It’s tough to say which is definitively the best RV surge protector without knowing what factors you value most highly in an RV surge protector, but the website https://www.stayontrails.com/best-rv-surge-protector lists the top 5 products based on different objective factors.
For example, if you’re looking for the best budget-friendly option, the best choice for you might be the Surge Guard 44260 Entry Level Portable Surge Protector. If you’re most concerned about how portable it is, then maybe Progressive Industries EMS-PT30X would be the best option for you.
Each product will have different pros and cons. Some may be easy to install and very responsive to electrical issues, but might not be weatherproof. It’s worth deciding what your priorities are before browsing different products so that you can make a more informed decision.