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Tvan Tvan / Re: Battery use when in storage
« Last post by Gumb on Today at 02:33:11 PM »
Something is draining it or the battery is faulty maybe ? It should only drop slightly over a month. I've got 2 AGM batteries in the Firetail (2 years old) and run the 240 charger about once a month but they really could sit there for several months and not lose too much power. As an example, I came back from a trip last Wednesday morning and the batteries are still over 98% today.

One thing is for sure, 3 days and down to 70% isn't right. I only get that low after 3 days camping with a fridge running.  Are you sure your fridge is turned off ? If it's plugged in, it will still run even with all the switches on your control panel turned off ands is designed that way so you don't accidentally shut the fridge down when camping.
Electrical and Wiring / Re: Replacing Projecta charger
« Last post by cannond on Today at 08:43:27 AM »
Thanks Frank, thanks Rob.
Destinations / Re: Query: Great Central Road
« Last post by William_Foster on April 21, 2019, 10:40:21 PM »
Just if anyone is travelling this way, the road was in really good condition on the WA and NT sides.  I was impressed (although a little sad) to see that on the NT side all the creek/river crossings are all now concrete with bitumen either side.  We sat at around 80kmph for the journey, with our tyre pressures at 30psi and it was easy. 
Tvan Tvan / Re: Peukert Exponent Value for Victron BMS 700
« Last post by William_Foster on April 21, 2019, 10:36:49 PM »
Nev, the Peukert Exponent Value is a battery value so you need to contact Fullriver and ask them for your model.  I also have Fullriver batteries and when I asked they came back with 1.20.
Tvan Tvan / Re: Peukert Exponent Value for Victron BMS 700
« Last post by Shmang on April 21, 2019, 07:35:20 PM »
Hi Nev,

I actually changed ours the other day, but I didn't think to look for a calculator and just used the battery discharge curves from the data sheets.

I came up with 1.19, I think it is still off by a little but haven't had a chance to really check.
I would go with 1.17 and see how it goes.


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Tvan Tvan / Re: Peukert Exponent Value for Victron BMS 700
« Last post by Nev on April 21, 2019, 06:51:20 PM »
Hi All
Just downloaded from the Victron website the Peukert Calculator and put in the values of the Battery.
It saying the Peukert Exponent is 1.17 Anyone else using this value?
Tvan Tvan / Peukert Exponent Value for Victron BMS 700
« Last post by Nev on April 21, 2019, 06:22:33 PM »
Hi all
I’m running two Fullriver 105 amp hour battery’s in my Tvan.
Would like to know the Peukert Exponent value of the battery’s so I can put the correct value into the Victron BMS 700. I’am using the VictronConnect app on my IPad with Victron BMS 700
All so what are all the settings you are running  on the BMS 700
Tvan Tvan / Battery use when in storage
« Last post by Faraway on April 21, 2019, 05:45:29 PM »
Unlike many of you, we are at home over Easter avoiding the crowds.
So Faraway has been sitting in the carport (not unloved as we have been making a few things for it!
A question about battery powering down when not using the van.  We have nothing turned on but the battery has gone down more than we would have thought it should.  We only have the one AGM battery, a Mk5 van. In 3 days the power has gone down to 70%, which seems a lot given the only use would be those annoying little lights on the panel. 
Topaz Topaz / Re: Battery Power Problems
« Last post by Nomadic on April 21, 2019, 02:15:45 PM »
I run two MPPT charge controllers into one battery bank and don’t notice anything abnormal with the way it charges. I view the history on Victron app and can see the max and min voltages along with time spent on bulk and float(power supply mode). I normally only run one controller so i can better monitor real solar data and not have it invalidated by Enerdrive DC2DC power source from vehicle but it doesn’t change the charge profile for the battery.
I’m running LiFePo4 which is a different profile to AGM in that it doesn’t have the absorption phase but a good quality controller should still manage it. If you are cooking batteries then I would lower charge voltages (assuming it’s adjustable) on your controller.
Topaz Topaz / Re: Battery Power Problems
« Last post by Harry Lissimore on April 19, 2019, 04:56:10 PM »
Thanks Andrew. During the day when camping, the Redarc 240v charger charges the battery and the Solar mppt charger is also charging. I don’t know how to turn that off. It’s always on when the sun is shining! Both chargers are built in. If that were a problem everyone would have the same problem. My current batteries are now 8 months old. The previous ones were failing at 12 months. When I get home in 2 weeks I’ll check out the battery capacity again.

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