What are the options for the Nato plug in the back?

Clark Kent said:

Do yourself a solid and put some lube on the socket dust cap threads and the plug screw ring threads while you're messing with this project. A few folks have had seized caps. The alloy threads do like to corrode and gall up a bit. I'm using an industrial petroleum jelly but anything that won't react with the cap seal will work. A lanolin product, a dab of rubber grease, etc.

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Thank you for mentiining this. I read about that issue as well. Some caps were seized on requiring replacenent of the plug.

For induction cooking , as opposed to a quick brew up, you need lithium - and plenty of it.

chrsbe said:

Ok a 2000W hotplate would drain the Battery within two espressi. Is it possible to run the Nato plug from the household battery?

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It's just wiring so you're free to reconfigure as much as you like, but running down the auxiliary (2nd, household) battery to make coffee takes away the reason IA designed it the way they have - so the 2nd battery can backup the primary (starter) battery.

Voltage is considered as 'pressure' in an electrical system. The auxiliary battery is acting as a pressure accumulator by storing voltage within the electrical system ready to top up the primary battery if it gets low. In that respect it's a safety system. The auxiliary battery sits quietly off to the side ready to push voltage to the primary battery if it needs help (low voltage detected). For that specific goal, the Smartpass does this in a more intelligent way than a 2-battery parallel 12v system, or a conventional DC-DC charger which is typically one way towards the 2nd battery.

If IA had done a better job explaining their design philosophy behind this system we probably would have stopped trying to second guess their work ages ago.
That said, IA's description of the Auxiliary Battery option in the configurator is unhelpful, even today:

We now know that all loads are wired to the primary battery and the consumer terminal is disabled on the Smartpass 120S (later vehicle builds get a stripped down and unbranded device called the battery combiner). IA's statement that the auxiliary battery can run accessories without drawing on the primary battery is misleading. Accessories ARE drawing on the primary battery but the auxiliary battery will replace the power by trickle charging the primary battery when required.
That loose description is probably why we were all expecting to get a conventional starter + house battery with a DC-DC charger in between.