Tshegofatso

Finally someone noticed......😂😂
I was getting worried about all this negativity going on, as if I did something wrong in warning everyone. 🤭
Just to clear things up for everyone out there. I do not buy or sell stolen batteries. 
All my batteries are brand new, not ex-MTN ! 
So if possible please change your reactions to something positive. 🙏🏻
 
Thank you 
Solaris 😁

I changed mine to a Thanks. Summoning @DeepBass9 to remove the last sad facey.

I am on 1.8 units a day of their power.

so currently it make no sense to buy another battery for me.
I don't want to feed back.
I am already paying R200 service fee. I get 62.5 units for the balance of the R400 I am forced to pay so that leaves me with extra units left over every month.
I can also see i make a lot less power in Sumer vs winter because of the afternoon thundershowrs.

So if they leave me as is I am happy.

but force me to register and all off the sudden I need to pay R1365 a month service fee....

then I would rather buy another Batt and disconnect.

I still have my trusty 6.5kw Generator from my pre solar loadshedding days that can help in a pinch....
 
 

We must always account for temperature rise when considering the power equation for electronic equipment. Excessive over-paneling or oversizing—such that the MPPT spends five hours a day at its current limit (clipping)—will inevitably impact the overall lifespan of components within the inverter.
Temperature rise is the most significant factor affecting component longevity. In electronic product design, we should adhere to this fundamental principle:
For every 10°C increase in temperature, average reliability decreases by 50%.
The same principle applies when evaluating the charge current of LFP batteries—or any battery. If a cell is rated at 1C, consistently charging it at 1C will reduce its lifespan, as the increased internal temperature will have a far greater impact than calendar aging.
 
 

One can add larger panels rated at higher amps but there will big losses. So yes it will work but the panel will never reach its rated wattage quite simply because the MPPT is not designed for such a panel. 
In the early days of Grid tie inverters they had the same issues with their 11A rated strings into the MPPT. That is one of the reasons the Solis S6 is such a good prospect for the residential market. However, one must note it's the latest addition and new comer so it definitely has to have better technology. If we had a new generation Deye 5kW it would no doubt have the wider voltage band and current specs. 
I don't see Deye or Sunsynk spending money for that it makes no sense. There are bigger fish to fry...

I guess any engineered product will have a margin of safety designed in over and above the rated performance. In the case of an inverter's MPPT I'd look to the Imp rating first, which is what the IGBT's will be setting/controlling the max draw at normally - say 13A for the Deye. Next there's the Isc rating, and that's the fault current that you'd expect the device to be able to handle without being permanently damaged - 17A. And over and above that there should be an ultimate current limit at which the device will overheat and maybe burn out. What that is? 20A or 25A? No idea.
But I'm not convinced that a 545W panel with say 13.2A Imp, 13.9A Isc or thereabouts, which operates at below that current most of the time, and only really sees 13A around noon in summer, is excessively overloading a 5kW Deye. Not a fan of the idea of putting 17A panels on it though. Maybe some folks out there with this 550W panels can comment on their experiences.

What some people don't realize (know) is that most (if not all) of the inverters MPPT's design has a safety factor of x% on top of the allowed Amps.
i.e max input is 20A, but the design max is maybe 28A.
That's why Sunsynk as an example can up/down the max. by simply altering the Firmware.

Hear that? That's the sound of a penny dropping.
Thanks Steve for explaining the blindingly obvious.

I think @Steve87 is, at least in part, defending the smaller companies. I have seen a few articles in local papers that seem to be saying "deal with the big companies. They have the expertise." I don't think it is beyond the realms of possibility that there may be collusion to plant such stories, or that the journalist writing the report has phoned some big company - they're easier to find - and asked one of their managers for some input. And so that manager is quick to point out that you shouldn't deal with those small businesses because you don't know what they don't know. And since the name of his company has already been mentioned ("We asked the chief technical officer of SuperSolarBob...") this helps his business in particular and big companies in general. 

But it is not the case that a smaller company doesn't have standards and expertise. Anybody who has dealt with Steve will know that he has both, that's why he's one of the highest ranked and most appreciated contributors to this forum.

@Steve87
You driving a single or double cab?😜
Roofrack or canopy?🤣

Hi hope I don't qualify as a "bakkie-brigader" however, I think this article may have a good intention but the explanation is a bit inaccurate. 
I have seen this arguement being had a lot and once again it's a little lack of what is the actual risk. What is risky here ? The MPPTs are a DC driven device. It extracts power by the product of Voltage and Amps. What is the limitation to observe the Volts or the amps and what happens to either if you exceed them??
The MPPT will have a 500V max voltage for example. If you go and connect enough panels in series like 10 in series at 52V per panel (520V) you will exceed the raw voltage input & the MPPT can be damaged.
Let's say there is a amperage total expressed as 11A on the MPPT. What happens if I use a 550W JA Mono panel rated at 52V per panel Voc and Imp at 14A. What will happen to a string length of 8 panels??
A lot of ppl and probably the author of that article believes that we ok in the Voltage range because 52V x 8panels = 416V total. So voltage is GOOD. What about the current? They believe the MPPt will blow and get damaged because the panels at Max power current will deliver 14A and fry the MPPT. This is grossly incorrect!! The MPPT will drink 11A from the panels because that's all it needs. It won't kill itself trying to get drunk. 
If someone including this author feels anything differently let's try to compare logic if not science. You have a 5kWh or 100ah battery attached to this same inverter. It's rated battery max input current draw is 100A. If I attached another 5kWh (100ah) battery to this is parallel what will happen?? Everyone knows the inverter doesn't blow up. However if you connect them in series to get 100V you have a problem and will damage the inverter. 
Some ppl mock the humble Bakkie Brigader, however, there are some basic fundamentals that need to be understood before we point fingers. 
Now we can argue further that there will be losses with the 550W panel because it will never reach full rated power and I agree with that. The 460W panel is a better fit because it has 11A Imp rating. But let's just say the message to pass on is that poorly integrated equipment can cause damage and losses in production but the fear mongering of ppl saying the amps will damage the MPPTs is just a camp fire story. 
Sorry to be a pain but even an electrical engineer at a Multi million rand project wanted me to connect an Atess inverter at 1100V. The max MPPT voltage is 1000V and the MPPT range is 450V to 800V. I was carrying out the commissioning & I refused. So the moral of this story is that Solar is a relatively new technology and a lot of operators/ installers/ electrical engineers/ Bakkie Brigaders and plumbers know what they are doing and a lot don't know. I couldn't care less the title of the person, we don't all know the same things neither do we have the same experience levels.

I'm confused. I thought the MPPTs only drew as much as they needed. 
Or as it that they draw as many WATTS as they need, but the current could still be too high? Which is why it is necessary to pay attention to serial & parallel connectiond between panels.
Cheap connectors I understand. 

Good day forum members,
This articles hits the nail square on the head as i have seen many mismatched solar arrays to mppt's power ratios causing damage to the inverters. Also cheap non standard( not Staubli) mc4 connectors causing hotspots at terminations. The cracks are showing where non compliant installations was done during peak load shedding season. My advice, should you have any doubts to the standard of your installation get i checked out by competent solar operators/master electricians.
https://www.suidkaapforum.com/News/Article/Property/mismatched-solar-components-costing-sa-homeowners-thousands-202502040946

I'm very focused on efficiency for my solar system, and I'm wondering how the Lumo batteries perform when it comes to charging and discharging with these inverters. Are there noticeable differences in efficiency between Deye, Polytech, and FoxESS when paired with Lumo batteries?

Howdy
I notice you have some V.S.O.P lubricating liquid to cool the bms, that should do it.😇

Thank you for the feedback
 

Eco-flow, Bluetti and the like are quite expensive, and really designed for providing a limited amount of power whilst you are camping. There are cheaper options. There are also specialist stores. 
You don't say where you live. If you are in Gauteng, and especially if you live in the north of Jo'burg, Midrand, Sandton or even Centurion, you may want to pay a visit to Maiden Electronics. UPSs are their game, and they have a lot of experience (and they can service what they sell).

Good day. I am looking to install an inverter and panels into my caravan. I have enough space on the roof for 3x large panels (+-500w panels). Ive been looking at victron for their modular type system but it is quite pricey. I have also been looking at UPS/power stations as an alternative just for like 2 lights, a fridge, tv and a router. I found this one UPS that has connectors that work with the normal panels with the mc4 connectors. Its called Lumo Powerall, it can handle about 1500w of solar and has a decent bypass feature. Im just curious can you connect these types of systems to an alternator as well?

That really depends on the inverter.
If the inverter wants RS485 as BMS input, you can skip the LV-HUB in the last step. That's the case for Axperts, for example.
If the inverter wants CAN BUS as BMS input, you need to supply CAN. That's the case of Victron, etc.
On top of it, there another catch: with the RS485 the inverter firmware has to support not just the BMS protocol itself, but also a total number of piles and Pylontech batteries connected. AFAIK, some inverters with RS485 BMS IO support just 2 piles of the batteries. Not being able to address more.
With CAN the number of batteries and piles does not matter. Once the inverter supports CAN for BMS, you can connect all the batteries and piles you have.
 

Just a note for the curious:
Ports A/CAN and B/RS485 on the US3000C are having both protocols in each port. So the A is technically CAN+RS485, B is CAN+RS485 too. Daisy chaining of multiple "piles" together runs over RS485 protocol, the conversion to CAN protocol is done by the LV-HUB in the last step. Daisy chaining of individual bricks within a single pile uses RS485 protocol too, but this time via LinkPort0 and 1 ports.  

 

For a shame no.
The longest daisy chain in your case would look like this:
CAN 1. US3000C 2. US3000 3. US3000 4. US3000 5. US3000 6. US3000 7. US3000 8. US3000 9. US3000C 10. US3000C No LV-HUB needed for the above. Not possible to utilize 11th US3000 battery. FW update required.
 
To be honest, the above would be the preferred way for me, in order to keep things as simple as possible. I would test it first, then sell the 11th US3000 and buy US3000C instead. Then, the max daisy chain would be up to 16 bricks.
The other way is to use LV-HUB, just like your original idea. The only comment is that the groups are to be chained via connecting A/CAN to B/RS485. Not A to A or LinkPort0 to B.
 
https://www.ostrovni-elektrarny.cz/docs/us3000c-manual-eng.pdf (see PAGE 23 - Multi Grouping)
 

 
 
 

Hello there. I am a bit confused, I have been doing some research on some products and installation guidelines. I noticed that the requirements for a COC to be approved is that it needs a PE-N (earth, neutral connection) for the inverter to get rid of unwanted voltage on the earth. I myself have a Luxpower 8kW inverter and 1 Lumo 5.12kW battery. But I dont see this PE-N connection in my system, but I have a COC? I also saw that some inverters have a 'Neutral earth relay' built in. Is this why I dont have a separate earth neutral connection in my system?

Hi, I need some help. I have 3 Lumo 5kwH batteries connected and a Deye 5kW inverter. I wanted to ask, for the CT connection which direction must the arrow face? Towards the inverter or towards the grid supply? Also where is the correct place to connect it? Before the main incoming breaker or after the breaker supplying AC to the inverter?

Sunsynk or Deye, because there are lot of them in the field, so they are known and there are lots of installers/repair guys that are comfortable with them.

They are really the same thing, just with differences to the user interface.

Each will work as hybrid or grid-tied, though as I understand the term "grid-tied" and since you have batteries, I am wondering why you are contemplating that mode. Anyway, in either case you will be able to switch between those two modes of operation. 

Just make sure that the inverter you decide on is able to communicate with the batteries you already have.

You have 15kWh of battery, so get an 8kW inverter if you can stretch the budget that far. Most of the time you won't even be using 5kW, but 8kW gives you extra headroom, and that comes in handy when multiple appliances are in use at the same time.

I would look to add a Transformer based Inverter for this application. I have worked in the C&I market & have seen on one particular site with a very large walk in Cold room that compressor generate high surge cold start currents. The Gate & Drive Sunsynks & Deyes have their place in the market & that's usually when there is no heavy inductive loads, however, when you start playing with factory or industrial equipment like compressors & motors the application needs to be specified accordingly. Otherwise you run the risk of your solution not working. 
I would recommend equipment like the ATESS HPS range or Megarevo MPS range depending on your power requirement. They are High Voltage machines & are built for industrial applications with in built isolation transformers.
However, I would first start with a power investigation with a Logger or meter to find out your power peaks & requirements followed by matching the inverter output current to at the very least to match your Grid input breaker. These projects often cost a lot of money, so due diligence must be followed with planning, selection of equipment, installation execution as well as plant management (operations & maintenance).