Over the course of the last few weeks, I’ve been planning to upgrade the electrics of Bonnie Lady narrowboat. One of the first jobs has been to add to the battery bank Battery Bank Is a collection of batteries which feed the boat and all the appliances on it. Currently, we have 2 AGM 120ah leisure batteries in the bank. (There’s a starter battery, since none of the appliances run off this, I’ve not included it. It starts the engine….