We have an autosleeper pollensa and the leisure battery is in the engine compartment. Our current battery is only 85ah and we will be wild camping in coming months and through the winter, using an electric heater on a thermostat overnight. Therefore I believe we will need another battery, but I'm not sure where it would go, as I know it's best to keep them close together. Also I'm confused how to connect an inverter, as I know this should be as close to the battery as possible, so again this being in th engine bay causes a problem as far as I can see. I am aware that I may need to change the current battery once our exact requirements are worked out, but I'm not sure if I can fit another battery or have to go for one large one. We will get a generator to enable us to top up batteries as and when required, again dependant on how long we stay in one location without EHU.