We have a 2019 R-29 CB and it's on a lift, at a pier on shore power (generally). Sometimes we'll get down to the boat and the batteries will be low, even though it's exposed in the sun and (generally) on shore power, unless the power goes out and a reset is required. Any ideas why the house batteries are being run low in this circumstance? There isn't much static electrical load, generally just the main fridge and whatever draw from the bilge pumps running. Thank you!