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Hi, Also interested to find out if there is any protocol to be used with HA or Solar Assistant. But the lack of threads on them, and seeing you struggling with support is making me second guess if i should purchase. How has your experience been with the batteries so far?

Hi Guys, I Have a older RCT Axpert MKS 5k 0.8PF and we need to upgrade our old AGM batteries. At the moment with all the shortage, It seems my only option at the moment is either the Weco 5.3k or the sunsynk 5.12kw LFP batteries. Now the Datasheet for the Weco looks really good, but cant to find much information or support for their batteries as to which inverters are communicating with it. I Will have to upgrade the firmware on the inverter. and not sure if that will give me the weco option for battery selection under option 5. or if the Weco batteries will communicate with Solar assistant? If anyone has had any experience with them? Otherwise will the sunsynk Battery communicate with the axpert or soalr assistant? Thanks

If i have a look at the latest spec sheets and the wiring diagram again & i presume the generations are quite similar. I do see it now says a element rating current of 14A. Max size 3KW. (Didnt click earlier) Looking at the wiring diagram it does seem the Water heater connection and neutral are linking back the the Heat pumps AC in. So I think the Unit does support the amperage of the element and the heat pump. I Gather my cable size then is going to have to support the 14A + 2.7A from the rated heat pump. https://www.enerflow.co.za/images/Specsheets_Rev1/rhp_specsheet_digital_rev1.pdf

Ok, Thanks for the reply, If i gather correctly, you just using the PCB to operate the relay for geyser element? I Think this is slightly different as i only see 2 ports for the geyser(Top left of diagram) saying Neutral and HT (To Electric Heater) I presume under that method of yours there would be a 3rd data signal cable for the relay?

Hi, I've bought a 2nd hand Enerflow air/water heat pump, unfortunately the whole casing has been painted, so i cannot verify any sort of specifications or model, but it does seem to be a enerflow ERHPSU08E-MS 3kw from what i have narrowed down. as for the generation i'm not sure. But they don't seem to offer much information as to wiring and plumbing diagrams on their manuals, which is a bit frustrating I Have only found this Diagram on the back of some casing below which is for more the internal components Anyway the model offers the option to link your geyser element to the heat pump for extra heating/failure ect.. Now i'm trying to figure out, does my thermostat now wire from Geyser -> Heatpump -> DB Board. and would the heat pump be able to handle a large element? Or would you bridge into the thermostat from the heat pump, leaving the geyser original wiring from DB board? Thanks

Hi We have a RCT Axpert.5k (5000va/4000w) 48V that we would like to add some panels on. We have 4 JAsolar 540W which will be east west facing 2 east and 2 west with north inclination. I have a spare inverter that can be installed parallel. so wondering if its best to run 2S to 2 inverters. or to run 2S2P to the one installed inverter. I have provided 2 Drawings of each circuit if anyone can tell me assist me with which method would give better results. and if my calculations are correct for fuses and breakers. The specs of the solar side on the inverter are Rated - 60A Max Voc 145V Min Solar Voltage 40V The panels JA Solar JAM72S30 540/MR/1500V VOC 49.60V LSC 13.86A lmp 13.65A VMp 41.64V I do know that it is not necessary for the Fuses but would prefer to have them in any case, And run a bit higher on the voltage and allowable Amps of the circuit breakers. I Will also be adding a surge arrestor once i know im on the right track. I used a power factor of 1.56 for the sizes for fuses and breakers. Any advice would be greatly appreciated.

Hi. I was hoping could maybe get some advice with sizing wiring, Fuses and Breakers, Or If my thinking is correct. We currently have a RCT Axpert 5k 5Kva/4KW MKS, with 4 x 12V 100AH batteries in series as backup solution (We also have the same spare inverter which is not installed currently, with parallel communication.) (https://www.comx-computers.co.za/RCT-AXPERT-5K-specifications-91891.htm) We have got 4 x JA Solar 540W panels that we wanting to put on the system. (https://www.jasolar.com.cn/uploadfile/2021/0706/20210706053524693.pdf) The 4 panels i plan to connect 2s as they installed east/west configuration with 15Deg slope either side(30Deg Combined) and inclined north at 10Deg. So i have the option 1) of either putting the strings in parallel to the one installed inverter which can handle 3000W Array with a MAX Voc of 145VDC and 60A max charge. My concern would be of how much voltage drop their will be with the panels difference of 30Deg over another mppt options 2) Would be installing the second inverter and running each string to each inverter. (We do plan to add some more panels soon) If i went with the 2nd inverter option and the panels in series, i know i wouldn't really need any fuses/combination box as yet. and just a breaker/solar DC If the first option wouldn't result in much loss. can we confirm my calculations for a 2s2p or more array. The panels have a Voc of 49.60V with a lsc of 13.79A lmp of 12.97A & The Max Fuse Rating is 25A So if we were running 2s2P or the short Circuit current would be 27.58V and higher than the Max fuse rating. Would Each string then require a 25A fuse as per the max fuse rating (i presume a factor of 1.56). Then as D/C-Over current protection. the breaker for 2 combined strings of 12.97A x 2 x 1.56 is 40.4A so move up to a 45-50A DC Breaker? ( or x3 for 3 strings, x4 for 4) And then with the array being 10m away from the inverter with Voltage drop. Cable would need to be minimum of 16mm2 for 99A max and up to 1% loss for 2 strings with 99V at 27A If anyone can confirm my thinking and calculations would be correct. It would be a huge help. Thanks.

Hi, Ive been doing some thinking about DIY wind turbines. Wondering if someone more knowledgeable in the area could answer some questions for me. When a Wind Turbine is say rated for 12V. does it provide a higher Voltage to charge a 12V battery ie. 13-14V? I Presume The Voltage changes and Rises with the turbines RPM's, So would they use a higher voltage generator like 24-36V to produce enough power at lower rpms and regulate the Voltage output at higher speeds? Thanks

I did see that docker version but i never tried it myself. Did the data show up as a entity in overview or through the energy section on HA? I had it running on a ESP8266 and was just pulling the data as a entity in overview. it was pretty quick responsive wise and would refresh every second or so. I did not use it for any sending or changing of input/output settings on the inverter, but with the 8266 you are limited to how many invertor "sensors" you can use before running into issues.. At the moment i dont have it connected it up as I've changed to a esp32 board thats also running my solar geyser and pool pump and in still of the process of connecting it up again. so once everything is up and running on the ESP32 ill do some more testing.

Thanks for the advice, It is a used unit from a friend that changed system. so its a 15 tube system, with 10 used tubes(with vacuum) and 20 new tubes in boxes. He managed to contact the people who installed it, they said that it would run fine at 400Kpa as long as the heat pipes are used in the excavated tubes instead of running your water through the tubes which would do on a low pressure geyser where the tubes fit into the geyser above it. He says the header manifold should be able to handle 600kpa. So im hoping that is correct.

Hi, Can anyone advise if its possible to use Low pressure Solar collector tubes to a 400Kpa High Pressure Geyser. i'm not sure on the pressure of the header system, i presume it would be the same as the tubes rating. The geyser does have a extra port for renewable input. I would like to have it installed above the geyser in the roof with a small solar pump. Would the High pressure cause issues? if so is it possible to install pressure regulators on the feed pipes too and from the collector to reduce the pressure? Thanks

Yes, you do not want to be using the power pin from the axpert RS232, unless you using some sort of buck converter which i wouldn't recommend doing, unless you know whats going on. Sorry i Also Forgot about the nodes limitations on hosting a USB to UART.. This is not Implemented in the ESP32, But has been mention of it possibly in futureversions. From my side the RS232 is perfect and via node gives me the outputs i need to pass via HA with out the extra added cost of a pi. But yes, IF you do not know what you doing, i'd rather suggest sticking to a easier solution. Otherwise reading up on all the threads and documentation

Thank you. I'm leading more and more towards that Bluenova DU... Just now to try find out if it is compatible with the inverter communication wise. I did read some people had issues with Bluenova and the axperts, With What seemed to be inverter kicking off at 97-98%% charge. Is anyone more familiar with this and if there is a fix or what their experiences are with the bluenova rac power DU on the rct axpert 5k? Thanks again

Thank you for that. Is anyone able to explain the difference in cycle usage? between the Hubble and Blue Nova. I see the DU Unit says 7000 cycles @80%DOD compared to the hubble showing 3000 cycles to 80% retention. How would that stack up against each other? Have got a decent price for the DU one, So its come into the picture now. Only thing that is still worrying me, Is the capability of communication with CAN Bus from the AXPERT 5k 5kva/4kw to these LiFePo4. It has the RJ45(RS232) port and gather i would need to upgrade the firmware to 73.00e

Can anyone advise, About Using Hubble, Blue nova or PylonTech on the Axpert 5k 5kva/4kw? Looking at prices between the pylontech, Hubble, Blue Nova BP there is not much a price difference between them. Obviously the pylontech's have a proven name but must say i am bit concerned with the 0.5C discharge and the images i saw of the workmanship on another thread. The Hubble looks decent specs as well, Especially with the 1C Discharge, But bit worried as there does not seem to be as much infortmation in reagrds to cycles and curves . The Blue nova is appealing as well , seems to have a wider voltage range. and also has the 1C discharge, but think with 40V cutoff, I would lose some of the storage capacity. However, Can the BP unit be used as daily cycle with solar? or would you need the DU unit, As that drastically increases the price? In Regards to Communication with the Inverter. It does seem they mostly using CAN bus for the batteries, Does the Axpert 5k 5ka/4kw support CAN bus? Thanks