Solar panels, while they can last for decades, can suffer from loss of efficiency when routed into your home. Instructables user MPaulHolmes has a fairly uncomplicated solution for off-grid solar systems to eliminate pulse width modulation, have bare minimum switching of the transistor, and maintain small total harmonic distortion.
The hardware requirements for this high-efficiency off-grid solar inverter are fairly simple — you will need to build a circuit that can independently control three separate H-bridges. The bill of materials for the prototype, as well as the software and schematic, are freely available should you contact the designer via email, or you can wait to purchase a newer version of the PCB that will soon be made public.
