There’s no limit to how long your connection can be, but the longest cord available on the market is 50 feet. If you need to connect to a power source farther away, you’ll have to get an extension cord. Keep in mind that the farther you go and the more connections you make in between your RV and the power supply, the less efficient your connection will be. That doesn’t mean it won’t be secure or power your RV successfully, but it may not charge your batteries as quickly as a direct connection would.