You will have to tell us more about that "electric fridge" to be sure, but the answer is probably yes. Fridge make & model would be a big help. If it is an 120v electric-only model then it requires an inverter to get power from batteries and you didn't mention having an INverter.So, just to verify, we have an electric fridge and while we are traveling the fridge will stay on all the time even if we aren’t plugged in to electricity? True?