If you mean using it as a "stranded recharge" device, you can use it to power an inverter to run a level 1 charger (or level 2, but you'd need a whopping big inverter). If you mean using it supplementally while underway, the problem is that the Leaf VCM and LBC software won't connect the charge port or circuitry under those circumstances. So you'd need to somehow wire around the charge relays, then use an inverter and charger interfaced directly to the LBC on the far side of the relays. The LBC would still need to be tinkered to know the power was there and do charge control. I suppose it might be doable, but not straightforwardly.