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Messages - veggie

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391
Everything else / Re: Solar - 24vdc Panel with 12vdc Charge Controller
« on: September 05, 2019, 11:52:26 PM »

Thanks Glort,

I might order a couple of them myself actually, I found a good small Panel I was given a while back and I  thought about putting it up the back in the machinery shed and putting it on the  tractor as the regulator is not working on that and I am just recharging the battery every so often which isn't great for it.
  In any case sometimes it's a couple of weeks before I use the thing so having a charger on it would be much better.

That's the exact reason I bought two.
My tractor can sit for months before I use it. I want to use my second 50 watt panel to keep the battery charged.
However, I'm not sure that this little controller is smart enough to scale back when the battery is full.
Will have it investigate.

392
Everything else / Re: Solar - 24vdc Panel with 12vdc Charge Controller
« on: September 05, 2019, 02:46:26 PM »
Thanks Glort,
I assume you are talking about the module shown in the picture below...
From what you have seen, will it work as a crude charge controller with my 24-34vdc panels charging a small 12vdc battery?
I have a 50W (24vdc) panel and wish to solar charge a small gel-cell battery which powers a micro-controller at a remote site.

Mine have still not arrived  :-[

393
General Discussion / Re: Hurricane Dorian
« on: September 02, 2019, 10:04:59 PM »


Good luck all you Florida dwellers.
This is where the wife praises you for buying that Lister(oid) or the very loud Changfa.

394
Lister Market Place (things for Sale) / Re: New Listeroids for sale
« on: August 29, 2019, 02:26:55 PM »

Good luck with you project. I am sure that an enhanced quality Listeroid engine will have lots of buyers since there has been a shortage in the USA for several years now. Please keep us informed of your progress.

395
Everything else / Re: Solar - 24vdc Panel with 12vdc Charge Controller
« on: August 28, 2019, 02:23:04 AM »
Glort, did you receive your eBay MPPT converters yet?
I'm curious to see how they work.
Mine are still 4 weeks away.

396
Lister Market Place (things for Sale) / Re: New Listeroids for sale
« on: August 28, 2019, 02:07:00 AM »
"So I wondered where you earned your engineering degrees, how many diesel engines you have imported and how many years you have been in business?? Curious."

I have imported a lot of Chinese and Indian engines but that does not make me an expert on engines.
Owning a business does not mean that one can make an Indian engine into something that it's not.
An engineering degree should help one understand the limitations of reaching 50,000 hours on a non-precision engine built from average metallurgy and inconsistent clearances in critical places.

Some of the people on this forum have had extensive experience dealing directly with Rajkot companies. People like Mike Montieth have flown there and discussed quality issues with them. But the story always ends the same way. They promise the moon and deliver much much less.
Most of their antiquated machinery cannot hold tolerances that are needed for consistent quality. Castings are consistent poor quality and a lot of filler paint is used to hide defects.
Many components are still hand drilled, hand tapped, or pounded from tin by hand.
I have had firsthand experience and many such discussions with them only to be disappointed time an again.
In my opinion the only way one would stand a hope of delivering consistent quality is to station a quality control person at the factory and accept/reject  the components and clearances as the engines are built. That is how larger corporations deal with many Asian manufacturers.
Only my humble opinion of course.


397
Everything else / Re: What is a "Switching Power Supply"
« on: August 23, 2019, 01:13:03 AM »

Very good explanations.

Thanks guys.

398
Everything else / What is a "Switching Power Supply"
« on: August 22, 2019, 09:02:02 PM »
Excuse my ignorance but...

What is a "Switching" power supply vs other power supplies?
And when does one need a switching power supply.?

399
Lister Market Place (things for Sale) / Re: GM90 + gen head on craigslist
« on: August 19, 2019, 05:49:40 PM »
hwew,

Topland, Satyajeet, and Lovson all list the 6HP GM90 as their smallest model.
http://www.topland-india.com/products/engine/htm/engine_3.htm
Perhaps the mini 4HP unit is no longer made.
If I could find them, I would consider taking a run at getting a few here.

400
Everything else / Re: Solar - 24vdc Panel with 12vdc Charge Controller
« on: August 19, 2019, 05:38:38 PM »

Thank you for the translation "Mr Glort Yakimov"   ;D

401
Lister Market Place (things for Sale) / Re: GM90 + gen head on craigslist
« on: August 18, 2019, 04:48:38 PM »
Hi hwew, good to see that you're still around :-)

THEY HAVE A TINY 3HP GM90 UNIT ? ? ?
What !

I have to look into this. If I had known that I would have brought a container load when I imported my inventory a few years ago.
That would be a perfect combination of size and reliability.
After several years of dealing with Satyajeet I did not here about a smaller 3HP version.

Could it have been their TRB-90A 3HP engine?
Different configuration than the GM90.

402
Everything else / Re: Solar - 24vdc Panel with 12vdc Charge Controller
« on: August 18, 2019, 04:40:34 PM »
 I couldn't find any specs either, however there are a few videos (if your Russian is good)
Here the fellow looks to be feeding 24 VDC and tuning the output to 12 VDC
https://www.youtube.com/watch?v=3btBG0DtSEs

Here a fellow is testing the unit with instuments.
No dialog, but maybe BruceM and Glort will understand what the heck is going on.
Part 1:
https://www.youtube.com/watch?v=h0G2XQceHCM
Part 2:
https://www.youtube.com/watch?v=ROOU8c9TgM0

403
Everything else / Re: Solar - 24vdc Panel with 12vdc Charge Controller
« on: August 17, 2019, 10:31:43 PM »
Quote from: glort on August 17, 2019, 04:41:28 PM
Quote from: BruceM on August 17, 2019, 02:50:26 PM

 You might be able to find a 24/12V PWM controller that can do directly what you want,

In any case, I got a couple of these on order that should do the Job:

https://www.ebay.com.au/itm/5A-MPPT-9V-12V-24V-Solar-Panel-Regulator-Controller-Battery-Charging-Auto-Switch/282624044890?_trkparms=aid%3D555021%26algo%3DPL.SIMRVI%26ao%3D1%26asc%3D20190711100440%26meid%3Df9c476a752e84f6382173eb02ddf7d28%26pid%3D100752%26rk%3D2%26rkt%3D16%26mehot%3Dag%26sd%3D233167705792%26itm%3D282624044890%26pg%3D2047675&_trksid=p2047675.c100752.m1982

Being MPPT they should handle the 24 to 12 Down rating and are also adjustable for the desired end voltage.


Nice find Glort !
 I ordered a couple for myself.

404
Everything else / Re: Solar - 24vdc Panel with 12vdc Charge Controller
« on: August 17, 2019, 02:31:09 PM »

Thanks for the guidance fellas. I'll give it a try.  :)

405
Everything else / Solar - 24vdc Panel with 12vdc Charge Controller
« on: August 17, 2019, 01:54:57 AM »
Hi All,

I came across this video where a fellow uses a small buck converter to match a 24 volt (28 -34 vdc) solar panel
to a 12 volt charge controller to charge a small gel cell battery.
https://www.youtube.com/watch?v=AD7g5BNy5fM

This interested me because I have a few 50 watt (24 volt) panels and I would like to use them on some protects involving 12 volt gel cell batteries and a microprocessor. I also have a few cheap Ebay buck converters kicking around.
Now granted, this may not be the best accepted practice, but if one has the components sitting around collecting dust, maybe it's ok.
So my question is...
Does anyone see a problem with this setup when used for small batteries and low amperage?
I'm not really concerned with efficiency. I just want to use a surplus 24 volt panel to charge a small 12 volt battery using a 12 volt charge controller.
The microcontroller would run 24/7 so it will draw from the battery constantly.
Battery charges in the day and draws down at night.
I am aware of the necessary depth of discharge limitation that I must consider with the microcontroller draw.
I have multiple 50 watt, 24 volt panels if needed.



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