My inverter doesnt survive cranking. Ive been searching for solutions but i cant find an answer as i dont understand those diagrams. Is there a way to connect my inverter to survive cranking with my main battery and a capacitor?
have you searched for tank circuits? If not, do that, and spend some time reading. There are a few diffrent ways to make your inverter survive crank. One of the more simpler ways is to just add a second battery. Or, again, take a look for tank circuits. Either way, it's very unlikely that a capacitor will solve your problems.