Runtime depends on battery capacity and the load, but a realistic estimate also needs inverter losses, reserve capacity, battery condition and the behavior of the connected equipment.
Solar sizing should begin with daily energy use and then work backward through system losses, solar resource and the battery requirement. A simple watts-only calculation can oversize or undersize the system.
Tell us what you are trying to build, what problem you are solving and where the digital part becomes difficult. Martzine is built around that gap. Start with the outcome and the constraint, then work back to the right digital layer.
