What is power. Power is how much strength is required to push an article. Before knowing how to calculate the power, Just understand how the power is scale . Power scaled by (W) Watt. Power can be calculated as followed. Power(W) =Current(Ah) * Voltage (V). A -> amperes. V->Volt W -> Power Example 1 A video uses 30 A at 12 V. Its power requirement in watts is: 30 A × 12 V = 360 W Example 2 A pump uses 10 A at 48 V. Its power requirement in watts is: 10 A × 48 V = 480 W Example 3 A light uses 1.5 A at 12 V. Its power requirement is: 1.5 A × 12V = 18W Example 4 If a refrigerator using 120 W requires a current of 10 A, what voltage is present? ?? V × 10 A = 120 W 120W ÷ 10A = 12 V And Final one : Practical Question If a 24 W light is connected to a 12 V source of electricity, how much current will flow? 12 V × ?? A = 24 W 24 ÷ 12 = 2 A What is Energy? The terms power and energy are often confused....
Why Solar energy? 1. Cost effective 2. Less maintenance 3. No dependency 4. One time investment 5. Get back the investment in two years 6. No power interruption.