Advice needed on a 10 Ah battery and charger

[AIIligator]

I have a small device that I'm trying to power off of a solar panel 24/7. The device consumes about 380 mA at 5 volts. I have already decided that I'd like to try a >= 10 Ah battery. I'll add my own 5 volt voltage regulator.

Battery Space recommended this battery and charge controller. If I purchased it, I'd most likely buy the two items separately since the cost is higher if I buy it already assembled: http://www.batteryspace.com/lifepo4b...erstorage.aspx

I'm concerned with battery life and being environmentally friendly, and had originally considered an ultracapacitor bank, but the cost was too high. I'm now leaning toward LiFePO4 batteries.

What would others recommend? I haven't picked the solar panel yet, and I'll probably do that last.

[Sunking]

I'm concerned with battery life and being environmentally friendly,

What would others recommend? I haven't picked the solar panel yet, and I'll probably do that last.

Well do not worry about the environment with a battery system as none can even come close to offsetting any emissions. A battery system can never generate more energy than it takes to make the system.

OK even though your device will only use 42 Watt hours per day, if you use a 12 volt battery and a 5 volt regulator shunt or series regulator the battery have to deliver 12 volts x .38 amps x 24 hours = 110 watt hours, so that means you need a 45 to 50 AH 12 volt battery. The solar panel will need to generate 220 watt hours per day minimum during your shortest daylight months. So depending on your location and insolation the panel wattage will need to be anywhere from 50 to 200 watts.