Periodic battery service is essential to the health of flooded lead-acid batteries.  Adding water to the electrolyte is the primary job in a typical monthly routine, a task that is tedious and moderately hazardous.  A single point watering system turns this troublesome chore into a breeze!  A special valve fits into the filler neck of each cell, replacing the original battery cap.  The Millennium SPW system works by replacing the batteries existing vent caps with patented valves that are interconnected with tubing, allowing the user to fill all cells of the battery from a single remote location. Each valve independently shuts off water flow to the cell when the proper electrolyte level is reached, allowing the batteries to be filled perfectly every time without even having to look at the batteries.

This results in having each cell filled to the optimum level, with no chance of battery contamination and drastically reduced hazard potential to YOU, since you don't need to open a single cell cap!  No funnels or flashlights, no spill or mess, no back strain from bending over your batteries, and no direct exposure to open cells and electrolyte.  Each valve has a small cap to allow insertion of a battery hydrometer so you can still monitor specific gravity without the need to remove a valve.  How does it work?   Starting with a fully charged battery, simply connect the small hand pump to the system, drop the hose into a bottle of distilled water and squeeze to pump!  When all of the cells are filled to the perfect level, all of the valves will close and no more water can be pumped.  Disconnect the pump and you're finished!


Flow-Rite products are engineered for all the major battery brands, so the fit is perfect, the installation is trouble-free, and the electrolyte is maintained exactly to the battery manufacturer's specification.  A single point watering system is more than just a convenience.  Maintaining the electrolyte at the proper level is essential to getting the longest life from your battery investment, and making that chore into a simple and easy task means that you are more likely to do it on a regular schedule as you should.  Flow-Rite systems make battery watering fast, easy and safe.


Flow-Rite Millennium series single-point watering systems are now available for Hup Solar One batteries, making the best renewable energy battery even better!  Single point watering systems are also available for most other brands such as Trojan and Surrette.  Millennium Pro-Fill valves are date-coded and carry a 5-year warranty with the manufacturer.  

YES! We use the Millennium SPW system on our Hup batteries here at Voodoo Solar!  Photos below.

>INSTALLATION VIDEO (15Mb, not for dial-up)
>MILLENNIUM SPW BROCHURE (PDF)
>WARRANTY
>FLOW-RITE HYDROMETER

Flow-Rite Millennium SPW for Hup Solar One batteries:

12 volt, 6 Cell Kit                               $150
24 volt, 12 Cell Kit                             $250
48 volt, 24 Cell Kit                             $450
Handy Pump (required)                     $20
Battery Hydrometer *                        $20  

* special hydrometer with thin filler tube to fit into small cell access hole, not temperature-compensated.


Adding SPW (single-point watering) to our Hup Solar One batteries here at Voodoo Solar was an easy job!  The only difficult part was doing a thorough cleanup of the batteries and connections.  Since these batteries have been in service for 5 years, it was a good opportunity to remove and clean the cell-interconnect bars and wire brush all the terminals.  After everything was cleaned, installing the Flow-Rite SPW was a snap, and took less than 30 minutes.  Here are some photos to show how the installation looks on a 24-volt Solar One battery set.

Note the fill connector at the end of the hose at lower right.  This connector snaps into a mating connector that is attached to the pump unit (not shown).  Simply attach the pump and you're ready to water your batteries without hazard or mess!

Hup Solar One batteries come equipped with a green "flip-top" cap that is easily removed to allow installation of the Flow-Rite valve unit on each cell.  The valve ensures that the water is filled to the precise factory specification.

The red cap comes with the SPW kit and simply closes the unused hose connectors.  The small blue cap allows you to insert the hose of a Flow-Rite hydrometer so you can take specific gravity measurements without removing the filler valve.  Any hydrometer could be used if equipped with a filler hose small enough to fit in the small hole.


Flow-Rite single point watering systems are available for most other battery brands at similar prices.  Contact Voodoo Solar to get the right system to fit your batteries!  Use the link at top-left to go to Voodoo Solar's main battery page.