Generator to Battery charger.

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iowman

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I have a ctek battery charges which charges my house batteries at 25 amps when connected to shore power. This is 240 volt charger batteries 12 volt.

If I bought a Honda EU10i petrol generator which outputs at 240 volts 1kw. Max, 900 continuos and connected this to the ctek battery charger would my charge rate be 25amps to my batteries.

Thank you for your help with this.
 
Probably yes.
Your batteries are being charged with 300 watts (12v x 25 amps). The charger won't be 100% efficient and will draw, say, 500 watts (that is only a guesstimate).
If the generator is churning out 900 watts it will cope without a problem.

You may be able to find out exactly what the charger drawers either from the handbook or a plate.
 
The Honda generator produces "clean, smooth power" suitable for sensitive electronic equipment. According to Honda's info on line

Presumably you are talking about an MSX 25 charger ..... It takes 2.9 amps at max output. According to Ctek's info on line

2.9 amps is nearly 700 watts at 240 volts ... rather more than RM's guesstimate !


Now we need an Electrical Engineer to talk about power factors !!!!!!!!! before we can be sure it will be OK.

I expect the charger is a resistive load, not inductive, and it will be OK
 
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Crikey, 2.9amps to produce 25a at 12v that's almost unbelievably inefficient, on another current thread a forumite talks about using a 50a 3 stage charger with the same genny, I personally thought the 500w to be pessimistic, but hey, it wont be the first time i've been wrong:rolleyes:
 
davids0865 said:
Crikey, 2.9amps to produce 25a at 12v that's almost unbelievably inefficient, on another current thread a forumite talks about using a 50a 3 stage charger with the same genny, I personally thought the 500w to be pessimistic, but hey, it wont be the first time i've been wrong:rolleyes:
Click to expand...

Yep Surprised me too

Wasn't the other thread talking about using an EU20i. Hope so or he is going to be disappointed
 
I have the same genny and same charger and works fine with the immersion element on as well (750w). I think that 2.9amps is the start up current. Sterling 50amp battery charger uses 2kw current at start up!
 
Lazy Kipper said:
I have the same genny and same charger and works fine with the immersion element on as well (750w). I think that 2.9amps is the start up current. Sterling 50amp battery charger uses 2kw current at start up!
Click to expand...

The spec on the website says "Current, mains 2.9A rms (at full charging current)" q.v.
 
My 80A Sterling charger, (Combi), runs fine on a Honda. eu20i.

Logic would suggest that a Honda Eu10i should have no trouble running a 25A charger.
 
We ran a Sterling 40A charger from a Honda EX650. Sometimes the Honda would trip out at startup if the Sterling was set on an agressive charge cycle , but mostly it was fine. We however have now upgraded to the EU10i because the trip outs were becoming a pita. I don't anticipate similar issues with the EU10i through the 40A.

At 15V x 40A, assuming 100% efficiency of the charger (which it won't be) it's 15 x 40 W = 600W
 
I use a Honda EU10i with a Sterling ProCharge Ultra (20amp) which draws 350w (the largest 60amp one draws 900w) and it purrs along perfectly happily. Like someone above, I can hav also run the calorifier (500w) at the same time with no problems (the genny just ups it's effort).

So a 25amp charger will be fine on the EU10i unless it's a really pants charger.

main reason for getting the 10 as opposed to the 20 genny was the size. The 10 is easily lifted in and out of the lockers with one hand.
 
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