This is a detailed walk-through of the planning and installation of our 3kW - 5kWH - 120V off-grid solar system that powers a rehabbed shipping container. more. Design and installation of Solar PV Systems Today our modern world needs energy for various day to day applications such as industrial manufacturing, heating, transport, agricultural, lightning applications, etc. Most of our energy need is usually satisfied by non-renewable sources of energy such. Whether you're preparing for a more sustainable lifestyle, reducing your reliance on the grid, or just powering a cabin or van, building your own solar system can be incredibly rewarding. The key steps involve planning, mounting hardware, electrical work, and final activation. You'll choose from three main system types: grid-tied (connected to the utility).