Dc-dc power modules come in 200 to 425Vdc range

TDK-LAMBDA AMERICAS PH-A280 series dc-dc power modules with high voltage dc input operate from a wide range dc input of 200 to 425Vdc, which is widely used in HVDC (high voltage dc current) applications. Product range now includes 50, 75, 100, 150 and 300W outputs. Model PH300A280 comes in four output voltages 12V, 24V, 28V and 48V, with outputs that are adjustable over a very wide range of -60% to +20% to suit non-standard voltages. All modules operate at full load over a baseplate temperature range of -40 to +100°C. http://www.tdk-lambda.com