testing the egs002 inverter board

[Antman]

Thanks RF. I've ordered the boards this afternoon so hopefully they come early next week.

Have a look at this Chinese take on a power board based around the EGS002. I actually think they've done quite a good job on the layout. It has some similarities to mine. The power ratings are fairly modest too by China standards.

https://world.taobao.com/item/522948147797.htm?fromSite=main&spm=a312a.7700846.0.0.xamBYI&_u=l1rmv006e1e6

[RFburns]

Yes I have seen this board and was wondering what they were using for FET's (I could not get a good enough view to see) and what the connectors on the end were for (LCD?). This is much more complex then Oztules version. RF

[oztules]

Darn good looking board...... glad I built mine first, otherwise I would have bought that ... and learned nothing, but gee looks like a good unit.

HY4008 fets good choice too.

For anyone not sure how to do their own, I would give this a go....

I'm much happier with mine simply because of the ease of repair... 3 plug in chips.

nice.


...........oztules

[Phred]

Thanks RF. I've ordered the boards this afternoon so hopefully they come early next week.

Have a look at this Chinese take on a power board based around the EGS002. I actually think they've done quite a good job on the layout. It has some similarities to mine. The power ratings are fairly modest too by China standards.

https://world.taobao.com/item/522948147797.htm?fromSite=main&spm=a312a.7700846.0.0.xamBYI&_u=l1rmv006e1e6

My Chinese is atrocious in other words zilch. Spent a few hrs trying to wade thru' Taobao to figure out how to contact the seller.....no joy. Has anyone managed to buy one. If so please`post a how to

[billy]

Oztules, what will your next project be when your done this one, I'm hoping for a good mppt controller hehehe.http://www.anotherpower.com/board/Smileys/default/smiley.gif


Billy

[RFburns]

Antman looks like you have to install a comms programme to talk with the seller (highligted on the right hand side). It would appear to be pretty good value @ $71.00 + (shipping could be any thing though) for the 48v 5500Va unit (all units from 24v3000 Va are the same price the 12v unit show's as $68.88) they also offer a range of transformers to match(wild looking bit of gear) https://world.taobao.com/item/36491177887.htm?fromSite=main&spm=a230r.1.14.23.upW19u&ns=1&abbucket=13#detail up to 6Kw. They have added more photos since I first saw this  and a lot more information. RF

[oztules]

Yes  can see a few problems with it too... but easily overcome.

It is designed again for EI transformer. The transformer in the pics is also a cheap welded unit.... idle current will be no better than the old W7.... and this is where we started from in the first place. Welding on a transformer means by definition... higher eddy currents and heating

I note as well they found the dynamic head room is less than thre PJ and this is reflected in the turns ratio they recommend for the transformer... ie pj would be 30v:240v where these will be 26v:240v

Thats why I had to take three turns off for my 24v pj5000 conversion.

A torroid and inductor will fix this, but then you will have to cut out the 393 on the 002 board.

With these changes, I suspect a good house driving unit.... not as high power sustainable perhaps as the PJ fet boards can do... but better than a whole lot of units out there with fancy branding and huge price tags.

If I didn't have so many inverters laying around the place that can blitz it as is.... I would have to get one or two to play with.... but it does not offer any improvement for me.

.............oztules

[oztules]

Billy.... I dont use mppt, and never will.
Not because I don't think it is useful, .. it is useful, but only if you build a miss matched ( poorly thought out) system.

I can't use a mppt in my system, as it would not help it at all... not even a little bit.

If you choose you cell size properly ( ie 6x6 not 5x5 ) for the same size panel you will end up with greater gains than a mppt is capable of. So a 5x5 72/144 cell panel will be way over voltage for A 24V system @ 5.5a or thereabouts.... you need mppt big time.
But if you buy 6x6 cells, you will have 8.8amps before you do anythin, and only a small differential to overcome.... which is too small for the buck to be useful for.

So the wrong panel selection costs you over 30% losses which you then try to make up with mppt.... not for me.

Secondly , a buck failure in the mppt may cause savage over charging, as your start voltage is way over the top, where in the 6x6 cell units, they will drive a bank up to just over comfortable equalise charge.

So no hope of me playing with them.... but they are simple enough, use a nano and buck.

..........oztules

[billy]

Ok Oztules, thanks for that great info, I think I have the larger cells so Im good .


Billy

[oztules]

Billy, do you have the address for the mos boards on ebay, did not find them as yet

3kw to 8kw are the same board, 10 and 15 electrically then same, but bigger.

With the new 8010 board of mine, I  think the 8kw will be enough under all circumstances, it runs cooler than the pj electronics form the tests so far... much cooler.

............oztules

[Phred]

Antman looks like you have to install a comms programme to talk with the seller (highligted on the right hand side). It would appear to be pretty good value @ $71.00 + (shipping could be any thing though) for the 48v 5500Va unit (all units from 24v3000 Va are the same price the 12v unit show's as $68.88) they also offer a range of transformers to match(wild looking bit of gear) https://world.taobao.com/item/36491177887.htm?fromSite=main&spm=a230r.1.14.23.upW19u&ns=1&abbucket=13#detail up to 6Kw. They have added more photos since I first saw this  and a lot more information. RF

To get a English translate it can be be done 2 ways
 1 use google page translate.......http://itools.com/tool/google-translate-web-page-translator
 2 After the site page loads pull down the menu ??
 then select select language then the language u prefer
 

[Phred]

Parallel driver board
https://world.taobao.com/item/524775334183.htm?fromSite=main&spm=5706.1529727.a31f1.2.4Zcxix&scm=1007.11502.21311.100200300000003&pvid=5e38a6d6-266b-4dac-a971-1eb99e9b3135

[billy]

Oztules,

here it is, this is for the 5kw mos boards , but i did see the 8kw boards yesterday

http://www.ebay.com/itm/262326559176

billy

[Phred]

Oztules,

here it is, this is for the 5kw mos boards , but i did see the 8kw boards yesterday

http://www.ebay.com/itm/262326559176

billy

don't ship to Oz

[oztules]

This is as good as I can get it for the time being into a big EI



............oztules