After our Schaudt charger broke on our recent holiday when the campsite wardens removed our ehu without asking us I decided to protect the electrics with a voltage protecter. The Schaudt OVP 01 seemed a bit expensive but I found the Sollatek AVS30 at £30.40 on Amazon, easy to wire in and works great.
Amazon product ASIN B00PU7VP8Y
Amazon product ASIN B00PU7VP8Y