I would recommend replacing your current battery solenoid with the newer style BIM from Precision Circuits Inc. The BIM does not guarantee 100% battery charge, but prevents harmful battery charge levels. This long-term monitoring of the batteries prevents the annoying relay clicking that exists in simpler isolation modules today. Once the batteries have charged for one hour, the BIM will isolate the batteries to prevent overcharging, and will only reconnect the batteries for charging if one of the batteries drops to approximately 80% charge, and the other is being charged. If the charging system is drastically overburdened, the batteries will be isolated, however, if the BIM sees a long-term charging of both batteries it will allow the batteries to remain connected and allow the charging system to do its job. If it senses a charging voltage, it connects the two batteries together. The BIM monitors the battery voltage of both the chassis and coach batteries over long periods of time. Here is an example of one from Precision Circuits Inc.Īccording to the Precision Circuits Inc data sheet, the BIM performs the following functions: The newer BIM switches now allow a charge from the inverter/charger to the house batteries and to the engine batteries when connected to shoreline power. This is the momentary (MOM) switch pictured here. It can provide a jump start from the house batteries to the engine batteries with a switch that is on the dash. It provides a charge from the engine alternator to the house batteries while driving. Your solenoid is the older type that isolates the engine and house batteries. Since your engine batteries are not being charged when you are plugged into shoreline power, I would assume you do not have the newer style battery isolation management (BIM) system. I would also assume you have two larger 12-volt batteries for the engine that are rated in Cold Cranking Amps (CCA). The “bay lights” that you left on for 24 hours run off the house batteries and would not drain the engine or start batteries and would be charged by the converter when plugged in. Since your rig is a larger diesel pusher, I would assume you have four 6-volt batteries for the house system and a larger 2000-watt inverter/charger that charges the batteries.
When plugged into shoreline power, your house batteries will be charged by the converter or inverter. I was surprised that it went out so soon. After a couple of hours, the red light went out on the minder or tender. Then I connected a battery minder to the two starter batteries. I boosted the batteries with the house batteries, started the engine, and then shut the engine down. I left the bay lights on for about 24 hours. Today and earlier this year the starter batteries were dead. It does not store any personal data.My RV is plugged into a 30 amp that is located in a heated garage. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics".
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