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Subject Topic: Battery monitor question
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Person240duo
11/4/2016 at 5:22pm
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The battery is still chargeing , space for batteries on my autotrail is at the back and very limited for battery size, I can only get batteries that are 225mm high (including terminal) in the space ,that's the reason for going for 1 largeish and not connecting to smaller ones together,

The battery shop down the road can only get the

http://www.batterymegastore.co.uk/products-by-manufacturer/varta/varta-k7.html

What do you think of this one , the information on the varta site is very good

http://www.varta-automotive.com/en-gb/products/commercial-vehicles/promotive-silver/

Cheers
Chris


PersonFox Molder
11/4/2016 at 6:23pm
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Be aware of "gimmicks" and tech talk, a battery is a battery. Stick to:
http://www.batterymegastore.co.uk/products-by-manufacturer/varta/varta-k7.html


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Person240duo
12/4/2016 at 3:19pm
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took the battery of charge this morning , been on the charger since 12.45pm Sunday dinner time.

i put back on the motorhome as i had nothing at home that i could use to apply a load ,

battery 13.21 of the charger left to stand for 3 hours then applied load as soon as load was applied voltage was 12.78v

3.5amp for 1 hour 12.51v after 30mins no load 12.78v

3.5amp for 1 hour 12.46v after 30mins no load 12.71v

3.5amp for 1 hour 12.42v after 30mins no load 12.66v

1 hour later no load 12.68v

this seams better than my test applying a constant load for 5 hours

cheers
chris

Post last edited on 12/04/2016 15:25:34

Post last edited on 12/04/2016 15:27:00


PersonFox Molder
12/4/2016 at 7:25pm
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Chris, I would say the battery is in need of replacement as the voltage drop is bad for a low load of 3amps. At least you now know better. Will await your next message when you have fitted the new battery.


Person240duo
13/4/2016 at 6:52am
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Cheers, I have ordered a new battery from the megastore and should be here today , I will stick the charger on it then put on the van , and then update again ,
Thanks for your help

Post last edited on 13/04/2016 06:58:45
Spelling correction from predictive text

Post last edited on 13/04/2016 07:00:17


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PersonFox Molder
15/4/2016 at 5:16pm
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Sitting here at the Peterborough show and wondered how your new battery is holding up. We have heating on, TV and Sat system on as well as fridge and hot water and so far since 2pm yesterday drawn 47amps and batteries still reading 12.67volts with only 1amp per hour from the sun behind the clouds.


Person240duo
15/4/2016 at 7:00pm
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Hi
Not had a chance to check it yet, I bought the varta Ltd 180, all being well I will test in the morning, enjoy Peterborough show

Cheers
Chris


Person240duo
17/4/2016 at 8:47am
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Hi
Just retested and all seams OK ,

Start voltage 13.20

1 hour 3.5amp load voltage 12.50v
30 minutes rest voltage 12.80v

1 hour 3.5amp load voltage 12.46v
30 minutes rest voltage 12.75

1 hour 3.5amp load voltage 12.44v
30 minutes rest voltage 12.71

Voltage finally settled at 12.73v after 8 hours ,now back on the solar charge and 3amp been put in , no more testing just getting the van ready for the trip to Scotland 10 days time,

How was Peterborough, very muddy

Cheers
Chris

My old Nass BM1 battery monitor is for sale in the classifieds


PersonFox Molder
17/4/2016 at 9:51am
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Chris, looks like your sorted now and I'm pleased for you. Just make sure that your battery is on charge when not in use as that will keep it in good condition as all batteries need to be float charged (13.8volts) when not in use (this can be done with solar panel) Remember that when you are down to 12.2volts the battery needs a good charge on EHU as solar will not charge it at 14.4volts.
Peterborough is cold wet, but today sun is out, however we won't be attending again as watch folk being towed off field this morning.
Enjoy your trip out. Kindest regards John


Person240duo
17/4/2016 at 10:03am
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Thanks John for your help and information

I have a victron 75/15 MPPT regulator which seams to be the bee's knees, I also have the Bluetooth dongle connected to the regulator and bmv700 and the app on the tablet and phone to view all that's happening with the solar and battery

Cheers
Chris


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PersonFox Molder
17/4/2016 at 10:05am
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Chris, I have the same MPPT regulator, so you have a great setup. Now you can relax and enjoy it all.



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