craziness  what if we choose solar first and utility last....forr loads 

 

but then we contradict this when we choose utility as priority  charger 

we end up providing loads with utility ...if loads are heavy ...each time solar fail to sustain all loads  battery will bee invited when batttery drops utility will charge it

 

 

 

factory should make thier manuals comprehensive and cover how  loads priority acts with different charging options

 

also  i have question regarding 450voc     3k units  most of them  4500 watt solar 24vdc

 

while controller 100amp

 

but 100amp multplied in 24 is only 2400 watt     how can controller supports a wattage that if produced

will exceedi  its  rated current?

 

 

    

5 hours ago, wael_fathe said:

i have question regarding 450voc     3k units  most of them  4500 watt solar 24vdc while controller 100amp

but 100amp multplied by 24 is only 2400 watt     how can controller supports a wattage that if produced

will exceed its  rated current?

There is a bottleneck in the path from PV to battery in some models; it seems that they don't allow the DC-DC converter to run at full power in reverse; I have no idea why.

They can still use say 4500 W of PV power if some 2 kW of it goes to supporting the loads.

Hi all, new to this forum and its been very informative and helpful. Thank you.

I have a question on the settings of the charging programs. I have a client that has 2 x 5kw Axpert king inverters installed in parallel, with 3 x 5kw Akutech Lithium batteries installed. He has had the system running for around 4 years now and seems to have had a problem with the charging protocol of the system, it has recently become worse.

 

Program 1 is the output source and it is set on SBU.

Now my question is, does this play a role in the setting on program 16 for the charging and priority of the loads?

Client has had a problem now where the batteries get to its low level and then utility kicks in to take over the charging and loads at night, but it has happened now on two occasions that the utility does not kick in and the batteries run empty and the inverters shut down.

 

Any advise and help would be highly appreciated.

Hello,

I read all posts on this topic trying to understand how these inverters are really working and I am more confused than before to be honest.. it is my understanding that all these machines including the ANENJI-HHP-II-6.2KP-WIFI I am planning to buy are cut from the same die but, does anyone have any idea which reference (voltronics/axpert?) model this one really is based on (or is?)

And, really their manual is more confusing than explaining https://cdn-files.myshopline.com/file/store/1675916196960/ANJ-HHP-II-6-2KP-WIFI-user-manual.pdf

or I am really stupid but, I don't quite understand how it handles power sources.. can it mix grid with battery?

Some smaller batteries state they can deliver for example 50A or 100A continuously so, what happends if battery can deliver 50A but the load/inverter requires 100? will it drain the battery and drop its voltage really fast until it reaches the low level cutoff then turn to grid? or will it shut down if not connected to grid?

The desired function is to 1. use all available solar power either supplying the load or storing any excess to the battery and 2. be able to handle load up to the maximum power rating of the inverter (well, understandably not continuously - although I plan adding a second in parallel soon and they and the batteries will be inside a small inverter room with air conditioning and while the initial battery will be 5kWh I plan adding more 5kWh batteries every 2-3 months most likely until I reach a comfortable level or run out of money LOL). 

If I am not mistaken, this ANENJI is identical (?) to EASUN Isolar SMG II 6.2KP (and others from other "brands")

In the manual SOL setting states

So, it turns to grid when there is no solar power despite the battery is full? it says ANY ONE CONDITION but, I would understand it if it was both conditions!!!!

UTL on the other hand, I understand completely, its straight forward I think.. its a solar powered UPS.. you charge the battery with solar, and if grid fails solar if available and battery if full supply the loads instead.. simple...

SUB and SBU are a bit confusing.. 

On 2024/08/27 at 6:33 PM, burgduino said:

it is my understanding that all these machines including the ANENJI-HHP-II-6.2KP-WIFI I am planning to buy are cut from the same die

Some are rebranded Voltronics, others are cheap clones. The clones are of unknown quality.

On 2024/08/27 at 6:33 PM, burgduino said:

does anyone have any idea which reference (voltronics/axpert?) model this one really is based on (or is?)

My guess is that it is based on the Axpert VM II Premium model, though that is rated for 5.6 kW, not 6.2 kW. Sometimes Voltronic do make a special model for suitably paying customers (i.e. resellers), that has an extra 200 W of rated power. But this is an extra 600 W, just over 10%. My guess is that this is a cheap clone, and they inflate the rated power by 10% without making any changes to the design. The 6.2 kW of rated power may be a total lie, or they may have tweaked the stolen firmware to output the extra power, whether the hardware can safely handle it or not.

But Voltronic are known to be lazy about listing all their models on their web page, so there could be a legitimate 6.2 kW Voltronic model.

EASun are an interesting brand. Some of their products, especially the more recent ones, do seem to be legitimate rebranded Voltronic models, sometimes with custom metalwork. But EASun started off being a clone maker, so this might be old stock of a clone model, or it might be that EASun are still selling their clones (or work-alikes) in parallel with genuine Voltronic models. It's all such a mess.

On 2024/08/27 at 6:33 PM, burgduino said:

I don't quite understand how it handles power sources.. can it mix grid with battery?

Almost (?) all the genuine Axpert models with the high maximum PV voltage (450 or 500 V) have this ability, though probably only when the output source priority is set to SUB.

On 2024/08/27 at 6:33 PM, burgduino said:

Some smaller batteries state they can deliver for example 50A or 100A continuously so, what happens if battery can deliver 50A but the load/inverter requires 100? will it drain the battery and drop its voltage really fast until it reaches the low level cutoff then turn to grid? or will it shut down if not connected to grid?

It depends on the battery, and/or the battery's BMS (if any). Typically, the BMS will tolerate the overload for a few seconds, then use its internal MOSFETs to disconnect the battery from the inverter. How safe this is is unknown to me. Obviously, if the BMS disconnects, and the inverter has no other power source, then it will shut down and drop all loads. Some models can in some circumstances operate with solar input and no battery or AC-in.

On 2024/08/27 at 6:33 PM, burgduino said:

If I am not mistaken, this ANENJI is identical (?) to EASUN Isolar SMG II 6.2KP (and others from other "brands")

They could indeed be made in the same factory. Whether that is the Voltronic factory or not isn't clear. A photo of the sticker on the side could help determine if it's a clone, but of course you usually don't get that before you buy.

On 2024/08/27 at 6:41 PM, burgduino said:

So, it turns to grid when there is no solar power despite the battery is full?

Yes, the SOL output source priority is for keeping the battery ready for load shedding or the like. At sunset, the grid powers the loads, if present. People are often tempted to use it, because at first glance it seems to imply "use solar as much as possible".

UTI is really for if you are running from a generator. In that case, you want to use the utility (really the generator) any time it's present, since it wastes petrol to lightly load the generator. Or if the solar and battery is there literally only as a backup.

In normal household use, you would use SUB for blending, or SBU if you wanted to make use of stored battery energy.

 

3 hours ago, Coulomb said:

Some are rebranded Voltronics, others are cheap clones. The clones are of unknown quality.

My guess is that it is based on the Axpert VM II Premium model, though that is rated for 5.6 kW, not 6.2 kW. Sometimes Voltronic do make a special model for suitably paying customers (i.e. resellers), that has an extra 200 W of rated power. But this is an extra 600 W, just over 10%. My guess is that this is a cheap clone, and they inflate the rated power by 10% without making any changes to the design. The 6.2 kW of rated power may be a total lie, or they may have tweaked the stolen firmware to output the extra power, whether the hardware can safely handle it or not.

But Voltronic are known to be lazy about listing all their models on their web page, so there could be a legitimate 6.2 kW Voltronic model.

EASun are an interesting brand. Some of their products, especially the more recent ones, do seem to be legitimate rebranded Voltronic models, sometimes with custom metalwork. But EASun started off being a clone maker, so this might be old stock of a clone model, or it might be that EASun are still selling their clones (or work-alikes) in parallel with genuine Voltronic models. It's all such a mess.

Regarding their power rating I plan getting 2 of them to use in parallel so I never need to really exceed perhaps 75% of what they claim they can deliver  I have seen several of these naked too and I have the impression that they are not too difficult or costly to "upgrade" in a sense replacing all their electroletic capacitors with "good" ones and all the mosfet & IGBT with better variants aiming for lower losses, a bit better thermal performance and hopefully longer life-span... someone with more in depth knowledge of their schematic might even be able to improve them further perhaps in order to reduce their "idle power consumption".. I don't really know I'd like to take that path that is for sure  I might get my hands on a broken older model which needs to be fixed anyway and I might have some fun trying to repair it and if I manage to make it work go for an "upgrade" of shorts to see how it improves if it improves in the first place that is LOL

 

3 hours ago, Coulomb said:

Almost (?) all the genuine Axpert models with the high maximum PV voltage (450 or 500 V) have this ability, though probably only when the output source priority is set to SUB.

I am still a mess trying to understand SUB/SBU to the detail  I think though running the inverter in SBU is the way to go for me.. Solar, battery and utility as last resort.. The model I'm looking for claims battery-less operation which makes things even more complicated.. I will get two inverters and later a 3rd one .. of the first two, one is for me and will power half the house (part with less demanding but constant loads aprox 400-3000W) and the second will go to a cousin who might need to operate for a few months without a battery until he gets his from China... when I get the 3rd one, I plan paralleling them and feeding power to all the house which will run at a steady load between 600-4000W and up to 6000-8000W when ie cooking or ironing etc. 

So to me at least its not clear what to expect from this running without a battery in SUB mode... I hope it will use all solar power available to it to feed power to the house and when load demand exceeds solar production it will mix with grid power.. in which case I also hope it will not backfeed... but I seriously doubt that that's even possible (to not backfeed) and I would then hope SBU does the trick even without the battery.. if I get it right it will use all solar power to power the loads and since battery is missing instead of going to use battery power and solar it will go to grid power but I suspect grid power alone.... 

I would really love it if someone who has one of these and has tried all the option took the time to share his knowledge and experience with the the world

 

3 hours ago, Coulomb said:

It depends on the battery, and/or the battery's BMS (if any). Typically, the BMS will tolerate the overload for a few seconds, then use its internal MOSFETs to disconnect the battery from the inverter. How safe this is is unknown to me. Obviously, if the BMS disconnects, and the inverter has no other power source, then it will shut down and drop all loads. Some models can in some circumstances operate with solar input and no battery or AC-in.

I'm expecting a 2.5kWh rack battery first which will be upgraded over time with more 2.5 & 5kWh packs but, in the beggining when alone it can only deliver constant 2,5kW/50A If I'm careful it will not be a problem until I get the second inverter and by then hopefully at least 2-3 more batteries to cope with the loads

3 hours ago, Coulomb said:

They could indeed be made in the same factory. Whether that is the Voltronic factory or not isn't clear. A photo of the sticker on the side could help determine if it's a clone, but of course you usually don't get that before you buy.

Yes, the SOL output source priority is for keeping the battery ready for load shedding or the like. At sunset, the grid powers the loads, if present. People are often tempted to use it, because at first glance it seems to imply "use solar as much as possible".

UTI is really for if you are running from a generator. In that case, you want to use the utility (really the generator) any time it's present, since it wastes petrol to lightly load the generator. Or if the solar and battery is there literally only as a backup.

In normal household use, you would use SUB for blending, or SBU if you wanted to make use of stored battery energy.

 

I really thing SBU is the way to go.. until I install additional solar panels and battery capacity for lets say a year or so my system will be sub-optimal and my goal would be to run on solar, when possible, drain the battery then go to grid .. if there's still solar power but its not enough for the loads, I understand it will simply use solar power to recharge the battery until it exceeds "re-connect" threshold so, I think I am not loosing solar power .. in the scenario of lets say having a weeks bad weather with just say couple of hours with adequate solar power I expect this to run the house on grid power while recharging the battery.. once the battery is over the threshold it will go back to using battery power and solar if available and I am happy if that's the case.. 

 

4 hours ago, Coulomb said:

Some are rebranded Voltronics, others are cheap clones. The clones are of unknown quality.

A cross reference catalogue would be very handy LOL

There are at least 5-6 brands I know that look like twins

Anern,Anenji, Daxtromn, MPP Solar, Easun to name just a few.. unfortunately you can only guess by the model name each vendor uses, the datasheet and manual and comparing seemingly similar models is tough as well.. 

Is there any of the extented family members that is available in the EU that one could really recommend??

I need an inverter I can parallel to reach at least a dependable 8-9kW power range and has 450-500V mppt that will not break the bank ..

19 hours ago, burgduino said:

I have seen several of these naked too and I have the impression that they are not too difficult or costly to "upgrade" in a sense replacing all their electrolytic capacitors with "good" ones and all the mosfet & IGBT with better variants aiming for lower losses, a bit better thermal performance and hopefully longer life-span...

My colleague Weber has written a post on selecting the best capacitors etc here. Though that was a long time ago, for a genuine Voltronic model that is no longer available, and the MOSFETs were not selected for lowest loss. He did attempt to rewind the main inductor with litz wire, but the improvement was slight, and not worth the considerable effort.

18 hours ago, burgduino said:

Anern,Anenji, Daxtromn, MPP Solar, Easun to name just a few..

I've never heard of the first three. MPPSolar is a genuine brand; I run two in parallel myself. NOTE: MPPT Solar is a clone brand!

Edited August 29, 20241 yr by Coulomb

I am now talking with FCHAO they have a 6.2kW inverter which does not look anything like the voltronics clones and impressively has embedded MCB/RCD/DC Isolation/Surge protection and solar panel fuses etc.. looks very neat and is not expensive for all the extra hardware but unfortunately cannot be paralleled.. to my surprise the manual LCD icons etc appear to be similar to voltronics spin-offs so, its very confusing.. they have a descent product record according to my limited internet search for comments etc and I'd love to try the inverter but unless my cousin gets interested I don't see this happening anytime soon

I wouldn't go that deep messing with an inverter as rewinding coils but I am expecting an older model with damage to repair and if I succeed doing that I might as well change mosfet/igbt & capacitors just for the fun of it and to satisfy my curiocity

I have never stepped on MPPT Solar and I would never take it as a brand name as there are many solar chargers without any branding that say "MPPT SOLAR" on them!!! is it a brand or a description LOL

What makes me sceptical though is that you say MPP Solar is a genuince brand.. I get it that they are offering a better quality product and have notices lots of positive word out there but, to the best of my understanding they use the voltronics lineup of inverters no? perhaps better made and supported but they are still selling a better version of the same product no? At least I have not seen anything they make that could potentially be their own in house developed product.