We are just finishing up a no-permit, off grid, water access only cabin. It is wired for power, and so far we have a Honda eu2000 generator giving us power when we need it. At some point I'd like to do solar, but as a first step I'd like to set up a battery pack system and pure sine wave inverter that I could charge with my generator when required - so that I wouldn't have to run the generator each time we have simple tasks that require power. I'd also like the system to be as maintenance free as possible, and OK to leave in place in very cold winters (when it would not be used). Is this doable? What equipment would I need to make this work, and what should I budget in terms of cost? Thanks in advance for the help.