Posted by Anti-Spam on May 29, 2006, 9:17 am
Please any recommendations for 12V pumps that will run off a PV cell
to pump water round a solar collectorl/tank which are in close
proximity to each other. I am looking for a good trade off between
price and quality.
Posted by anders.michael on May 29, 2006, 4:05 pm
Can't speak for price, as they were on the system when I bought the house,
but I've got two Vortex NP200's : one of them does the solar water heating,
the other does the wood-fired central heating. In four years they've been
perfectly reliable. They look very simple and compact, and are of German
Posted by Steve Shantz on May 29, 2006, 6:30 pm
Ivan Labs makes the El-Sid series of pumps. The PV series is designed
to run straight off a PV panel. I'm using a PV-20, with a 30 watt
panel for my glycol loop, and a PV-3 with an 8 watt panel for the water
side. Works great, but not a cheap solution.
Posted by Gary on May 29, 2006, 9:02 pm
There are some 12V pumps here.
The ElSid and March have a very good reputation, but are pricy.
I put the LVM one in because its so cheap, and lists a high operating
temperature capability -- have no idea what the quality is like?
"Build It Yourself" Solar Projects
Posted by R L driver on May 30, 2006, 12:25 am
Hi there I am in the UK and I'm also building a system, similar to
solar twin, that will use a 12 volt pump. I've been playing with a car
windscreen washer pump 12 volt and less than a fiver to buy. As the
solar twin system ( see their web page) uses a small bore 6mm (1/4")
pipe a car washer pump is ideal , the rate of circulation is low , to
keep the water temperature high and it uses a direct sytem that feeds
the hot water to the top outlet on the tank . At 2 volts , 1/2 an amp
the pump delivers 2 or 3 litres a minute. At twelve volts it shoots
water across the workshop. I know these are cheaply constructed pumps
but at 2 or 2 volts they should last ages. Another option if these fail
to work in practice is computer cooling pumps.
steve the grease