How Many Watts Solar Panel Do You Ned to Charge 12v Battery Essay Example for Free

How Many Watts Solar Panel Do You Ned to Charge 12v Battery EssayThe wattage of the circuit board exit determine How Many Hours of sunlight youll need to charge the 12 volt battery, so the next piece of information you need to consider is what ar you going to call that 12v battery for, and how quickly do you need it charged up?Heres the math- To figure out how many hours it lead take to charge the battery, premier(prenominal) figure out the output of the solar adorn by dividing its WATTS by its Volts, which will give you its output in AMPS. So. .a 15 watt panel DIVIDED by 12v = 1.25 ampsNext, read the Amp Hour rating on your 12v battery. If we use a 50 amp hour battery for this example. . .DIVIDE 50 amp hours required to fully charge the battery by the 1.25 amp output of the solar panel = 40 hours of direct sunlight to charge the battery. Then add other 10% of time to his number, so figure 44 hours.Some more examples5watt/12vpanel=.42amp and 50amp hr/.42amp=119 +10% = 13 1 hours of sun30watt panel works out to 22hours. 50watt=13hrs 80watt=about 8 hrs.Of course all of these times are based a 50amp hour 12v battery.BTW, Im no expert i just found this equation online 5 mins agone because i was wondering the same thing myself. . Now could anyone tell me how figure out quickly my computer or light or whatever will drain that 12v batteryTo determine how quickly your battery will drain, lets assume that same 50AH battery. You wish to run 2-5W 12V lamps for about four hours each evening and use your small laptop for an hour which has a 50W draw at 18V, so about 80W at 12V. Your use will be 80W/12V=6.7AH + ((2*5W)/12V)*4 hours=3.2AH, or a total of about 10AH per evening. If you allow the battery to discharge to 50% before wanting to recharge it, you can run as described for about 3-3 1/2 evenings per week. If you concurrently have a 30W solar panel charging the battery for 4 hours per day, you will be keeping the battery fully charged it (you will be putting back 10AH per day). This allows for a couple of cloudy days.Hope this answers your question. Remember, watts/volts=amps. Multiply each load by the number of hours you need it to run to defecate ampere-hours. Add all these results together to determine the total draw on the battery.