To get email notification when someone adds to a thread you're following, click on the star in the thread's header and it will turn yellow; click again to turn it off. To edit your profile, click on the gear.
The Wall has a powerful search engine that will go all the way back to 2002. Use "quotation marks" around multiple-word searches. RIGHT-CLICK on the results and choose Open Link In New Window so you'll be able to get back to your results. Happy searching!
In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.

Low watt pump

oldsolaroldsolar Posts: 7Member
I’m looking for low watt pumps, line AC most of the time with solar inverter AC power during outages. Minimum power consumption is the goal. As planned, the system will be ½ “copper pipe, drainback to 10G atmospheric pressure tank, head to collector 6’.The second loop is the HX in drainback tank to 80G storage, head from storage to drainback tank HX is 9’. I’m looking at Taco 007 1/25hp at 80w.I would like a lot lower consumption. How can I get there? Any suggestion would be great.
· ·

Comments

  • SWEISWEI Posts: 4,734Member ✭✭✭✭
    edited November 2012
    AC powered ECM pump

    Check out Laing Thermotech http://completewatersystems.com/product/e-series-brass/



    Also available with a B&G label.
    Post edited by SWEI on
    · ·
  • hot rodhot rod Posts: 3,736Member ✭✭✭
    Grundfos Alpha

    is what i have on a couple of my DB systems. It has 3 fixed speeds and consumes about 1/2 of a standard wet rotor circ.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
    · ·
  • Kevin_in_DenverKevin_in_Denver Posts: 588Member
    Only Friction Head on Second Loop

    On the second loop, you don't need a pump with 9' head capability. That loop is full of water all the time and it's at city pressure. So you just need to overcome the friction head at a flowrate of 1-3gpm.



    This pump is worth looking at for the second loop because it only pulls 9W :

    www.sun-pump.com
    Superinsulated Passive solar house, Buderus in floor backup heat by Mark Eatherton, 3KW grid-tied PV system, various solar thermal experiments
    · ·
  • oldsolaroldsolar Posts: 7Member
    Low watt pump 12v

    Those 12v low use pumps look good. Could be wired directly (through controller) to bat bank with reasonable gauge wire. Now I understand about head and friction head which means designing for lowest energy use is more doable.
    · ·
  • oldsolaroldsolar Posts: 7Member
    more on low energy pumps

    Does anyone know were “sun-pump.com”went? I can’t seem to access the site.

     Low consumption 12v small size hot fluid pumps seemed just right. Any ideas on another maker of a pump with spec like theirs.

         12 to 24 v dc @ .8 amps 2.6 gal per minute, max lift 7’6” or 1.2 amp for 9’ 11” lift.
    · ·
  • hot rodhot rod Posts: 3,736Member ✭✭✭
    several choices

    March, ElSid, B&G/ Laing. the B&G Laing is a very nice, high efficiency pump, 8-30V I believe.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
    · ·
  • Kevin_in_DenverKevin_in_Denver Posts: 588Member
    Superinsulated Passive solar house, Buderus in floor backup heat by Mark Eatherton, 3KW grid-tied PV system, various solar thermal experiments
    · ·
  • Kevin_in_DenverKevin_in_Denver Posts: 588Member
    Superinsulated Passive solar house, Buderus in floor backup heat by Mark Eatherton, 3KW grid-tied PV system, various solar thermal experiments
    · ·
This discussion has been closed.

Welcome

It looks like you're new here. If you want to get involved, click one of these buttons!