I found my original spec sheet from Lofrans
and the Albatros with 1500 Watt motor is rated for 1320 lb lift
at 32-43 feet/min.
We power down when lowering chain. Our motor is reversible. I understand what you mean about the pawls only engaging when raising chain. I struggled with this myself.
When lowering chain, you just tighten the nut on top of the capstan. This will provide enough friction internally to lower the chain. If while sailing we have been in some seas and the chain has moved about in the locker, then the chain will sometimes fall over upon itself. When this happens the windlass is unable to pull the chain out of the locker and I have to clear it by hand. All of the strength of the windlass is for raising, not lowering.
But it absolutely will lower the anchor and chain under power.