Sewer Pump 1/2HP 120vac / DR2424 [RE-wrenches]

[Windy Dankoff]

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>>Has anyone had experience using a DR2424 to run a 1/2 hp 120vac sewer pump.
>>All my pump experience is either DC pumps or ac pumps using the SW4024 or
>>4048.  I have only installed one DR2424 so far and it is only running a
>>freezer and furnace.  This pump will be pumping up to a mound system.  The
>>inverter will be dedicated to this one purpose so their are no other load
>>issues.
>>
>>John Blittersdorf
>  >Central Vermont Solar and Wind

John,

If the inverter is dedicated to only that task, it may be more 
cost-effective to use a marine bilge pump. It's made for a very 
similar task.

The pump would probably last for years, in such short-term use, but 
there may be an occasional premature failure. If reliability is 
vital, consider installing two pumps so that when one goes out, the 
other still runs.

I'm not saying DC is definitely better in this case, but it would be 
much cheaper and (for what it's worth) much more energy-efficient.

Windy

===============

>Hey Windy, I had a fellow with a 240 AC sewage pump lifting some 35 feet to
>an uphill mound. That is a little worse to start given the transformer too.
>I wanted to suggest a marine macerator pump or whatever but was unsure of
>their lift capability.  So can you tell me the range available for lift, and
>where to get one in 24 volt version?
>
>Steve Willey   www.backwoodssolar.com
Backwoods Solar Electric Systems

Marine DC bilge and macerator pumps are not designed for such high 
lifts (that would be a big boat!). I've only seen about 15 ft. max 
for bilge pumps.

Oh yes ... the Sunmotor Floating Submersible pump would be a very 
long-lasting DC alternative to the cheap bilge pump.  Also, they go 
to greater than 35 ft. lift.  Pricey, but long-lasting and efficient 
(magnetically coupled). It can be submerged without it's float.

Windy
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