Warpspeed
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But, inductor value is have alredy designed it for particular power arting and it came out to be 30-40uH for 75Wpanel, 90-100uH for 110W panel and 200uH for 350W panelIt may need a physically bigger choke with heavier wire, or two mosfets in parallel, or much thicker external wiring to solar panel and battery.
Today plugged once again step by step.
First --> I connected 110Ah directly to solar and panel voltage dropped to battery voltage but, same didnot happen for 7Ah battery.
Another thing i observed was there must be a finite resistance across G-S(say 50K) terminal of mosfet to turn it off under absence of gate drive because when it was not present MOSFET remained on irrespective of the gate drive signal.
MOSFET+capacitor with battery across capacitor no inductor, voltage across solar=15V and when MOSFET+inductor+capacitor with battery across capacitor solar voltage =16V.
the connecting wires were heating a bit
The solar panel i mounted rooftop and we are working on ground floor.
The wire thickness used for getting solar o/p to ground floor is high but, only the short connecting wires (other miscellaneous wires required for completing the circuit) are thinner and max drop is across them. Anyway if they account for some resistance they are unavoidable i need them to make proper connection in the circuit else how can i built connection without those wires.If this is a long distance, then it could account for 1V drop or more. Your connecting wires ought to be thicker gauge.
as vmpp battery voltage=12V
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