Steve Harris wrote:
In article ,
(Martin Brown) wrote:
The pumps also work well with a 12v lead acid accumulator or any
other 12v DC 2A supply.
How much do the pumps draw?
Depends how much you want to pump. The pump I had stalled on anything much
less than 8v and 1A.
Guess: 50 mA which would require a 40 AH car battery to be charged
monthly. That's a power of 0.6W let's say 0.5W after losses.
I ran mine at 14v 2A for about 10 minutes a day for greenhouse irrigation
from a big water butt.
Roughly 2 months between charging with a 20Ah lead acid accumulator
(I intended to use solar power but it simply wasn't cost effective)
Also you need a deep discharge battery - car batteries are really only
happy kept well charged for starting cars.
Regards,
Martin Brown