Battery Charger

The bigger 3 Stage the better, something like this: CTek Charger

Geoff

just run the fridge on 240v

What size battery have you got ??

General rule of thumb......charger is 20% max of batt A/H...

100A/H batt......20A charger
200A/H batt....40A charger


I have 210A/H batts in the CT and use a 10A Xantrex charger.....but only charge at home , so time isn't a problem......but if I wanted to do the same as you, then a 30 or 40A charger would go in....

Good morning all
Rule of thumb is 10 % of battery capacity 10 Amp to a 100 A/h battery. Using a Honda EU 1.0 an ideal charger would be a CTEK 15 Amp and your power problem to charge will be shorter and officiant.

What size and chemistry is the battery ?

Regards

Derek from ABR

HI
" have purchased a honda eu10i generator to charge the battery on the camper trailer and have been told I should charge it through a battery charger instead of directly off the genny.
"
That is correct the 12v output from the genny is just that 12v .
iIt is not sufficient to charge a battery. What size charger depends on size of battery ..Repeated fast charging of a battery can seriously shorten it's life.The ideal size for long life is to recharge @ the 20hr rate.But that means it takes that to recharge from flat, but since again for long life a wet lead acid bat should not be discharged below 50% capacity , you would be talking about 10hrs to recharge. A 100amp hr bat with a 5amp charger would do this, but is not practical when running from a genny. A 10HR CHARGE RATE IS STILL VERY ACCEPTABLE, SO DEPENDING ON YOUR BATTERY SIZE YOU COULD USE THAT BASIS.
Any faster rrate will affect bat life , so it depends on what you want to sacrifice.
ALLTHIS DEPENDS ON HOW FAR YOU DISCHARGE THE BAT, when you say 1.5 days , to what state of discharge??, it may be better to get more battery capacity, so you can safely use a bigger charger for a shorter time & not affect bat life.
One other point while recharging the battery turn your fridge up to max cooling, JUST WATCH IT DOESN'T OVER FREEZE THE LETTUCE ETC.this makes the process more efficient , & means the demand from the battery will be reduced some what once the genny is off, DON'T FORGET TO TURN FRIDGE BACK TO NORMAL SETTINGOR YOU WILL HAVE A FLAT BAT VERY QUICK.
Consider all this & then come back if you need more help.