Power Drain

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Well, when i winched my mates 90 up around 100ft I didnt really have a problem, I just took my time to prevent overheating/damaging the winch. When winching the polo up it was less distance, weight and angle. The lights dipped whilst winching then progressivly got worse. I frequently stopped to give the winch a break and time to put a bit of charge in the battery then when I started again it was fine for around a minute or so then it would die again until it eventually drained all battery power and wouldnt restart.
 
Assuming the motor is about 4.2Kw (average for a 12000lb winch) then it'll be drawing 350Amps. If your only putting 45amps back in to it isn't going to take long to flatten the battery.
 
o sorry just read OP u got a doozel i can understand the winch power loss but why the engine cut out is a mystery to me. diesel engines can run without a battery once started...
 
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So basically after winching on the sunday, I hadnt put enough charge back in before using the winch again? Even with the engine running.
 
So will the Varta Battery ive just got be sufficient with a banner on a split charge system? With no need for a higher amp alternator.
 
I will have to get one of those OEM LR waterbottles for the battery then! Seriously though no need for the alternator, just split charge and second battery then?
 
nah you will have exactly same problem but you wont need a jump start because the winch wont dry ur starter battery. new alternator i think
 
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