The Overlander As your need for power grows, so can your RV solar system by adding additional modules to your existing Solar Kits or even to the Weekender ISW and Solar Elite charging system. Each Go Power! expansion kit includes a solar module, mounting hardware and expansion connections to quickly connect to the existing solar module on your RV roof. All Go Power! Solar Expansion kits are compatible with one another - 100 watts or higher. Go Power! Expansion kits feature MC4 connectors (multi-contact) for parallel wiring between our solar kits. This interlocking system allows for a simple installation that is reliable and safe. Volt solar panel on the market and this kit is designed to quick connect to an existing solar system that already has a solar controller. If you have a system that you would like to upgrade with an extra 190 Watts of solar, this is the kit to buy. It has mounting hardware to mount the solar panel as well as MC4 interconnects to quick connect to an existing solar kit. This kit works best with the Go Power! solar kits. . This is the largest 12 Volt solar panel on the market and this kit is designed to quick connect to an existing solar system that already has a solar controller. If you have a system that you would like to upgrade with an extra 190