How to connect solar panel to boost converter
The huge difference between a battery which is a voltage source and a PV panel which a current source is impedance.

A charge needs a low impedance based on the need for a low voltage drop to rise in current ratio.

Any time voltage is transformed up by N, impedance is also transformed down by N\$^2\$ thus stressing worse  your design problem of impedance mismatch.

Your goal , should you wish to learn, is to compute the required PV source impedance to drive your effective load impedance using   : Load ESR/N^2=Voc/Isc=Zsource=V/I @ Pmax.    


for OC=open circuit and SC= short circuit


Z(L)=2pi*f * L