Hi All,<br /><br />I want to use AGM batteries in my van for "house" power. Do I also need to change out the starting battery to an AGM? I've read that mixing battery types is a no-no, but haven't found out if using the two types in different circuits can cause problems. I will be charging from the altenator through a voltage sensing relay if that's important. I'm guessing it is because when the engine is running both batteries will by hooked together.<br /><br />Thanks, Guy