How to supply power to Nuvinci harmony from 52v battery controller

So I have a Nuvinci N380 with the harmony controller, and reading the specifications it seems that the harmony controller needs 18-44v to power it. I have a 52v 17.5 Ah battery and was wondering if it would even possible to power this thing off it.

Any help or advice would be greatly appreciated

How much current does it need?

If it's not a lot, there's quite a few printer power supplies that output in the 20-30VDC range, that will probably run off your battery (wired to the prongs on the AC cord), that you can likely find at your local goodwill or other thrift store, if you don't have one already just laying around.

Other AC adapters (wallwarts) may also work, as long as they are switching supplies, lightweight rather than the old heavy transformer type.

Otherwise, you can find DC-DC converters for sale all over the internet for your voltage ranges; you just have to get one that can output enough current to run the Harmony.