Inverters

Submitted: Wednesday, Apr 26, 2006 at 12:36
ThreadID: 33257 Views:2208 Replies:12 FollowUps:22
This Thread has been Archived
I checked the archives, but there doesn't appear to be a suitable answer to my conundrum. I'm thinking of an inexpensive inverter, merely to recharge camera batteries and the like.

Would an el cheapo inverter do the job without damaging the rechargeable batteries??

Some of our gear doesn't have the facility for recharging off 12V, hence my thoughts of an inexpensive mod sine wave jobbie, perhaps only 100W, if such an animal exists.

Suggestions ???

Cheers

Rosco
Back Expand Un-Read 0 Moderator

Reply By: Mr Fawlty - Wednesday, Apr 26, 2006 at 12:54

Wednesday, Apr 26, 2006 at 12:54
Hey Rosco, try Dicky Smith or Jacar... I recently saw in Aldi a small inverter that was can sized that could be sat in a drink holder. Supercheap had some smaller inverters as well. Repco has smaller ones as well, so safe to say that they exist.

Not sure about recharging Ni Hydride but Ni Cad definatley like a bit of a ripple in the charging current. Ni Cads die when dendrites grow internally and "short out' the Centre electrode with the case usually the cathode, Can be regenerated by "zapping" with a higher voltage to dissolve the dendritic growths...
AnswerID: 169059

Follow Up By: Rosco - Qld - Wednesday, Apr 26, 2006 at 13:02

Wednesday, Apr 26, 2006 at 13:02
........dendritic growths...

Sounds like the sort of crap I get off my teeth with dental floss .. LOL

So are you saying a cheepie may not suit??
Only tallking about the odd recharge over a period of a few weeks/month??

Cheers
0
FollowupID: 424401

Follow Up By: Mr Fawlty - Wednesday, Apr 26, 2006 at 13:23

Wednesday, Apr 26, 2006 at 13:23
No... A cheapy should go ok if you want to charge batteries via a 240 Volt charger. The charger should cope with any extranious spikes etc from the inverter as it should have its own power conditioner in it. People make out that the mains are "pure" 240vac but hey sorry they can be all over the place with voltage spikes, and as for staying at a constant 50khz... yeah well pigs can fly...
0
FollowupID: 424408

Follow Up By: V8troopie - Wednesday, Apr 26, 2006 at 17:39

Wednesday, Apr 26, 2006 at 17:39
I'm sure is a typo, the 50 kilo Hz you mention...
As to being stable, consider this: the frequency is determined by the rotary speed of the alternators at the power station. Where several stations are connected in a power grid, ALL the alternators have to generate exactly the same frequency and phase.
It would be very difficult to speed up or slow down ALL of them unless you find a way to remove a very large portion of the load or add a very large load on the grid.
I would think that over a 24 hour period the average frquency is very close to exactly 50Hz and for short instances varies by less than 1 Hz.
Klaus
0
FollowupID: 424466

Follow Up By: Member - Mike DID - Thursday, Apr 27, 2006 at 20:23

Thursday, Apr 27, 2006 at 20:23
The accuracy of mains powered clocks is based purely on it being 50.0000Hz. The electricity generator authorities count the cycles and will trim the frequency to keep the clocks accurate.

To produce a chnage in the 50Hz frequency you would have to change the speed of hundreds of tons of rotors in all the generators connected to teh network.

Mike
0
FollowupID: 424693

Reply By: Member - Norm C (QLD) - Wednesday, Apr 26, 2006 at 13:03

Wednesday, Apr 26, 2006 at 13:03
I've had no trouble so far using a Mr Inverters 350W Inverter ($160) to charge laptop, camera batteries and AA NiMH batteries. I went the bigger one so we can plug more in at once while driving, rather than charging at rest and using battery power. Still a very small unit.
AnswerID: 169066

Follow Up By: Member - Tony W (VIC) - Wednesday, Apr 26, 2006 at 16:57

Wednesday, Apr 26, 2006 at 16:57
how long you had the inverter?in a similar conundrum ,pure sine or mod sine
pure sine bloody dear.
cheers tony
0
FollowupID: 424443

Follow Up By: Member - Norm C (QLD) - Wednesday, Apr 26, 2006 at 17:49

Wednesday, Apr 26, 2006 at 17:49
Tony, only about 4 months. Apart from the items I mentioned above, the other items I have used on it are a radio 240 V lighting and a domestic fan. Don't normally run lighting or the fan off it, but gave it a try. We will carry the fan on our upcoming trip to the far North. Might come in handy.
0
FollowupID: 424469

Reply By: Bros 1 - Wednesday, Apr 26, 2006 at 13:32

Wednesday, Apr 26, 2006 at 13:32
ROSCO,
Dick Smith has 12V cig lighter chargers. Can charge 4 x 1.5 Nimh or Nicad AA and AAA. One is DSI Chinese brand and the other is Energizer brand. Around 60 - 80 Oxfords and you also get a 240 V adapter. Not sure of the quality.
Cheers,
Bros.
Work is the curse of the down and out bludger.

Lifetime Member
My Profile  Send Message

AnswerID: 169074

Reply By: ro-dah-o (WA) - Wednesday, Apr 26, 2006 at 13:35

Wednesday, Apr 26, 2006 at 13:35
Waeco have a very inexpensive inverter (about 100w me thinks and about $60) which is available from waeco dealers.

I have a 150w Dicksmith job (digito brand) and have had no probs with it. Has a built in voltage sensor so it will cut the power if the supply is too low or the appliance draw is too high. I use it to recharge camera batteries and to power the laptop, and have had no problems at all.
AnswerID: 169075

Follow Up By: ro-dah-o (WA) - Wednesday, Apr 26, 2006 at 13:37

Wednesday, Apr 26, 2006 at 13:37
Just remembered, the waeco ones are the can size inverters, compact and well priced.
0
FollowupID: 424410

Follow Up By: slave - Wednesday, Apr 26, 2006 at 13:50

Wednesday, Apr 26, 2006 at 13:50
We have the same inverter and use it to charge the video and still camera batteries. Charged a friends laptop across the Simpson okay as well.
On the box ours says it will also run small TV's and videos and kitchen appliances, never bothered with that, after all we are camping ( also says it will run a sewing machine, just have to leave one of the kids home to fit it in lol)

Mrs Slave
0
FollowupID: 424412

Follow Up By: Mr Fawlty - Wednesday, Apr 26, 2006 at 17:05

Wednesday, Apr 26, 2006 at 17:05
Oh Mrs Slave, how do you cope without a sewing machine, Sybil is into Quilts so spends every waking moment while we are away quilting...At one stage there was a request to make a tray so that the Quilting could be done on the move. I've had her referred to a psycholigist...
0
FollowupID: 424445

Follow Up By: slave - Wednesday, Apr 26, 2006 at 19:11

Wednesday, Apr 26, 2006 at 19:11
Easy Mr Fawlty I take the Hand Piecing in a wooden pistol box lol

I have been doing a paperplates for a couple of years, all pieces are prepared before hand ready to piece, now have instructions to make a Manx Quilt only I will take the easy way and precut my strips with the rotary cutter not measure with my thumb cut with a knife and rip !

Mrs Slave
0
FollowupID: 424495

Follow Up By: Mr Fawlty - Wednesday, Apr 26, 2006 at 20:16

Wednesday, Apr 26, 2006 at 20:16
A Manx Quilt??? Presumably it has no tail LOL....yes... i've actually forbidden the use of rotary cutters in caravans for reason that become obvious when you are trying to eat & the table has to be used to lay fabric on....
0
FollowupID: 424512

Follow Up By: slave - Thursday, Apr 27, 2006 at 09:14

Thursday, Apr 27, 2006 at 09:14
I don't have the luxury of a caravan. With 2 teenage kids we have learnt to minimise everything. If it won't fit in the Patrol it doesn't come...... lol

Mrs Slave
0
FollowupID: 424595

Reply By: Member - bushfix - Wednesday, Apr 26, 2006 at 13:39

Wednesday, Apr 26, 2006 at 13:39
G'day Rosco,

Bunnings/kmart sell the projecta 300W modified sine wave jobbies for $80 and come with leads. Bargain matey!
AnswerID: 169076

Reply By: Rosco - Qld - Wednesday, Apr 26, 2006 at 13:45

Wednesday, Apr 26, 2006 at 13:45
Thanks for the tips blokes. I don't know my ar$e from my elbow about matters electrical, but my limited thinking is that the 240V goes through a transformer back down to whatever V DC, hence I would have thought any dodgy current would be tidied up through the transformer. But as I said .. I don't know sh1t from chewed dates. ;-))

Cheers
AnswerID: 169080

Follow Up By: Mr Fawlty - Wednesday, Apr 26, 2006 at 17:06

Wednesday, Apr 26, 2006 at 17:06
Rosco, the chewed dates taste sweeter...
0
FollowupID: 424446

Follow Up By: Rosco - Qld - Wednesday, Apr 26, 2006 at 21:55

Wednesday, Apr 26, 2006 at 21:55
Ahh ... now I know why I can't get that bloody taste to go...
0
FollowupID: 424551

Reply By: Geoff M (Newcastle, NSW) - Wednesday, Apr 26, 2006 at 14:49

Wednesday, Apr 26, 2006 at 14:49
As others have mentioned, see Can Inverter

Geoff.
Geoff,
Landcruiser HDJ78,
Grey hair is hereditary, you get it from children. Baldness is caused by watching the Wallabies.

Lifetime Member
My Profile  My Blog  Send Message

AnswerID: 169096

Reply By: Member - Loco Locums - Wednesday, Apr 26, 2006 at 14:57

Wednesday, Apr 26, 2006 at 14:57
And so the saga continues with Superbly Cheep Autos offering a 330w inverter for $89.00 and a 500w unit for $149.00.

Soon they'll be giving away a free inverter with every box of matches sold.....
AnswerID: 169098

Follow Up By: Mr Fawlty - Wednesday, Apr 26, 2006 at 17:11

Wednesday, Apr 26, 2006 at 17:11
Yeah, but I'm waiting for Tim Shaw to start giving them away as an accessory to his electric take anywhere can opener...
0
FollowupID: 424450

Reply By: Derek from Affordable Batteries & Radiators - Wednesday, Apr 26, 2006 at 17:33

Wednesday, Apr 26, 2006 at 17:33
I would use a brand name one and they do work on laptops and camera's.

My choice would be the Projecta 500W inverter with 2 outlets. You can charge 2 sets of batteries at the same time.



Regards Derek
AnswerID: 169130

Follow Up By: Member - Tony W (VIC) - Wednesday, Apr 26, 2006 at 18:50

Wednesday, Apr 26, 2006 at 18:50
derek have some concerns on whether to purchase a tru sine or mod sine just shelled out $400 for a iriver (ipod)dont want to bugger it or my vid cam battery, on my trip around oz most inconvient ,not mention $$$

thanks tony

0
FollowupID: 424487

Follow Up By: Derek from Affordable Batteries & Radiators - Wednesday, Apr 26, 2006 at 19:22

Wednesday, Apr 26, 2006 at 19:22
I use the 500w Projecta on 2 of my laptops, a Canon video camera and a Canon 20D. There is no problem with these products. Value exceeds $10000.00.

Regards Derek.
0
FollowupID: 424499

Follow Up By: Member - Darren T (VIC) - Thursday, Apr 27, 2006 at 19:15

Thursday, Apr 27, 2006 at 19:15
G`day Derek,
How much are one of these inverters worth?? (I assume you sell these on your site, or like usual, am I assuming wrong??? :) )

I`m looking for something like this to run a laptop and recharge batteries for PDA, camera, mobile phone etc etc at the same time.
0
FollowupID: 424685

Follow Up By: Derek from Affordable Batteries & Radiators - Thursday, Apr 27, 2006 at 19:21

Thursday, Apr 27, 2006 at 19:21
Visit my site ABR for more info.

Best to make a purchase enquiry as the forum is for advice and information only.

Regards Derek.
0
FollowupID: 424688

Reply By: Neil & Pauline - Wednesday, Apr 26, 2006 at 21:40

Wednesday, Apr 26, 2006 at 21:40
I have done a lot of research and enquiry re modified sine wave as against pure sine wave. Any electriction I have met has pure sine wave as they choose not to be replacing expensive electronic equipment. It is not about the 50hz but rather how it gets there. Modified sine wave is square and pure is curved. Same as going over corrugations on the road. They naturally form with rounded edges but if they were square (height the same) the tyre life would be much less. Same with electricity. Any thing electronic or motor will be suseptable to damage / reduced life with modified sine wave.
If it seems too good it probably is.
Neil
AnswerID: 169198

Follow Up By: Rosco - Qld - Wednesday, Apr 26, 2006 at 21:58

Wednesday, Apr 26, 2006 at 21:58
I hear what you're saying Neil, and if motors or electronice etc were involved I would agree. But when the current is being filtered through a transformer back to lower voltage DC I wonder whether this is an issue for merely charging batts

Cheers
0
FollowupID: 424552

Follow Up By: Robin-Outback - Wednesday, Apr 26, 2006 at 23:35

Wednesday, Apr 26, 2006 at 23:35
Would never use a modified on electronic gear charging battery or powering directly.
Transformers are no longer used and the power supplies are switch mode. Modified square wave can interfere with the switch mode control and cause batteries to under or over charge. Power supplies can go from warm to alarmingly hot to working properly. It is a gamble if the gear will work 100%. Motors will generally take 20% more power on modified square. If power consumption is an issue modified square are 80 to 85% efficient and sine wave are 90 to 94% efficient. The major thing with any inverter is to make sure they are electrically isolated between the 12v battery input and the 240v AC output voltage
whatever type of inverter you buy modified or sine suggest you look at Jaycar The Jaycar inverters are known for quality great price and reliability
0
FollowupID: 424569

Reply By: Neil & Pauline - Wednesday, Apr 26, 2006 at 22:22

Wednesday, Apr 26, 2006 at 22:22
Rosco
From my understanding it won't hurt the batteries but will not be good for the charge. Chargers are electronic
Neil
AnswerID: 169209

Follow Up By: Neil & Pauline - Wednesday, Apr 26, 2006 at 22:25

Wednesday, Apr 26, 2006 at 22:25
left off a "r" from the first charger. might make more sense now.
0
FollowupID: 424559

Reply By: Sand Man (SA) - Thursday, Apr 27, 2006 at 08:56

Thursday, Apr 27, 2006 at 08:56
Rosco,

There appears to be too many ill-informed people giving poor advice on this topic.

Your stated need is to charge camera batteries via a charger unit and for this purpose, a modified sine wave Inverter (MSW) will do the job without damage to your charger, or the batteries connected to it.

You can buy a good quality unit from Jaycar for as little as $49 for a 150 watt MSW Inverter, or $89 for a 300 watt MSW unit. If size (space) is an issue they also have the "can style" 140 watt MSW units for $69.95 according to their catalogue.

If you intend using the Inverter for other purposes, including things such as a Laptop (some of which will not operate from a MSW Inverter), then and only then, would I consider the more expensive pure sine wave units.
These have reduced in price considerably in recent times.

Jaycar sell a pure sine wave 300 watt unit for $289 and at only 60 dollars more than a 150 watt unit, this is the one I would recommend IF you wished to invest in a Pure sign wave Inverter.

I have referenced Jaycar purely because they have a good online reference on the equipment they sell. Dick Smith's may offer similar equipment but their web site is very poor to negotiate.

As Derek has mentioned, there is also the Projecta brand units.

The final choice is up to you, the use you wish and how much you are prepared to pay.

Hope I have adequately explained the different options for you and removed some of the myths surrounding the Inverter saga.
Bill


I'm diagonally parked in a parallel Universe!

Member
My Profile  My Blog  My Position  Send Message

AnswerID: 169269

Sponsored Links

Popular Products (13)