Bunnings Generator

Submitted: Sunday, Jul 31, 2005 at 09:38
ThreadID: 25211 Views:5979 Replies:8 FollowUps:7
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Hi Is the 240v power from a Bunnings Generator pure enough to run a three stage battery charger or can it cause damage to the Electronics
Greg
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Reply By: Member - John Q (QLD) - Sunday, Jul 31, 2005 at 09:57

Sunday, Jul 31, 2005 at 09:57
Hi Greg,
From personal experience - NO,,,,,,blew a fuse in mine & hate to think whay other damage it might have caused.

John
AnswerID: 122972

Reply By: Blackie - Sunday, Jul 31, 2005 at 10:25

Sunday, Jul 31, 2005 at 10:25
My knowledge in this field is less than zero but I wonder if a power fliter or surge protector between the genny and the charger or any appliance for that matter would provide the protection required.
AnswerID: 122976

Reply By: herkman - Sunday, Jul 31, 2005 at 10:27

Sunday, Jul 31, 2005 at 10:27
No my friend it is not.

You would be better if you wanted to charge cheaply, is to buy a dual battery converter and charge from the car when you are going along.

That is what we do, and it works well.

It would be a good idea to also put a low voltage switch on the battery, so you do not completely discharge the battery.

Regards

Col Tigwell
AnswerID: 122977

Follow Up By: Nudenut - Sunday, Jul 31, 2005 at 16:51

Sunday, Jul 31, 2005 at 16:51
ooops
hey since when was you able to type in shiet and post but it comes back as a bleep?
but i'm glad it did
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FollowupID: 378127

Reply By: Alloy c/t - Sunday, Jul 31, 2005 at 15:56

Sunday, Jul 31, 2005 at 15:56
Plainly and simply the 3 replys above are telling you bullsh-t ,, the $98 bunnings generator will run what ever you want it to , keeping in mind that the gen set has a finite output , if your 3 stage batt charger DRAWS more than the gen set can supply you wont charge the batt to its full potential ,, I have a 950 scorpion gen , max output SUPPOSEDLY 950watts ,,will run a 2500 watt oil filled heater and fan + 2x fluro lights ,,, mates suposedly 750 watt gmc $98 bunnings gen will run an 80lt waeco+ 15lt engle +60lt engle +2x 40lt chescolds +a 60lt chescold freezer ,, 4lt 2stroke fuel 9 hrs ..... go figure ,,, $98 bloody bargain ,buy 10 for less price than 1 honda/yamaha ect.
AnswerID: 122999

Follow Up By: Nudenut - Sunday, Jul 31, 2005 at 16:47

Sunday, Jul 31, 2005 at 16:47
of course it will run anything that is purely resistance such as heaters and the like...the gen set will only do what it can...

ie if the heater is 2500watts there is no way that it will be at full output capacity if only 1000watts is going in...all your getting is 1000w of heat out...you wont be getting 2500watts......

This would be cheaper to run than gas and reverse cycle airconditioning for heating if it was.....

So in short.....your being misled in your thinking!

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FollowupID: 378124

Follow Up By: Nudenut - Sunday, Jul 31, 2005 at 16:48

Sunday, Jul 31, 2005 at 16:48
oh and incidently...your the one now giving us bullbleep! lol lol
couldnt resist that so hope no offence is taken
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FollowupID: 378125

Follow Up By: Alloy c/t - Sunday, Jul 31, 2005 at 17:21

Sunday, Jul 31, 2005 at 17:21
oh nudenut I COULD NEVER TAKE OFFENCE by one or more of your replies LOL , but ,the big but , is are we in context to the original question ,? will a $98 gen do the job ??? the answer is YES it bloody well will with some reserve ,,, to go into more detail we require your expertise as a fridgie ,,, ohhhmmm ,ammmmps ,volllllllts, waaaaaaatts,,the coefficient to the angle of the renrty of the gas to the exit velocity of the said gas to be at optimum smell and pressure to be safe in this scenario ,, methinks bummer. LOL
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FollowupID: 378138

Follow Up By: Nudenut - Sunday, Jul 31, 2005 at 18:02

Sunday, Jul 31, 2005 at 18:02
but none the less...you cant get 2500watts output from 1000watts input!
tis a pity your ignorance and arogance lol
you ought to take note yourself on what he asks? before you reply with statements that are at best misleading

can it do the job? god only knows...how big is his 3 stage charger? does it pull more than the output of genny? without the facts can you honestly say the 980 gennie can do it without damage to whatever?

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FollowupID: 378141

Reply By: joc45 - Sunday, Jul 31, 2005 at 18:37

Sunday, Jul 31, 2005 at 18:37
Won't get involved in the above session, but the Bunnings genny should be roughly sine-wave output (it's a proper alternator, not a synthesised alternator), and should provide about 700 watts of power to a resistive load. On that basis, I'd say that it would be safe and would run your 3-stage battery charger.
That's all I'm gonna say
Gerry
AnswerID: 123032

Follow Up By: lifeisgood - Tuesday, Aug 02, 2005 at 00:14

Tuesday, Aug 02, 2005 at 00:14
They are certainly a bargain price.My 850 watt unit is fine for running a light or two and a power drill for example. It also has a small dc output for battery charging but this is unregulated and at 15+ volts will get a medium size battery gassing fairly quickly (not good).
I have tried the 240v ac driving a 5amp automatic regulating charger but it cant handle the rough waveform input.
I am going to try bringing down the dc output a little by using a panel of inexpensive diodes (in4004 in parallel for current and series to drop the voltage a bit.) (each one in series should drop the voltage by about 0.7volt) I dont think I would run a notebook computer directly from it.
I wouldnt want one anywhere near me in the bush however. They are not Honda quiet but hopefully will give Honda a price fright! They need one.
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FollowupID: 378328

Follow Up By: joc45 - Tuesday, Aug 02, 2005 at 12:37

Tuesday, Aug 02, 2005 at 12:37
I would guess that the alterator does not like the high current switching pulses drawn by the charger. This would affect the internal alterator regulator. In most of these alternators with an aux 12v output, the regulator works only on the 240v AC output, and the 12v output varies a lot, depending on the 240v load. An analog regulator on the 12v would work, but get pretty hot. A switching reg would probably upset the alternator as well. The diode idea may be the easiest, if not the prettiest way of solving the problem.
As an aside, I have found that my Trojan aux battery needs the occasional 15v charge to get the sg's up; the 14.2v from my vehicle alternator or same from my regulated charger not sufficient to bring the battery up properly to sg1250+. My solar reg does bring the batt up to 15v briefly, then drops back to 14.2, which seems to be what the batt likes.
Whoops! I said I wasn't going to say any more on this topic!
cheers, Gerry
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FollowupID: 378396

Reply By: Member Jeff & Lyn (WA) - Monday, Aug 01, 2005 at 00:02

Monday, Aug 01, 2005 at 00:02
Hi greg &gail
We used a gmc 2 stroke 750 watt on a recent trip to the north west and to our surprise it worked well.
So dont fix that dont need fixin

Jeff & Lyn
AnswerID: 123089

Reply By: lifeisgood - Tuesday, Aug 02, 2005 at 00:28

Tuesday, Aug 02, 2005 at 00:28
Hi Guys I am interested to know what sort of things you used the genny for.
Some comments suggest severe overloading-- which will pull the voltage down (watch the lights dim) which may adversely affect some equipment. Did you operate a small TV on 240v for instance? ( if reception was in range) Did you get static on the radio, especially am band? Did you try 240v battery chargers?
AnswerID: 123264

Reply By: angler - Sunday, Aug 21, 2005 at 21:47

Sunday, Aug 21, 2005 at 21:47
I did a couple of tests with my 750 watt genny and had it running 700Watts of incandesant lights for about an hour with no problems.
The 12 volt output is around 15V but drops greatly when used for charging. Probably lifts as charge voltage increases.
I put some waveform pictures on my web site.

www.bycompass.com

go to the "of interest" pages.
AnswerID: 126229

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