12 volt charging from Jackery 240 or other ones

Rudy - September 19, 2020

Hello.

Have a new dc/dc 20 amp battery charger. Would like to connect it to my starter motor battery at the input of the charger then have the output go to a cigarette lighter socket, which will charge a jackery 240 portable power station. Will also use a 12 volt wire at D+ to sense ign on.

Is this a feasible use of this Renogy 20 amp charger?

Thank you , Rudy