The bulbs are 6 watt and I want to know how many I can run off a deep cycle battery (100a/h). I only have a 5.5 watt solar panel to charge battery so do not want to drain it too fast.
2006-11-08 16:04:29 · 2 answers · asked by Anonymous in Home & Garden ➔ Maintenance & Repairs
Working it out, 6 Watts / 12 Volts = 500 mA. That's 1/2 amp/hours per lamp. So, if you had 10 of them, it would be 5 amp/hours total. If you have a 5.5 watt solar panel, you'll have to realize that 5.5 watts is the maximum output on a bright day.
You'll need take into account the number of lamps, the duration that they are on per night, the (average) output of the solar panel, and the charging time per day. It looks like even one lamp will eventually drain the battery. If you had just one lamp, the battery would last 200 hours without charging. If you leave the lamp on during the entire night, and charge effectively for say 10 hours per day, you would be looking at (I'll use 6 watts for the charger to make the math easier) 5 amp/hours of charging, which powers the lamp for 10 out of 14 hours. This means that 2 amp hours for the single lamp are not made up for in the daily charging. With one lamp, this means that the battery would have sufficient charge to power the lamp for about 50 days.
2006-11-08 16:22:45 · answer #1 · answered by Deirdre H 7 · 2⤊ 0⤋
it will use very little power
2006-11-09 00:08:17 · answer #2 · answered by Anonymous · 0⤊ 0⤋