Wow! I did not realise my question was so involved!

my setup at this stage is...
3.6V/600mah battery (NiMh)
fast charge current 10% + cct = 65ma
trickle charge current 1% + cct = 11ma
Solar cell 12V 1.26W (Vmax 18V, Imax 160mA)

Charge detection is via voltage peak (4.3V but more testing
needed..), don't really wish to do temperature if possible.

Given that I have a 'wish' for a fixed current output, how
about using an SMPS as a current regulator?

I know it is not going to be looking for a peak but I am
not sure I understand how MPPT would work with this setup?

Cheers
Peter Mcalpine

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