How can I improve the solar water pump in my bird bath? Answered
I have a small electric water pump in my bird bath, powered by a small solar panel about 4.5" square. According to the literature that came with the pump, it runs on 7V/1.05W of power. The panel battery is 7V/1.2W.
In practice, this means that the pump runs continuously when the panel is in direct sunlight (about 5 hours a day) and sporadically when it's in the shade.
I would like the pump to run continuously more often. I'm guessing that means I need a storage battery with higher capacity and/or a larger panel. Harbor Freight sells this item, which is 24VDC/1.5W. http://www.harborfreight.com/15-watt-solar-battery-charger-68692.html
What kind of battery would I need, and do I need a regulator as part of the system as well?