of electricity in ideal sunny conditions.