You would think that APC like most businesses would make any differences in product lines clear. Yet, a quick compare between the 20k PX and 20k VT shows only a few differences.
The PX offers better power factor (100 v 80%), a larger frame, more BTU burned, a louder operation and oddly a better operating elevation. Power capacity, modular flexibility, runtime, extended runtime options, electrical specs are virtually the same.
So for these minor differences why does APC charge almost twice the price ($28.5K versus the VT's 17.1k)?
Looking over the two units... one factor is upgrade-ability. The 20k PX model can be upgraded with the addition of more power suitcases to 40k. Also on the PX, if one of the power suitcases fails, you can configure a N+1 redundancy.
So is that worth $11,000.00?
I dont think so.... but at least if you buy it from us refurbished the difference is only about $5000.
