Searching a powerful (NiMh) battery charger

[manu]

Hi,

I have 24V (20S) NiMh battery packs (from 10 Ah to 30 Ah).
I cannot find a reasonably powerful (250W-300W) battery charger for this kind og capacity.
My Graupner Polaron Pro charger limits the battery profile at 9900 mAh for the NimH (kinda stupid, ...)
Most of the cheap battery chargers allow 1-15S cells. When they are designed for 20S (24V) or more, they are ridiculously weak (10-50W).

So if you know professional (or not) equipment for 24V 20S NiMh in the 250-300W+ range, let me know!

Thanks!