generators
Submitted: Wednesday, May 28, 2008 at 23:01
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Member - Brenton W (SA)
How fast can i charge a 100 amp deep cycle batterie with a yamaha 1000 inverter with a 8 amp charging point on it
Reply By: Member - Olcoolone (S.A) - Wednesday, May 28, 2008 at 23:15
Wednesday, May 28, 2008 at 23:15
I would say 12 plus hours......Maybe!
Make sure the output is for battery charging, we use Honda EU20i's for work and the 12 volt output cannot be used to charge batterys.
Might want to have a look at a good quality switch mode 20 amp battery charger.
We use Ctek's but I think Jaycar and a couple others do a similar one.
Even with a good 20 amp battery charger it still may take you 8 hours to charge a 100 amp battery from near flat.
AnswerID:
306410
Follow Up By: Member - Brenton W (SA) - Wednesday, May 28, 2008 at 23:47
Wednesday, May 28, 2008 at 23:47
I have a charger similar to the ctek but it doesnt keep up with the power draw of the battery when both fridges are working, thanks for your advice.
FollowupID:
572405
Reply By: Grungle - Thursday, May 29, 2008 at 07:46
Thursday, May 29, 2008 at 07:46
Hi Brenton,
What brand and model battery is it? With this info you can find out the manufacturers recommended charge rate (ie C5, C10, C20 etc where charge rate = capacity divided by the number after it).
The 12V outlet on all generators is absolutely crap. You will only get something like 12.4V to 12.8V out of it which is not a good enough supply to charge a battery. Ideally a 3 stage charger sized to the capacity of your battery/bank is the best thing. What size Ctek do you have? If it is between 5A to 10A then I would say it is ideal for your 100AHr battery.
As other have said it is definately not recommended trying to charge the battery with too higher current too fast as it will ruin the battery over a short period of time. The best thing is to charge more regularly with a lower current to preserve life.
My 2c
Regards
David
AnswerID:
306425
Reply By: Member - John M (QLD) - Thursday, May 29, 2008 at 17:11
Thursday, May 29, 2008 at 17:11
Brendon
8 amps per hour on charge
100 amp battery
12.5 hrs constant charge
suggestion.... get yourself a generator for charging rather than an inverter. i have a 250 amp hour battery and a 2000watt generator it charges at 25amps an hour but i usually charge the battery off 240 at
home the night before we go then when fully charged i can get 4 days before the genni gets used.
hope this helps enjoy the trip
john
AnswerID:
306552
Follow Up By: Member - Brenton W (SA) - Thursday, May 29, 2008 at 18:51
Thursday, May 29, 2008 at 18:51
Thanks
John, should have done some more research, but my partner loves the genset it runs her hair dryer
well.
Many say that fast charging a deep cycle battery will shorten the life of it, what the h$%#l is the answer, seems the fridges draw down power faster than it can be replaced, i also have a down under 73 ltr fridge that has trouble with power as
well, as soon as the battery drops in power the sensor cuts the compressor off
FollowupID:
572505
Follow Up By: bob&loz - Thursday, May 29, 2008 at 21:48
Thursday, May 29, 2008 at 21:48
Brenton
If your charger has trouble keeping up why dont you plug the fridges direct to the 240 and than the charger is putting all its amps into the battery.
thats how we alway do it
Bob
FollowupID:
572564
Reply By: Muddy doe (SA) - Thursday, May 29, 2008 at 23:19
Thursday, May 29, 2008 at 23:19
We have a 115AH Trojan wet cell deep cycle under the hood of the Prado. It runs a 40 litre weaco fridge.
We have a Honda EU10 and a Ctek 15amp charger.
When camped more than a single day I put the generator on about 10am and run it till about 4pm with the Ctek hooked directly on the battery. Ctek usually kicks over to float after about 5-6 hours of charging and we are good to go until the next morning and repeat the cycle. Charge time can also be lessened a bit by running the fridge off the generator on 240v while it is running.
Battery is now 4 years old and has done quite a few cycles so I am making allowances for it. When new it would go 36-48 hours in average 20 degree weather. Now getting 24-30 hours before it gets down to about 12 volts and needs the Honda and Ctek combo.
Just our experience.
Muddy
AnswerID:
306657
Follow Up By: Muddy doe (SA) - Thursday, May 29, 2008 at 23:28
Thursday, May 29, 2008 at 23:28
I should add that if it is not too hot then we can get away with two days between charges but camped up on the river in march when it was 40+ degrees every day it was definately a case of 8-10 hours a day of charge to keep the power up!
Cheers
Muddy
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572595