Qustion for someone experienced with Grundfos SQ-FLEX [RE-wrenches]

Todd Cory, Mt. Shasta Energy Services toddcory at finestplanet.com
Sun Feb 29 10:23:38 PST 2004


For this application I would consider a bank of those super capacitors. I once saw
Larry Elliot start and run a 2? HP air compressor several times off a set these
caps feeding a FX inverter. Larry you want to add to this discussion?

Todd




Doug Pratt wrote:

> Steve,
>
> I agree with Christopher that a small sealed battery pack would
> eliminate many potential system gremlins. A little ballast to even out
> any voltage variations, fluctuations, or surges is going to make the
> system more reliable in the long run. I think you could make the battery
> quite small, say 30 to 50AH @ 48 volt, and then use a diversion
> controller to switch the pump off if voltage drops too low due to some
> hydro or water supply problem. Just replace the battery pack at 3-4 year
> intervals.
>   I agree with your pump choice. You can't beat the Grundfos SQ Flex for
> efficiency, reliability, and life expectancy. I've sold a lot of them
> the past couple years with only pleased reports back. I worry about
> lightning, with all those electronics down the hole, but the Flex is a
> spinoff of the SQ line that Grundfos has been installing for years, so
> I've got some faith in their experience.
> Cheers,
> Doug Pratt
>
> ----

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