Fridge again
Submitted: Monday, Sep 28, 2009 at 19:18
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Bricky
I know this would have been discussed before, but a quick question.
Last time we went away we ran our 40 lt trailblazer on 240v direct from our 1kva Kipor genny,(I know not the best but has done us ok), while charging the batteries through a 25 amp CTek charger.
I have since been told that you should not run a fridge direct from a generator. Is this correct?
Thanks
Daryl
Reply By: dbish - Monday, Sep 28, 2009 at 19:59
Monday, Sep 28, 2009 at 19:59
Should not be a problem at all Kipor generators are digital sine wave. I run wy waeco on240v while charging my battery using 240v charger at the same time.
Mine is a 2600Watt kipor.
AnswerID:
384983
Follow Up By: Member - 1/2A - Monday, Sep 28, 2009 at 20:04
Monday, Sep 28, 2009 at 20:04
Is that a modified sine wave or a pure sine ?
FollowupID:
652725
Follow Up By: dbish - Monday, Sep 28, 2009 at 20:32
Monday, Sep 28, 2009 at 20:32
Pure sine wave as clean as the mains have checked with an osilliscope/CRO.
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652726
Reply By: Best Off Road - Monday, Sep 28, 2009 at 21:03
Monday, Sep 28, 2009 at 21:03
Daryl,
You can happily run a fridge from a quality generator that provides clean power. Kipors deliver clean power.
I've been doing it for years with a Kipor.
Rest easy
young man. All is fine.
Cheers,
Jim.
AnswerID:
384988
Reply By: dry lake racer - Monday, Sep 28, 2009 at 21:22
Monday, Sep 28, 2009 at 21:22
No problem to run a fridge direct from a generator it is no different from the mains, the power from the generator is the same voltage & frequency as normal mains (
grid ) power, it is the same for any station owner,
shack owner, mining site, they run everthing from their generators, all generators are sine wave, three phase and are rectified to single phase ie: 240 volts ,50 hertz, (unless you have a three phase genset - 415v ). it is
inverters that are square wave, modified sine wave or sine wave or pure sine wave as some say. The only thing to worry about is the starting curent of the fridge may be a bit high for the 1kva genset, running curent would be fine, it just means that when the compressor on the fridge cuts in it may cause the genny to stall or faulter for a split second or two then it would pick up speed ok.
hope this helps
Martin
AnswerID:
384995
Follow Up By: Ray - Tuesday, Sep 29, 2009 at 10:09
Tuesday, Sep 29, 2009 at 10:09
You have started doubts in my mind regarding generators. You hear a lot about sine wave generators and I have wondered how much bull **** is involved.
I have had a Yamaha ET 650 generator for quite a few years now and at times I have run my fridges, fluo lights and TV of it with no ill effect. I usually use it for charging my batteries. I wonder if all the extra expense of a so called sine wave generator is worth it. I understand that the Engle generator is not a so called sine wave generator but Engle do not say that it cannot be used with their fridges.
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652773
Reply By: Wilk0 - Monday, Sep 28, 2009 at 21:52
Monday, Sep 28, 2009 at 21:52
Hi bricky,
I agree with all the posts, I run my engel on the honda genny 1kva and it goes
well.
Kipor is aparently a puresine wave so it should be the same. I use a 25amp ctek the fridge and some lights and it copes
well (although it is loaded up).
Cheer Wilko
AnswerID:
385003
Reply By: Maîneÿ . . .- Monday, Sep 28, 2009 at 23:40
Monday, Sep 28, 2009 at 23:40
What I can't understand is:
Why run the fridge direct from the genni ??
Why not run the fridge from the 12v battery system ??
Reason being, you will have the genni running even when the fridge is NOT running,
this is only a waste of fuel as most efficient 12v fridge's will run on a 30% duty cycle anyway.
Why not run the fridge from the battery, then only charge the battery system when it gets low ??
Maîneÿ . . .
AnswerID:
385021
Follow Up By: Travelin OZ - Tuesday, Sep 29, 2009 at 17:07
Tuesday, Sep 29, 2009 at 17:07
That sounds like false economy to me.
If you run the fridge on the battery as it is charging, every time the fridge cycles on it would loose a small amount of charge, so there for it would take longer for the battery to charge.
If you put the fridge on 240 while you charge the battery, the battery would charge quicker, and you wouldn't waste any power or fuel as the charger would run full time while charging the battery, the fridge would cycle off and on as usual, the unused power that the fridge does,t use is still powering the charger.
FollowupID:
652807
Follow Up By: Maîneÿ . . .- Tuesday, Sep 29, 2009 at 17:21
Tuesday, Sep 29, 2009 at 17:21
Maybe I should reword it?
If you *need* to charge the battery it's only because it's low in power
If you use the genni, to run a fridge, it's running even when the fridge is off
Therefore genni is running and not charging the battery because the battery is fully charged and has not been running the fridge anyway
However, if you run the fridge from the battery, fridge is running whenever it has to, the gennie then only has to be run for a much shorter time to recharge the battery (and yes it will also run the fridge too) when it gets low, as it will at the end of the day.
Maîneÿ . . .
FollowupID:
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Follow Up By: Travelin OZ - Tuesday, Sep 29, 2009 at 17:31
Tuesday, Sep 29, 2009 at 17:31
My interpretation of the post is, he is unplugging the fridge from the 12V system and plugging it into 240 ( genset) while charging the battery, then once the battery is fully charged place the fridge back on 12V.
I makes sense to me.
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652813
Reply By: Member - Rodney B- Tuesday, Sep 29, 2009 at 11:38
Tuesday, Sep 29, 2009 at 11:38
Agree with Mainey. Why run a genny just to power the fridge when you can use 12 volts then charge the battery for an hour or so each day. We use our CT this way for weeks running lights etc off the battery and then just put the smart charger on for an hour or so every second day.
Saves on fuel and noise.
We have a Honda 1kv and it will run the fridge great but why bother.
AnswerID:
385053
Reply By: ozjohn0 - Tuesday, Sep 29, 2009 at 11:38
Tuesday, Sep 29, 2009 at 11:38
The fridges 240V heating element will do a far superior job with normal fridge use.
The 12V element will only keep the fridge cold. I'e'. Don't open the door.
12V is usually only used when traveling.
ozjohn.
AnswerID:
385054
Follow Up By: Member - Rodney B- Tuesday, Sep 29, 2009 at 11:40
Tuesday, Sep 29, 2009 at 11:40
I think the trailblazer is a compressor fridge and doesn't have a heating element.
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652778
Reply By: arofs1 - Tuesday, Sep 29, 2009 at 16:42
Tuesday, Sep 29, 2009 at 16:42
There is no problem powering the fridge from the Kipor as it is a pure sine wave generator. A cheaper square wave generator will also run it OK, but there is a small chance of a spike if loads fluctuate.
I have run my last 2 fridges off a 100 amp hour battery with a solar panel but if the weather is not great I recharge the battery via the generator as needed.
240 volt or 12 volt for a compressor fridge, as the trailblazer is, makes no difference as the 240 is rectifed back to 12, as that is what the Danfos motor is anyway.
Don't under rate the Kipor, it is still a good generator, albeit not the quality of the Honda or Yamaha.
Brian DJ
AnswerID:
385074
Follow Up By: dry lake racer - Tuesday, Sep 29, 2009 at 18:08
Tuesday, Sep 29, 2009 at 18:08
I do the same as you run the fridges from the 12v battery & use a solar panel to charge the battery & on the odd time when the panels are in shade or its overcast for days on end & your not travelling the genset may come out to charge the battery direct, very rarely take the genset away i prefer the sound of the solar panels, but alot of people wont spend the money on good deep cycle batteries & big enough panels
We have 2 fridges & 1 freezer all running at the one time on the dual battery system & solar panels, not had a problem ,plus lights
Martin
FollowupID:
652818
Reply By: Bricky - Tuesday, Sep 29, 2009 at 17:43
Tuesday, Sep 29, 2009 at 17:43
Thanks for the replies everyone. I can rest easy knowing I will not damage the fridge. As Travelin OZ said I normally run the fridge on 12v and only on 240 while charging the batteries. I am assuming that the genny can handle both the fridge and charger and it means the fridge is not draining the batteries for 2 or 3 hours a day.
Daryl
AnswerID:
385082