Investigate something like a Victron Multiplus (I use a small 500VA one for the fridge and some DC outlets) paired to a LiFePO4 1400ah battery from Blue Nova for a true pure sine power supply with UPS like automatic recharging. This will outlast most shed cycles.
Yip, that's about right. I waited I think exactly 3 weeks. During this time nobody will contact you. You must follow up yourself. After week one, I was told that I can't expect much movement before week two. After week two I was told that OpenServe had "failed my location". Their words. On week...