charging campert trailer battery from 240v

Submitted: Sunday, Jun 25, 2006 at 11:33
ThreadID: 35246 Views:3258 Replies:5 FollowUps:7
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I have 2 questions about charging my CT battery from 240v (either from home via mains or via Honda generator).

1. Could I use generator 12v DC outlet simultaneously with an 8amp charger running off 240v generator outlet?

2. If I instal solar & incorporate a 20 amp plasmatronics regulator, could I run a 20 amp bulk charger through that regulator and avoid the need to buy a 3 stage 240v charger?

Any thoughts would be helpful.
cheers,
Dave
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Reply By: RosscoH - Sunday, Jun 25, 2006 at 14:24

Sunday, Jun 25, 2006 at 14:24
Hi Ozidave,
All I have is 2 x 80watt Solar Panels through a basic 20 amp regulator and never have to go near a 240 volt charger except when the camper is parked in the shed at home, and soon I won't even need that as I am going to through one panel on the roof of the shed and run a cable inside and then it will charge on the solar even when in the shed.
Cheers RosscoH
AnswerID: 180265

Follow Up By: Raydueler - Sunday, Jun 25, 2006 at 19:43

Sunday, Jun 25, 2006 at 19:43
How many batteries do you charge? and what do they run?
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FollowupID: 436552

Reply By: Alloy c/t - Sunday, Jun 25, 2006 at 15:00

Sunday, Jun 25, 2006 at 15:00
1 = NO/YES depends on genny make , but y would u want to.
2 = NO u will make the solar panel regulator "blow" ,, and why would u want to .
AnswerID: 180266

Reply By: Member -Dodger - Sunday, Jun 25, 2006 at 15:19

Sunday, Jun 25, 2006 at 15:19
1. no just charge the batt from the genny via your 8amp charger.
I suggest that you get an auto batt charger for the CT and install permanently so that whenever you are connected to the 240 it gets charged automatically.
Have a look at
www.projecta.com.au
and go to their auto chargers.
I have had one in my vanfor 5yrs and although it is only of small charging capacity it does the job on a 100amp/hr batt ok but takes a long period of time if the batt is real low.
I also use a solar panel when staying in one place for more than a day.
Plus have an arid twin charge system that runs from the nissan aux batt.
see www.12voltshop.com.au

You will get some Ideas from these places.
I used to have a handle on life, but it broke.

Cheers Dodg.

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AnswerID: 180268

Reply By: Derek from Affordable Batteries & Radiators - Sunday, Jun 25, 2006 at 16:47

Sunday, Jun 25, 2006 at 16:47
Hi Ozidave

The DC outlet of the generator is unregulated and must be monitored to prevent overcharging. You can use it for a short while and then finish the job off with a good 3 stage charger.

Don't use a solar regulator. Most solar regs short out the panel to control charge and this would damage the regulator and possibly also the charger.

We fit our 3 stage 'Smart Charger' to all our customers campers and they will run off a generator generator. 15 amp unit is the most popular but I recommend the 25 amp unit.

Regards Derek.

AnswerID: 180274

Follow Up By: Member - Ray - Sunday, Jun 25, 2006 at 17:57

Sunday, Jun 25, 2006 at 17:57
Derek
What do you mean "dont use a solar regulator?
Every solar setup requires a regulator to control the power generated by the panel as far as I know.
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FollowupID: 436533

Follow Up By: Derek from Affordable Batteries & Radiators - Sunday, Jun 25, 2006 at 18:21

Sunday, Jun 25, 2006 at 18:21
Hi Ray

You misread my explanation.

You can't use a solar regulator on a generator or charger !

Regards Derek.
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FollowupID: 436538

Follow Up By: Member - andrew B (Kununurra) - Monday, Jun 26, 2006 at 22:52

Monday, Jun 26, 2006 at 22:52
sorry....quick post hijack...question for Derek. In a boat with twin engines/alternators, if the two batteries are hooked together for a short or long time, do the alternators get a bit confused (for want of a better word), as they would both be charging the same "big" battery at the same time?

Thanks Andrew
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FollowupID: 436773

Follow Up By: Derek from Affordable Batteries & Radiators - Monday, Jun 26, 2006 at 23:32

Monday, Jun 26, 2006 at 23:32
Alternators are not that clever, they won't know how big the battery is just how much current it is pulling and then cycle back.
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FollowupID: 436781

Follow Up By: Member - andrew B (Kununurra) - Tuesday, Jun 27, 2006 at 10:05

Tuesday, Jun 27, 2006 at 10:05
Thanks Derek, but I was more concerned with 2 alternators charging the same battery

Cheers Andrew
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FollowupID: 436816

Reply By: Member - Ray - Sunday, Jun 25, 2006 at 18:03

Sunday, Jun 25, 2006 at 18:03
Dave
I have just installed a 130w Kyocera panel and a Plasmatronics20 regulator on my CT. We have had 2 weeks at Shark Bay and it kept my 130 amphour battery on full charge the whole time. We are running a 50lt Cole fridge and a 12v
versalite for a while at night.At home I have a Projecta 3500 charge and maintain charger which I use to keep the battery topped up.
AnswerID: 180285

Follow Up By: Alloy c/t - Sunday, Jun 25, 2006 at 18:16

Sunday, Jun 25, 2006 at 18:16
HE means do Not use a Solar panel regulator INLINE with a gen set or 240v ,
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FollowupID: 436536

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