We've gone with the 50 Amp 125V/250V cordset. They've got a great system going and we're excited to use Smartplug on Wally the Airstream. Check out the set that we're using here: https://smartplug.com/portfolio-item/50-amp-125v250v-50-cordset-stainless-steel-inlet-2/

For details on their system and why it's safer than the historical standards in the Marine and RV industry, check out their documentation here: https://smartplug.com/resources/faq/