chargers!!!

[Poppy]

Am I right in my understanding?

Done a little reading with regards to the correct charger to get. On a whole they say...anything above 150Ah to get a 20amp charger & below, a 10amp will be fine.
So, if I'm getting 2 x 110Ah & joining them, thus making 220Ah then I should get a 20amp charger & not look at them as individuals, as then I'd only need a 10amp.
Is this correct or have I lost the plot (again)?

 

[shortcircuit]

If you are not connecting the batteries together ie +ve to +ve and -ve to -ve, then you would charge each battery individually and the 10 amp would suffice. Normal convention is to connect as suggested, in which case the 20 amp would be better

 

[Bigpeetee]

How much time do you anticipate being on a site.

Where you live, could you run a cable to the MH to charge at home??

If neither, then a charger is down the list of priorities.

Better to ensure that you have a good charging system from your alternator, a heavy duty split charge using 100A cable is a good start, that way you can quickly charge from the engine.

Secondly, a solar panel to give a gentle top up whilst the sun shines

Then and only then, if you find you are running out of power get a battery to battery charger to realy boost the charge from your alternator, you'll use the same 100A cable you previously installed, so won't waste much (1 relay)

I've used my mains charger less than half a dozen times in the past three years, 4 of those was because we were on a site where you HAD to have EHU!!!

If you find you really do need one, just retrofit, it's only mains in 12v out and a couple of screws on the wall.

But I think the DC power you have will be more than enough!!

Anyway, you're keeping the weight down by not having a charger.

Connect your batts as a single unit.

PS, a smaller charger just takes longer. Mine claims it's 15A, but as it's in the wardrobe and the cables from it meander all over the place before it gets to the battery, I'm lucky to get a 4A charge from it (voltage drop over thoroughly inadequate cabling for wilding purposes)

 

[Poppy]

How much time do you anticipate being on a site.

Where you live, could you run a cable to the MH to charge at home??

If neither, then a charger is down the list of priorities.

Better to ensure that you have a good charging system from your alternator, a heavy duty split charge using 100A cable is a good start, that way you can quickly charge from the engine.

Secondly, a solar panel to give a gentle top up whilst the sun shines

Then and only then, if you find you are running out of power get a battery to battery charger to realy boost the charge from your alternator, you'll use the same 100A cable you previously installed, so won't waste much (1 relay)

I've used my mains charger less than half a dozen times in the past three years, 4 of those was because we were on a site where you HAD to have EHU!!!

If you find you really do need one, just retrofit, it's only mains in 12v out and a couple of screws on the wall.

But I think the DC power you have will be more than enough!!

Anyway, you're keeping the weight down by not having a charger.

Connect your batts as a single unit.

PS, a smaller charger just takes longer. Mine claims it's 15A, but as it's in the wardrobe and the cables from it meander all over the place before it gets to the battery, I'm lucky to get a 4A charge from it (voltage drop over thoroughly inadequate cabling for wilding purposes)

Pete, why o why do you have to live so far away from London!! Could really do with dropping The Duck off to you & picking it up again with all the electrics in place

 

[Tony Lee]

20 amp would be good as it lets you get a full charge into a seriously-depleted 220Ah battery overnight. If money is tight then just get a 10 amp model as it will do the job but just take longer..
Assuming your rig doesn't have any form of mains charging installed, regardless of how much other charging you have from solar or by driving (which rarely looks after the batteries anyway because they rarely get fully charged), there will always be the time that you can't drive and the sun doesn't shine and you are on EHU and don't want to be worried about using power. VERY few rigs have no on-board mains charging available. If nothing else, it is just a form of insurance and would allow you to continue a holiday if other forms of charging failed.