Huawei SUN2000-KTL-MO inverter. What energy storage will be the best.

gamemaniak wrote:

Hello,
I'll connect too. Generally, in order for the Huawei inverter to work with batteries, it must be a LUNA control module that has RS485 communication with the inverter. Only such a connection will ensure the possibility of mixed or complete off-grid operation. However, I have an idea to connect the Luna control module to the inverter for about PLN 5,000, but the batteries should be installed, for example, from a used electric car. What do you think about this solution?

This is exactly what I thought.
I wonder if the batteries are also not communicating with the LUNA module.
Does anyone have information on this?

gamemaniak wrote:

Hello,
I'll connect too. Generally, in order for the Huawei inverter to work with batteries, it must be a LUNA control module that has RS485 communication with the inverter. Only such a connection will ensure the possibility of mixed or complete off-grid operation. However, I have an idea to connect the Luna control module to the inverter for about PLN 5,000, but the batteries should be installed, for example, from a used electric car. What do you think about this solution?

Well, only question no. 1 how to connect it without a loop diagram and secondly, I would prefer, for example, LTO cells that are much more lifetime but unfortunately have a lower voltage than ordinary LI-ONs and this can also be a problem because in this luna probably there is a balancer for LI-ONs ...

Added after 15 [minutes]:

groku wrote:

gamemaniak wrote:

Hello,
I'll connect too. Generally, in order for the Huawei inverter to work with batteries, it must be a LUNA control module that has RS485 communication with the inverter. Only such a connection will ensure the possibility of mixed or complete off-grid operation. However, I have an idea to connect the Luna control module to the inverter for about PLN 5,000, but the batteries should be installed, for example, from a used electric car. What do you think about this solution?

That's exactly what I thought of.
I wonder if the batteries are also not communicating with the LUNA module.
Does anyone have information on this?

I am also wondering about that ...

First time on the forum, hello everyone!
I have a SUN2000-4KTL-M0 and recently bought a 1500W UPS and three 100Ah gel tubes each. The easiest way to do some kind of back-up - with full batteries, the refrigerator and freezer work for 2 days. It is known that such a typical off-grid does not have so much sun in the country of blooming linden trees, but for example, for power outages for a few hours a day, it makes sense.
The question is different; this inverter I have is hybrid (as far as I know) and in the absence of electricity in the network, you can set it to off-grid in the installer settings (by directly logging into the inverter), where it will be powered from the panels. Does anyone know where it is set in the options?

You need a so-called Backup Box. Such a box for 5k PLN that will allow you to disconnect the circuits and connect two pins in the socket . You could probably do it yourself on a few contactors. Then you have the option of using one phase, probably max 3.3 kW. Here are the drawings: https://support.huawei.com/enterprise/en/doc/EDOC1100179565
I learned from Huawei M0 inverters are also supported.

Oh, such shoes ... Thanks for the explanation!
So the SUN2000 itself does not have this capability. And how is it then configured in the app? Can I do it myself without the help of an installer?

e I don't know if it's for huawei SYN2000.
https://pl.aliexpress.com/item/10050038850374...035%2C41%PLN20%215%C2%A0421%2C23%PLN20%21%21% 21%21%21%40212a7e9916685106475671001da7a1%2112000028546957085%21edm&edm_click_module=alg_product_3_4586567300&creative_img_ind=11&tracelog=rowan&rowan_id1=aeug_edm_41180_1_pl_PL_2022-11-30&rowan_msg_id=lighCOWS_41180_%24a6407013ca814e628014db5d19479916&ck=in_edm_other&gatewayAdapt=glo2pol

And does anyone know or can take a picture of what is inside this huawei backup box? It costs a lot, but you can do it yourself much cheaper.

maciacho wrote:

Does anyone know or can take a photo of what`s inside this Huawei backup box? It costs a lot, but you can do it yourself much cheaper.

The Box itself is primitively built, it works similarly to the SZR in the network generator system, but additionally has an RS485 communication module through which it is activated. I believe that the price of the module does not exceed PLN 100. I asked the distributor about the chances of getting this module because it is assembled on site. But unfortunately there is no chance. Good money on it now so they won`t make it available.

https://www.solar4ever.com.au/HuaweiInverterReview.php

https://solar-distribution.baywa-re.pl/out/me..._Box_B0_B1_skrocona_instrukcja_obslugi_01.pdf

After a thorough analysis, HUAEI itself issues information about operating as off-grid and thus disconnecting from the mains power supply, which is required.

I'm raising the topic, has anyone managed to connect anything other than LUNA to the Huawei inverter?

Hello, also like firepunch I would like to know if there is any way to connect an energy storage other than luna to the Huawei.

The storage would have to be high-voltage and, in addition, communicate with the Huawei inverter - it would probably cost so much that it would be cheaper to buy a second hybrid inverter that would serve our energy storage.
Huawei didn`t complicate the matter so much so that someone could steal its profits - there are not enough cells inside the Luna 2000 to provide 600V, there is only a regular 50V battery wheel and an additional converter.
https://www.youtube.com/watch?v=GXxRz4I-MMs

I dig the topic I have a Sun 2000 inverter and a Luna 5kW storage and so I wonder if anyone has tried to add/combine a self built storage with 16 3.2v batteries which will give us about 15kW, we order from china cost about 3200 with bms and not 9 thou for another module only is it feasible?
I found a video of a guy taking such a battery module apart: .
At the moment I would buy a new inverter and build storage, maybe some additional off grid re-wiring and connecting the most current-hungry appliances to 1 phase. The current set-up cost a lot of money, I'm still on the old rules where I donate energy to Tauron, but when they send me a forecast and I have to pay 2 thousand a year extra, I try to be self-sufficient. However, having a sauna (6kW cooker), boiler, induction etc., I do consume a bit, so it suits me to have large storage built cheaply rather than overpaying for nice boxes.