The Nested High Voltage Generator (NHVG) is a high voltage accelerator/power supply topology which can potentially satisfy a variety of requirements for a compact, reliable inexpensive DC accelerator in the 0.25 10 MeV range. Applications for this technology include the generation of high voltage, high current pulsed electron beams for microwave generation (for example in the NLC or Next Linear Collider), medical product sterilization, polymer curing, waste water sterilization, waste water remediation, and medical waste sterilization. This technology has recently been demonstrated in an accelerator which has operated at 500 kV with an electron beam in a 36 inch long, 17 inch diameter device. In this paper, we briefly describe the technology, and the capabilities of our 500 kV machine. We also describe the capabilities of a machine of further reduced size.