Win a copy of Compost Teas for the Organic Grower this week in the Composting forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education experiences global resources the cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • r ranson
  • Anne Miller
  • paul wheaton
  • Joseph Lofthouse
stewards:
  • Mike Jay
  • Jocelyn Campbell
  • Devaka Cooray
garden masters:
  • Steve Thorn
  • Dave Burton
  • Dan Boone
gardeners:
  • Joylynn Hardesty
  • Mandy Launchbury-Rainey
  • Mike Barkley

Solar Pool Pump

 
Posts: 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I am looking to move to a purely solar powered dc pool pump.  I found a pump that meets my needs.  It is 72VDC 900Watt pump.  It is designed to run directly from the solar array.  The description recommends 6 panels - 200watt@18v.  The panels are hard to find with that configuration. In other forums, guidance is to provide 1200Watts but no mention of the volts.  One even stated 12 panels - 100W@12V.  I am not sure of the panel configuration, but thinking they would want 3 in series and 2 sets in parallel of 3 parallel. (54V)

Thoughts on if the wattage is more important than the voltage for these pumps or if I need to consider both?  

I could wire these to have 6 in series and 2 sets in parallel to meet both needs. (72V)
I could wire these to have 4 in series and 3 sets in parallel to meet both needs. (48V)

this is where my knowledge seriously breaks down.
Thanks for the help.
 
Posts: 246
Location: Philippines
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
DC motors will run at lower voltage than its ratings at lower speeds of course. So it is better to get a reciprocating pump. they will deliver regardless of speed. There are solar pump sets if you can get one you wont have problems with matching. My friend got a 1hp submersible pump set.
 
julian Gerona
Posts: 246
Location: Philippines
7
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
also try to avoid batteries. That's where your electricity saving goes. Centrifugal pumps needs certain speed to deliver. thus a set battery. Personally I wont go that route. piston/reciprocating pump will be my choice for solar driven. You wont need a battery for this
 
Posts: 55
Location: The Netherlands
4
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
At that Voltage your looking at 12,5-ish amps. I don't know much about pools, does the pump need to run all day or can it also run parts of the day on a timer?
 
Johan Thorbecke
Posts: 55
Location: The Netherlands
4
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
More than a grand for a pool pump, yikes.
 
frank li
pollinator
Posts: 557
Location: Michigan
41
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator

Johan Thorbecke wrote:More than a grand for a pool pump, yikes.



Yes, pools are expensive to own and operate. They are a luxury.

Gallons per hour and gallons per watt equal performance and these will direct drive with the linear current booster/controller.
 
Switching from electric heat to a rocket mass heater reduces your carbon footprint as much as parking 7 cars. Tiny ad:
Wild Homesteading - Work with nature to grow food and start/build your homestead
https://permies.com/t/96779/Wild-Homesteading-Work-nature-grow
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!