Park, you have wonderful hacks on your Hymer! I appreciate your ingenuity and your extensive knowledge of all things electrical! I have watched all your videos and I try to absorb all your thoughtful knowledge about the electrical system. If I may ask you a question, my Hymer seems to have a parasitic draw on the engine battery. If I allow it to sit too long (a few weeks) I have a totally drained battery. To the point of having to replace the battery as it will not accept a trickle charge. Is there anything common to a Hymer that I can trouble shoot? I do not have your knowledge about volts, etc. Are the slide out steps the problem? Any advice would be greatly appreciated! Thank you and thanks for posting all your videos.
The Ram Promaster chassis has roughly a 0.1A parasitic draw on the starting battery by design. The current draw is required to power the onboard computer and communicate with the key fob. Opening a door will activate the power step to make matter worse. Sitting two to three weeks will drain the battery depending of its age. There are four ways to overcome this problem: (1) drive or idle your Hymer every two weeks, (2) disconnect (quick) the negative terminal of the starting battery during storage, (3) maintain the starting battery by a trickle charger hooked up to an AC outlet, or (4) install a ~$100 Trik-L-Start device between the starting battery and the kicker AGM battery permanently if the kicker is hooked up to the solar panel and getting partial sunlight where the Hymer is parked.
@@parkhopper3627 The ProMaster manual only rates the battery for 3 weeks. As Lam pointed out, an older battery or Hymer devices will reduce that. There is a fifth way. Build Lam's brilliant trickle charger that uses the extra solar controller output.
Park, you have wonderful hacks on your Hymer! I appreciate your ingenuity and your extensive knowledge of all things electrical! I have watched all your videos and I try to absorb all your thoughtful knowledge about the electrical system. If I may ask you a question, my Hymer seems to have a parasitic draw on the engine battery. If I allow it to sit too long (a few weeks) I have a totally drained battery. To the point of having to replace the battery as it will not accept a trickle charge. Is there anything common to a Hymer that I can trouble shoot? I do not have your knowledge about volts, etc. Are the slide out steps the problem? Any advice would be greatly appreciated! Thank you and thanks for posting all your videos.
The Ram Promaster chassis has roughly a 0.1A parasitic draw on the starting battery by design. The current draw is required to power the onboard computer and communicate with the key fob. Opening a door will activate the power step to make matter worse. Sitting two to three weeks will drain the battery depending of its age. There are four ways to overcome this problem: (1) drive or idle your Hymer every two weeks, (2) disconnect (quick) the negative terminal of the starting battery during storage, (3) maintain the starting battery by a trickle charger hooked up to an AC outlet, or (4) install a ~$100 Trik-L-Start device between the starting battery and the kicker AGM battery permanently if the kicker is hooked up to the solar panel and getting partial sunlight where the Hymer is parked.
@@parkhopper3627 The ProMaster manual only rates the battery for 3 weeks. As Lam pointed out, an older battery or Hymer devices will reduce that.
There is a fifth way. Build Lam's brilliant trickle charger that uses the extra solar controller output.
@@parkhopper3627 Thank you for your response Park, it is very appreciated.
Thank you too Larry!