S007:


This must be a very good ketekete(horse)
Gennex Inverter (Axpert clone) bookmarked.

NiyiOmoIyunade:
... What I don't know is if Oga Barezzi has one 10kva unit or 2 units of 5kva stacked in parallel

Barezzi:
I use mine with a 2kw hotplate and 2kw electric kettle simultaneously every morning 5 days a week for almost a year now.
This is with other loads of fridge, booster pump and other base loads.

I use a 10kva Gennex Inverter (Axpert clone).

pranil:


For those considering axpert clones I would suggest to import the MPPSOlar 5KW 61 V model or get the South africa version) they are built to a diffrent standarad the standard model PIP 4048MS ( Ipower gennex) are essentially 4 KW 48 V ( peak 58 V)while the new are 5048 ( 5 KW 48 V peak 64 V)

NiyiOmoIyunade:
So I let this sit for a while, then I went back to reread the original question and responses offered.

I agree with Oga Chris, DMerciful and yourself about the typical constraints of transformerless inverters in general viz a viz the type of loads they can easily carry and I said as much in my response to Oga Chris.

When I think about it, how a device actually behaves with a load is specific to its own internal design and operating environment - so I have been at a residence where they used a 1.4kva/1.5kva Luminous to power a medium sized freezer and large fridge for years with zero trouble, yet I have a Sinergy 1.5kva (similar Indian design) that always beeps overload and trips off when my mid-size fridge's compressor picks up. Similarly and if I recall correctly, Zeestone once told me of the troubles he had using a PSC Solar or was it Contec 2.5kva inverter to power a large fridge/freezer - it kept beeping overload and tripping off. Now one asks, why would a 150w load that surges to say 1kw max present a problem to my 1.5kva inverter when it is the only load and ditto why does a 2kw/2.5kva inverter struggle with a 300w compressor?

I used a 3kw Rubitec(Must PowerStar IR type) for about 2 years (replacement for my Zinox) and routinely loaded it 2.8kw and it ran without trouble - I would have the 1hp AC on plus ironing or microwave so always either AC + Iron or AC + Microwave and other light houseloads including fridge and water dispenser, sometimes 2hp AC + Fridge + Water Dispenser and it ran. Yet I know a location who bought one of the earlier 7.5kva Prag inverters which had a similar MustPower design and the machine broke several times on running 2 ACs (2hp and 1.5hp) + 2 freezers and other general loads till the owner (a restaurant) abandoned it. One can go on and on.

Anytime Zeestone tries to get me to try a new product e.g new 5kva Inverter or new battery brand or any new stuff for a client, I always say 'let us stick with the one we know that is already tested and trusted' because I believe 3.5kva in one inverter brand may behave very differently than another 3.5kva of another brand - beyond the transformer type or design, many other aspects of the internal setup and operating environment will come to play.

This Zinox in question, I have seen used with 1hp AC and other basic houseloads and no trouble, as I have said in this post and several others before, it is an excellent inverter with many features provided it is used within its design limits and remember I actually recommended it to the OP as a good choice. In my own case I used it only with either of my iron or microwave (didnt dream of using AC on inverter at the time) and it broke within 3 months - the service center diagnosis was "power card damaged due to overload" - since the inverter has a digital display and I was always monitoring the load readout, I know it never passed the 2kw mark and it was mounted on the balcony yet the service center said it was overloaded and asked specifically if I had used microwave or iron on it. Again the unit I have was an early buy in 2015/2016 - perhaps newer models have all the flaws fixed. I think Oga Pranil mentioned loading it with 7kw of ACs (he has 2 units in parallel to make about 10kva), it would be nice to see how it holds up to running 7kw of heating or resistive loads for a while

mank1234:


Resistive vs inductive load which is more straining to inverter? I expected inductive load to be more cos contractors are rated to carry more power at resistive load but lower with inductive load.

NiyiOmoIyunade:
Oga Pranil,

Please do you have a link/source for this MPPSolar 5kW 61v Inverter?

I am hoping also that they have an inverter only version with no charge controller built in - this should bring down the price point significantly.

NiyiOmoIyunade:
Not this matter again o biko!

So the only new conclusion I can reach is that we either got lemons due to poor quality control or other factors were at play or all the positive testimonials got a different generation/different production batch and better quality inverters than we did although all still within thesame Axpert family.

pranil:
if you have budget you can get victron Multi ( 5 KW )900K NGN ( 10 KW peak ) they have multistage protections and handel overload extremely well and gracefully

Zero Load is between 15 W to 30 watt for 5 KW

https://www.victronenergy.com/upload/documents/Datasheet-MultiPlus-inverter-charger--800VA-5kVA-EN.pdf

https://www.youtube.com/watch?v=4SXtGIx0x5w

Saipro:


The one I tested has the following zero load consumption values:

Full power on: 33 - 40W
AES mode: 29 - 37W
Search mode: 15 - 17W

It's an earlier unit though (firmware xxxx1xx)

pranil:
I switched off just now the input-output solar reported 27 Watt including venus, Em 3 phase energy meter and a network switch ( 5 V , 1 Amp) attached to the same battery. NO AES firmware is 2657424

Saipro:
I want to DIY a Victron MK3 to USB cable. Or at least attempt to do so. Can anyone point me in the right direction?

kiekie1:
Schneider 250v DC breakers now available in 10a to 63a specs for your PV combiner box/array integration ! Call us now if interested

Contact,
Smartcell global services
081-350-31951

pranil:


if you want more products to stock pls. check following which might come up in demand as the PV voltages and overall sizes go up

I have not found these in the Nigerian market and had to import them when needed

http://uk.farnell.com/eaton/dmm-125-4-i5-p-b/switch-disconnector-4pole-690vac/dp/2455608

http://files.sma.de/dl/26599/Sicherungssteckverb-TI-en-11.pdf

https://www.leadergroup-cn.com/product/solar-panel-mc4-connectors-with-10x38-in-line-fuse-holder

http://www.cnsandi.cn/sdp/911164/4/pd-4607850/11787512-2535588/Professional_Solar_Energy_PV_Combiner_Box_Solar_Ju.html

pranil:


https://www.aliexpress.com/store/product/MPPT-Solar-inverter-5000w-48v-mppt-solar-charger-80A-60A-battery-charger-parallel-able/629424_32804613735.html

pranil:


I suggest you buy one as the time spent will be far disproportionate to the gains

https://www.victronenergy.com/upload/documents/Whitepaper-Data-communication-with-Victron-Energy-products_EN.pdf

check the white paper - https://www.victronenergy.com/support-and-downloads/whitepapers

pranil:


if you want more products to stock pls. check following which might come up in demand as the PV voltages and overall sizes go up

I have not found these in the Nigerian market and had to import them when needed

http://uk.farnell.com/eaton/dmm-125-4-i5-p-b/switch-disconnector-4pole-690vac/dp/2455608

http://files.sma.de/dl/26599/Sicherungssteckverb-TI-en-11.pdf

https://www.leadergroup-cn.com/product/solar-panel-mc4-connectors-with-10x38-in-line-fuse-holder

http://www.cnsandi.cn/sdp/911164/4/pd-4607850/11787512-2535588/Professional_Solar_Energy_PV_Combiner_Box_Solar_Ju.html

duwdu:


Also at source (I think) : https://www.mppsolar.com/v3/pip-gk-series/

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P34c3
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pranil:


The aliexpress is an official store for retail ( small order business) The inverter is made probably made in China but assembly and shipping is from Taiwan for Africa and from Germany for Europe.

duwdu:


I agree. I got my PCM60X to Lagos directly ....

Add: BTW, there was a follow-up on the initial YouTube video post on the 5048GK... The key thing I got out of the new video, (see link,) is that mppsolar has formally advised of a caveat emptor: to be mindful of possible early wear on components that may be caused by repeated yo-yoing of available solar power, occasioned by cloud covers. Seeing that, someone like me may end up waiting for the second or third generation of the 5048GK model.

https://www.youtube.com/watch?v=kQfJMRSTh8g

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P34c3
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