24vdc 20amp power supply /welder?

[rgormley]

As I have just switched over to a 24vdc inverter.

I need a good size 24vdc power supply to boost from time to time....

i have a 24v /14amp switch mode P/S works great but i need more oommph!

When the sun don't shine all day my batts sag a little and i use a dc power supply to keep them at 24v

What kind of output would those el cheapo welders on ebay put out? ac or DC

Any suggestion for a cheap device that i may be able to "mod/hack" to get 24v at 20 amps or so??

Thanks....

Richard

[Norm]

 

Most small 110 volt welders put out  just AC

lot of dancing around to modify ......end up not

being so cheap in the long run.

Have you ever thought about using your lawn mower

hooked up to an alternator ? I think they do

have 24 volt alternators?

Maybe 2 similar 10 amp battery chargers or 1 to charge 1/2 the bank at a time?

   

[catweazle]

Firstly, you shouldn't be using a power supply to charge batteries. You should be using a battery charger for that.

Secondly, welding machines are not designed to be battery chargers. Different horses for different courses.

Thirdly, the difference in 'oomph' between a 14 A and 20 A power supply is negligeable; just 50% more current. It would at best reduce your charging time for a 100 Ahr battery bank from 7 hours to 5 hours.

You give absolutely no information about your system so no one can really help you.

You want cheap or you want something good that will keep your batteries happy and healthy for a long time ? A proper battery charger is the cheapest investment you can make to get the maximum out of an expensive batterybank.

[martin1]

I've tried a welder transformer and they are not good for charging batteries. The idle voltage is about 40 V ac and stays about the same when loaded. I would suggest that you try 2 old computer power supplies.

[Boss]

My Internet has been down for the last two days, sigh.

I want to transmit 24volts DC through my WiFi connection to my remote relay tower.

Where did Tesla get off to?

Smiles

Just kidding

I wish i had some way to monitor battery condition via Ethernet

I also wish I had built in a external battery connection to my rig on the mountain, so that when I still could drive to the mountain top location I could have given it a good charge.

http://outfitnm.com/HTML/wifi.html

 

[Clifford]

Depending on how you want to monitor your battery voltage, you should be able to computerize it (at the cost of running a computer).

Most APC UPS units have serial out.  Perhaps some would even be stand-alone with ethernet out.

In fact,

If you are looking for a UPS-like system.  

A UPS will both charge and discharge batteries, depending on how you feed the power.  Several are also 24 volt.

At one time I wanted to try to yank just the inverter out of an UPS (hopefully avoiding some unnecessary circuitry.  But, it didn't quite work like I had hoped.

There are plenty of 24 volt battery chargers available.  

Unfortunately, the one problem that I've had with some battery chargers is getting the amps set.  And, I think some of them do waste a bit of power.

[rgormley]

Firstly, you shouldn't be using a power supply to charge batteries. You should be using a battery charger for that.

*****************

long time since i`ve read back here ,..sorry...

i have since sold of my old system and will getting a new 2kw grid tie...  11x 180watt +fronius IG30

i still have my old batt/3kw 24 volt inv and the 600 watt switch mode power supply.

would it be feasable to run the switch mode P/S into my exsisting PWM charge control system to charge/float the batts?