Watts? How Many Watts Does My Device Need to Supply?See Also: Solar Charger Guide To select the correct solar device for your needs, you may want to find out what watt rating you need (pun is accidental). A watt is a measurement of how much electrical power is produced by a device. To find out how many watts you need for your device, look at the adapter of the device, which you use to charge it from a power outlet. Look at the output rating of the adapter. It should tell you how many watts the adapter generates. If it doesn't contain this information, it should contain the ratings for amperes (amps) and volts. To find out the watts rating of your device, simply multiply the amps times the volts. The following is the equation: Amperes x Volts = WattsIf possible, your solar power supply should have at least the same watts rating as the item you wish to charge. If it has less watts, you can still use it to charge your device, but it will take longer than usual. If your solar power supply has more watts than the item you wish to charge, it will probably improve the charging speed. To make things simpler for you, we have created a grid which will give you an idea of
what type of solar charger you will need for your equipment Solar Charger Guide.
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Keep in mind that electronic devices do not always use the same amount of power. For example, a laptop which uses 60 watts may need 60 watts when it is running at maximum power usage, and charging its battery at the same time as you are using it. But this does not mean that it always needs 60 watts, or that you can only charge it with a 60 watt charger. A charger with less wattage may take longer than a wall socket, but it can still charge the laptop. Remember that bigger solar panels usually supply more wattage, and will power your devices more quickly. But "bigger" usually also means "heavier" and "more expensive." So you will have to decide what is the most important. A rule of thumb is to get the biggest charger that you can afford, taking into account the weight and cost. To
understand better what watts, amperes, and volts are, please see the glossary on this
site.
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See also our Solar Charger Guide to estimate which Solar Charger you need and how many watts you will require.
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