https://www.ebay.com/itm/50W-100W-0-01-5k-Ohm-Watt-Shell-Power-Aluminum-Housed-Case-Wirewound-Resistor/182880437622?hash=item2a94860576:m:mvM4eHzzstbp3f6b6vEHGfw:rk:10:pf:0Two resistors
Two momentary engine starting pushbutton switches.
Two circuits
Inverter positive to chassis negative
https://www.ebay.com/itm/50W-100W-0-01-5k-Ohm-Watt-Shell-Power-Aluminum-Housed-Case-Wirewound-Resistor/182880437622?hash=item2a94860576%3Cimg%20src=the other
Inverter positive to battery positive
You need to have the big cable battery positive disconnected on the boot down and boot up.
Controlled capacitor fill and discharge. Note the word CONTROLLED.
From reading all your posts you are sharp enough to figure this out :)
RAMPING inrush always extends service life of capacitors.
The manual discharge deflects quandaries with complex partially nulled control circuits. Call it a manual reboot.
A three ampere in/out bleed is excellent a 150 watt capacity resistor will work fine for this type of limited duty