Is 240v really necessary?

[SilverbackMP]

Actually, if I configure it, my three MPP 6048's can output three phase 120/208.
The bigger machines in the shop already had VFD's on them since no 3-phase was available from the utility, I just kept those rather than building a 3-phase system, which would then require me to balance that 3-phase power, ah, no thanks!

I'm actively looking for 3 phase stuff so I can VFD them. Mostly a motor for my existing 5 HP 240v compressor and a complete 5HP wood planer. Just so I can ramp them up slowly. My inverters (4x SI) can handle the surge, I just don't want to stress them.

 

[SparkyGage]

I'm curious if you specifically need AC pumps? So many DC pumps exist for different applications that it might be more efficient - provided you don't already have AC pumps in place.

 

[12VoltInstalls]

I'm curious if need AC pumps? So many DC pumps exist for different applications that it might be more efficient - provided you don't already have AC pumps in place.

The issues with DC pumps are several.

Not that they are bad, but the installations usually are a good distance from the power supply; higher voltage AC doesn’t notice the same way.
Secondly, the cost of larger cabling for lower voltage, higher amps DC is a factor to consider.
Lastly, the sheer volume of 120V/240V product at the high-efficiency end of the market usually can land you where you want to go rather than having to choose from a limited selection.

 

[OffGridForGood]

I feel DC pumps work best from a near-by surface/shallow bury tank, pumping a short distance from the point of use. Keep the cables short and the pressures low, like an RV set up really.

 

[SparkyGage]

The issues with DC pumps are several.

Not that they are bad, but the installations usually are a good distance from the power supply; higher voltage AC doesn’t notice the same way.
Secondly, the cost of larger cabling for lower voltage, higher amps DC is a factor to consider.
Lastly, the sheer volume of 120V/240V product at the high-efficiency end of the market usually can land you where you want to go rather than having to choose from a limited selection.

Oooh, yeah, I can see now where that would definitely be a factor. I was thinking about the inverter loss going from DC to AC and wasn't really thinking about it being a DEEP well (went back and reread the original post).