If it's the durite I think then nothing. As it goes both ways anyway. Sent from my Nexus 6 using Tapatalk
I just want to do one last test tomorrow to check that the multimeter is telling the truth! There are two (hopefully) scenarios re drain. My cigarette lighter (runs off SB) was playing up. The connections were loose. I have changed it now though. But wondering if that caused a drain. Unlikely?! The sink pump is wired up but not working. Wonder if somehow that's putting a drain on LB. Unlikely?! Or it's aliens.
If nothing was plugged into cigarette lighter there is nothing to pull current to cause a drain so not that. If the VSR is playing up the LB could have drained the SB through the VSR. Leave LB disconnected and SB connected and see what the voltage is in the morning. Oh and disconnect the VSR. This at least proves your SB is ok. Sent from my Nexus 6 using Tapatalk
I must say, I've only had this problem since fitting the VSR..... I've emailed Durite to get some advice on it.
The Durite VSR will draw a tiny amount of power from somewhere to operate. Not enough to flatten batteries faster than they self-discharge. What you may simply have is batteries that have been abused and have no capacity left. Especially if you left them flat. Then they sulphate up and show good or high charging and charged voltages but have a tiny fraction of their new capacity. So they self-discharge in hours back to completely flat. Making the measurement of voltage a bit of a waste of time. The current drain measurements will prove that - measure current flowing through each negative battery connection in turn : disconnect negative, connect test meter on 10 amp range from battery negative to ground . Should be much less than 0.1 amps (equivalent to killing battery in a month or so... ) When I killed my 'good' leisure battery recently , I drew about 100 watts from it for several hours then did not charge it up immediately but left it a couple of days. It would not charge again. The charger shut off normally, the voltage was good but immediately I turned on the inverter the battery voltage dropped to 11 volts and the alarm came on on the inverter.
All that will add is another fuse effectively making it 15 amps I think Sent from my Nexus 6 using Tapatalk
Have you checked the internal fuse on the meter? I was trying the same thing the other week and kept getting a 0 reading despite knowing a draw was on the battery. Turned out the fuse had blown Sent from my Nexus 6P using Tapatalk
On my meter the fuse was only on the 10a test circuit (hence the different plug socket) everything else worked fine with the meter Sent from my Nexus 6P using Tapatalk
Here's a question I've posed to Durite, but what do people think? When I first fitted the Durite, the light came on to indicate it was splitting charge. But when engine was off the light stayed on. I could force it off by turning on the headlights. As you can appreciate, i didn't do this every time. So would the relay stay open? This when the SB/LB drops, the other battery tops it up? Will see what Durite say.
It could feasibly stick closed which would simply create one big battery. You'd still need a drain of some description to flatten said battery unless one was toasted as previously discussed. Turning on the headlamps dropped the SB voltage below the relay threshold so it opened the contacts in order to protect the LB. In this sense it was working correctly. Nothing to say it hasn't failed since though. I found an old picture of your set up on another thread & I think you have the 33 relay (12v) fitted. Check the connections but I reckon you'll find them OK. Run the bus without the lights on, then turn on a load. You should hear the relay 'thunk' as the contacts open & voltage drops.
Thank you you are a genius I owe you a drink, you've just solved the problem as to why my leisure battery keeps going flat, it's the TRACKER
Swapped fuses (there are two) in the multimeter. There is no way to tell if they are blown... :/ Still getting zero amps on the SB. Gonna test LB tomorrow when I hook it up when it's stopped raining!
put the meter on continuity with the fuse out, touch the leads together (beep) says that meter works on continuity with the fuse removed. Touch one meter probe to each end of the fuse (beep) fuse good (no beep) fuse f...not so good.
Did you check the values on the fuses? Mine has a 10a for the large current circuit and a smaller (1a maybe) for the small current circuit. You might have swapped large for small which would probably blow straight away Sent from my Nexus 6P using Tapatalk
