Easun ESB 3kW 24V - opinions and experiences of Off-Grid inverter users sought

kmarkot wrote:

I don't use it, but EASUN solar inverters have a PWM charger
Better look for something with MPPT
SANYU SPV18-3024 VPM
https://www.sklepfalowniki.pl/inwertery-fotowoltaiczne-spv18-3024vpm.html
or
Solar Inverter Off Grid Inverter with MPPT Green Cell Solar Charger 24VDC 230VAC 3000VA/3000W Pure Sine Wave
https://greencell.global/pl/inwertery-solarne...4vdc-230vac-3000va3000w-czysta-sinusoida.html

Hello
Where does this information that "EASUN has a PWM charger" come from?

zabrzepa wrote:

Where does this information that "EASUN has a PWM charger" come from?

Easun inverters come in two versions, MPPT and PWM.

prose wrote:

zabrzepa wrote:

Where does this information that "EASUN has a PWM charger" come from?

Easun inverters come in two versions, MPPT and PWM.

That's what I think, and I'm even convinced.

@zabrzepa I have the version with PWM charger.

@prose
I am testing the off grid version of the 24V ISolar SML II 3.5KW MPPT, without panels with Yuasa SWL2500TFR 12V 93Ah batteries.
In the future, I am thinking about six panels, e.g. JA SOLAR JAM60S20-390W, on the ground, arranged in a configuration of 2 pcs to the south and 2 pcs, -30" to the south.
But that's only for some time.

Hello. I will join the topic as a layman. And what are the arguments for a 24v installation and not a 12v one, as someone above wrote that unfortunately it is a 12-volt installation?

maniek777888 wrote:

What are the arguments for installing 24v and not 12v?

Higher voltage = lower current with the same system power and at the same time lower power losses and the cost of fittings. Therefore, high voltage transmission lines, not 230VAC, are used between consumers and power plants.

I'm thinking about making an emergency kit myself. That is, an uninterruptible power supply, e.g. sinus pro 2200 s (ew pro2500 and here already 24 v) panel 100 ah battery. My only concern is the costs - instead of buying 2 batteries for a 24v installation, it is better to use them to increase the number of ampere-hours.

The stored energy will be the same in both cases. Assuming perfect batteries: 12Vx200Ah=2400Wh=2.4kWh 24Vx100Ah=2400Wh=2.4kWh. It is healthier for batteries to discharge with a lower current. Additionally, the cables may have a smaller cross-section.

Has anyone figured out the differences between the Sml smx smg versions?

I am currently at the stage of installing an off-grid using a 3.6 kW EASun, the yellow one with a round black panel in the middle. I paid PLN 1,700 for it, plus 8x Long 440W and 18x 100Ah SSB. In a few days I will start it up, complete the cabling, and wait for the PV rack. The installation will have an energy meter at the input, before the inverter and after the inverter, so that I can see in black and white after the season how much electricity I managed to produce. I don't expect miracles, I live in a valley, and when I start with the sun it will be worse. If anyone is interested in it, maybe I will start a separate topic.
Coming back to the Chinese inverter. Obviously, this is cheaper equipment that offers quite a lot of programming possibilities. I have a one-year warranty on it - I bought it directly from the manufacturer, and I recommend this method of purchase, not through any intermediaries, fast shipping without any problems, you have the equipment at your home within a week at most. It is not a device equipped with a huge radiator, hence its operation at 80% control resembles a jet taking off. But here we replace the fans and eliminate a lot of the noise. Another issue are low-quality electrolytic capacitors - after the warranty period, you need to remove the motherboard and replace them all with much better quality ones to avoid a serious failure.

These inverters are at normal market prices, and other Fronius or Growar inverters are grossly overpriced...

andreee wrote:

Coming back to the Chinese inverter. Obviously, this is cheaper equipment that offers quite a lot of programming possibilities. I have a one-year warranty on it - I bought it directly from the manufacturer, and I recommend this method of purchase, not through any intermediaries, fast shipping without any problems, you have the equipment at your home within a week at most. It is not a device equipped with a huge radiator, hence its operation at 80% control resembles a jet taking off. But here we replace the fans and eliminate a lot of the noise. Another issue are low-quality electrolytic capacitors - after the warranty period, you need to remove the motherboard and replace them all with much better quality ones to avoid a serious failure.

And who gave you this guarantee? Manufacturer in China or distributor? Where exactly did you buy it? Believe me, with this warranty you only have 14 days when you can return it without giving a reason, after this period the Chinese will tell you to disassemble the inverter and take photos. If you get it right, you'll get a bag with damaged parts so you can replace them yourself, and if you get it wrong, they'll completely screw you over.

Added after 8 [minutes]:

Strumien swiadomosc... wrote:

These inverters are at normal market prices, and other Fronius or Growar inverters are grossly overpriced...

You can't compare it this way, it's like comparing a Fiat to a Mercedes, you can drive both, but will the drive be at the same level? I don't think so. However, there will be clients who will be interested in both.
Moreover, these are off-grid inverters, Fronius does not offer off-grid at all, and on-grid is a completely different sector of the PV market, they have something in common except that you connect PV modules to both and that is where the similarities end. Growatt is also a real quinol, but with a warranty from the distributor's service in Poland.

The price goes hand in hand with quality, access to service, technical support, etc. When I call the fronius hotline from my number. After clicking on the technical support section, I am immediately greeted by an engineer with the words "how can I help you, Mr. Paweł?" Try calling easuna.
In PV, as in every industry, there are users who are more and less demanding, with more and less wealthy wallets, some will choose the cheaper option and will be happy that they saved money, while others will choose the more expensive one because they want to have peace of mind with services, quality of service and, above all, the quality of the device .

I wrote clearly - I bought directly from the manufacturer in China, and I have a one-year written warranty from him. Complaints are not a problem at all, there is very good contact with the Chinese, usually if something is wrong you send back your inverter and you have a new one within two weeks.

andreee wrote:

I wrote clearly - I bought directly from the manufacturer in China, and I have a one-year written warranty from him. Complaints are not a problem at all, there is very good contact with the Chinese, usually if something is wrong you send back your inverter and within two weeks you will have a new one.

This is a guarantee, something like "your gentlemen's agreement" with the Chinese, have you already complained about something to him? You might as well light a stove with this piece of paper from the Chinese, it has no legal force. And you will have very good contact until the first complaint, and then the Chinese will write to you, Sorry my friend...

pawciu-85 wrote:

You might as well light the stove with this paper from the Chinese...

And you will have very good contact with your first complaint...

The Chinese can also be human .

rokbok wrote:

pawciu-85 wrote:

You might as well light the stove with this paper from the Chinese...

And you will have very good contact with your first complaint...

The Chinese can also be human .

I have no doubt that he can do it, he simply doesn't want to, because he found suckers in the EU who can sell the worst shit as long as it is half the price of the one on the domestic market and if so, not suffer any consequences related to the warranty, return to China, etc.

My friend has already bought about 180 of these inverters, there have been 3 complaints and no problems. You're also off topic. If you have such experiences that you make a fool of yourself by buying new equipment without a warranty, I am very sorry. What's more, I've been buying Chinese Besder cameras for pennies for about 8 years, and even more unbelievably, I have a 2-year written warranty on them, and during this long period of time I haven't had any problems with complaints being processed within a month.

Besder is a very good company, I bought hundreds of them... the price is x8 x10 lower than what is available in the EU in the same resolution and frame.

But this is a topic about inverters, not cameras, so let's focus on them.

andreee wrote:

I`m currently at the stage of installing an off-grid using a 3.6 kW EASun

On the MPP Solar website they claim that EASun are clones of their devices :)

https://www.mppsolar.com/v3/noaliexpress/

I was looking for an off-grid inverter capable of operating without a battery and I was surprised
that I can`t find anywhere (Ali, Amazon) the MPPSolars I read about
among others on the electrode that they have such functionality, until I found their store in Europe:

https://maximumsolar.online/new-eu-warehouse-page/

Well, I ordered something, I wonder how long I will have to wait.

Has the inverter arrived? Can you tell me more about it?

Let me know what you ordered and whether it has arrived yet?