Ok, here's what I'm thinking. The solar repeater would be more of a temporary (months?) solution for people outside of the mesh's radius that want in. It would be a link that mostly works during the day and sunny ones at that. The people in the repeater chain would receive mesh internet for some period if they want a permanent solution they can contact peoplesopen and integrate with a home node. If not, we can always move the repeater chain and try a new mesh tendril.
A solar repeater would be much quicker to set up, could be done with a 2 person team, and you wouldn't need to interact with the homeowner or go inside their house. Possibly as short a setup as 30min vs 2hrs to to integrate a home node.
Nanostation Loco M2 averages 3-4W? That's great news! The panel probably needs to stay fixed at the 20W size, anything larger than that seems too expensive and cumbersome to carry and mount without additional hardware.
Definitely need remote voltage and current monitoring Valent, good call. Are we sure that MPPT is the way to go over PWM? Cost reasons number 1, but I was worried that the additional micro-controller would eat the power that was gained in increased efficiency for a low power application like this.
Jenny, I'm putting 2 of these together as a proof of concept, if the mesh wants to cover expenses I won't say no :)