Hello,
Sadly we don’t, but we are convinced that it is not a problem.
According to the server company the power supplies are not simple redundancy but share their power.
And that is reflected but the measures we made on our side.
We measured a power draw of roughly 850w at peak (which indeed follows your estimation).
That shows that in fact power delivery is capable of more than one unit (750w) , therefore we should have a capacity of 1500w (more than enough) with the 2 units
Thank you for your help !