From sun to the grid!!!

So, today I finished implementing the full string for solar energy i.e. test the power from PV cells to grid to charging and discharging the capacitor. The schematic for this circuit is shown below.
                                                 

Schematic showing for solar string

Testing the schematic

Here for testing purposes, I have used 10,000 micro farads capacitor rated at 16V. (waiting for the capacitor).

The voltage across variable resistor was 11.8 V (grid voltage =12V).

Then the solar power was also tested to charge the capacitor. As shown in schematic, the capacitor gets charged thorough the schottky diode to around 15V. Diode is necessary to prevent the capacitor discharging during charging cycle momentarily. As capacitor discharges, another converter was used to have constant 12V (grid voltage).