Re: Adding an Electric Water Heater to already built SMB
Keep in mind any electric heating unit you will need to use on shore power. A standard van electrical setup simply won't accommodate that kind of draw effectively (IMHO).
Now, if you are talking about using it while plugged in an instant-heat water heater will work dandy. It doesn't necessarily need to be RV specific - you may find something for under a kitchen sink that would suffice just fine, provided you have adequate wiring to support it.
2009 Express AWD, CCV Top & 50-ish home build. Daily driver/camper/kid hauler