[SOLVED] dc dc converter configuration

[engineer1000]

I am powering a number of solar cells in series and parellel. I have one dc dc converter with mmpc connected to the cells. I have the output of this dc dc converter connected to the input of another.
Would it be resonable to back the first dcdc converter non isolated fed into the second dcdc converter which would be isolted.
My logic is the first dcdc converter could be matched to the koad of the second since the second is isolated to get the max efficiency.
Does thisd make sense???

 

[BradtheRad]

A load is a certain amount of impedance, whether isolated or not. If the second converter is not drawing a stable load, then your MPPT will have trouble operating at a stable level.

You'll have to do some custom designing, naturally.

Isolation can mean galvanic isolation, as when a transformer intervenes. Is one in your second DC-DC converter? As a general principle, MPPT adjusts things so that maximum current is flowing through it. It doesn't care whether or not you have isolation.