How many watts do you need?
I lived in an off the grid house in Florida and used my Zero to charge my phone, laptop and run LED lights all night. I had a 200 watt 12V DC/AC inverter that I ran off the bikes 300 watt DC/DC converter.
My laptop charger used 35 watts, my cell phone used 5 watts and the LED lights all added up to about 10 watts. So I was only using about 50 watts of the 200 available from my inverter, but at night that's all I needed. During the day, the solar would power the fridge, and other big items. At night with the door closed the fridge didn't need to run and only went up about 1 degree, but I had it set for a colder temperature during the day and filled it full of water bottles in the freezer part too. Worked perfect.
For items that will run on DC, you'd be surprised how many will but do at your own risk, you can simply tap off the Anderson port and put a NEMA 5-15 or 5-20 socket at the end. Good for powering electric chainsaws in the middle of the woods, incandescent lightbulbs and other things. Hopefully someone one day will make a list of items that work on DC. If the device has a built in bridge rectifier then it should work. If it's just a resistance element like a coil heater it should work fine too, but it depends on if it has a forced air fan that requires AC.
You should safely be able to get 4000 watts from any 2013 and up bike and all you need is 1500 on a nema 5-15 plug anyway.
Safest way is to research a company like Xantrex or another off grid inverter company and tell them your battery bank is 100 volts DC. I'm sure they have a solution. Tap into the pos and neg on the Sevcon and with the bike on, you can power as much as your inverter can handle.
Warning: The bike will time out after an hour. Flip the run kill switch to the kill position, make sure the kickstand is down, and then, hold the throttle open with a plastic bag between the handgrip and the kill switch plastic. This fools the bike and keeps it from shutting down after 3600 seconds.
Try the 200 watt inverter solution first. You'll find at night when you're sleeping, you don't really need a lot of power anyway. Oh and a bonus if you go that route. The 2015 and up bikes have a 500 watt DC/DC converter now. So that means you could charge 100 cell phones overnight if you wanted. Build a kill switch for the headlight, and lock the throttle to keep it powering all night. You will need to tap the DC/DC converter directly if you want to pull more than 120 watts as the accessory port has only a 10 amp fuse.
All of this will void your warranty however, except running a 100 watt cigarette plug inverter to power an LED lamp, phone charger and laptop charger, and your internet wireless router, which at night is all you should need anyway.