# Noobie is trying to match a solar power bank and a wireless camera

my dear friends all around the world!

I'm very interesting about this cool solar power thing, and I really want to start connecting all of my stuff to panels and so.

But for my first and ,hopefully, successful try, I will simply use a simple (apparently not so simple for me, otherwise I wouldn't be here..) solar power bank. No need for charger regulators and other exciting things that might burn down my roof top..

The solar power bank is 20Ah (but I don't know how much watt per hour. The nice seller hasn't replied me yet) -

http://goo.gl/0svXM6

The camera is 12v/2A and 6-7W, and have to work 24*7 -

http://goo.gl/MKM0yR

That is the question.

I really appreciate your kindly help. A lot.

Thanks,

Roni

Note: I really did tried to understand it by myself, but I still have doubts (and those items aren't cheap at all when buying bulks of them as need to). I'm a programmer, so I did have a few lessons in electronics. 10 years ago..

Few of the posts here that help me the most -

Solar panel & battery math verification

Solar panel and 120mm Computer fan

Why isn't the solar panel charging the battery?

Battery recharging via solar panel

• 20Ah is a battery capacity. It means it can provide 20A for 1 hour. Or 10A for 2 hours. Or 5 for four. You've got the idea. As it has variable output voltage, it doesn't make much sense, as as higher the voltage, the lower the capacity should be. Generally the capacity in watts per hour will be just the Amps-per-hour multiplied by the voltage. – Eugene Sh. Sep 1 '15 at 17:04
• @EugeneSh. Well, I think that the sense is that, as you say, although the capacity is indeed lowering, it comes on the expanse of the hours the battery can give us (once again, I'm not an expert. but it did make sense to me). So, you are saying the the Watt per hour, of the cam, is - 12(v)*2(A) = 24W Than it is good for me, since the power bank is 12*3(max A). So, for how many hours can the cam work? – roni Sep 1 '15 at 17:19
• Anyway, if you are going to rely on the solar energy only, it probably won't work. I don't believe the recharge rate would be sufficient to both power the camera and recharging the battery. – Eugene Sh. Sep 1 '15 at 17:23
• Note that the output of the battery module is described as "12V/16V/19V/3A", so at 12 volts it should be good for 36 watts. – WhatRoughBeast Sep 1 '15 at 21:55