Maybe something like this (I wonder if they make it themselves or OEM it): http://www.poweringthenetwork.com/modular-dc-converter/
500 watts is a lot of power. I would probably just split the loads between two Mean Well RSDs, or use a small DIN rail converter for each load, or set up a second battery string (I assume you need both +48 and-48?). If I was running that much off a DC-DC converter, I would probably want N+1 redundancy. From: Chuck McCown Sent: Tuesday, February 02, 2016 12:44 PM To: af@afmug.com Subject: Re: [AFMUG] High Capacity DC -DC converter? You can always get a DC inverter, make 120 VAC, then feed a DC power supply. Any wattage you need any voltage you need. Just mix and match. From: Gino Villarini Sent: Tuesday, February 02, 2016 8:47 AM To: Animal Farm Subject: [AFMUG] High Capacity DC -DC converter? Hey Guys WE are needing a higher capacity DC-DC converter (500 watts) Redundant if possible. Meanwell RSD only go up to 300 watts... Any ideas?