Control panel battery drain

[Pablo19]

I have only owned my current MH since Feb so not been through a winter yet. In recent weeks I had noticed that the battery voltage as displayed on the control panel or through my solar controller was dropping by roughly .1v every day. On a sunny day it would probably just about hold the charge with the 115W Victron solar and an MPPT controller. The only way to turn off the control panel on our Knaus is to switch power off completely with the kill switch so I thought I would see what difference that made to the battery discharging. Happily, all is good now and and it seems to be holding at very close to 13v.

Does this seem about right for having a control panel left on? Although having said that, I guess the Truma iNet box would also using a small amount of power? Or could it be something else draining as well that I haven't discovered but the kill switch has stopped? For info, the batteries(2xExide gels 85ah in parallel) never went below 12.4v, I never let them go further than that before charging on EHU.

Thanks

 

[Guigsy]

Mine has a vicious energy drain. With a 100Ah lead acid battery, it'd be dead within 2 weeks over the winter. Solar was giving pretty much nothing. I've put lithium in there. It still drains, but at least it'll last much longer before it needs charging, and it the BMS will (hopefully) shut everything down before it gets damaged.

 

[Pablo19]

When you say vicious. how much per day do you think? Is that with just a control panel on?

 

[Guigsy]

My van is a bit odd. It's got a weird electrical system which means there's modules to control the pump, watch tank levels, control the lights, interface with the fridge and heating... Even when it's "off", it still eats 200mA. Which doesn't sound like much, but it'll wipe out the included battery within 2 weeks.