Dual 50v DC boost converters in parallel?
If you want to parallel supplies you typically run a circuit like this:







simulate this circuit &ndash; Schematic created using CircuitLab

For the modules in question this may or may not work, the problem with DC to DC converters is they need to be synchronized so they don't work against each other (ie: one switches off and is charging while the other is switching its inductor on). If they have some way to sync their control loops then (or a sync pin) then this would be a good indication that they are parallelisable. You could easily smoke these supplies if they were not working in sync as they would source current into each other and the full power that they source would be dissipated in the components.  

If you create a sufficient filter on the output this may work too with an LC filter, I've parallalised some DC to DC converters this way.