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Hi everyone I am quite happy that I stumbled apon this forum. I have found some very useful information already. A bit about my systems: Hooked up to the house: 3KVA SRNE inverter 5 x 450W panels 1 x 24V Easton lithium battery Running (or used to) my office: 1KVA ACDC Inverter (Asperix MKS) 1 x 330W Panel 2 x 12V Deep cycle lead acid battery's in series to make 24V State of the systems: The 3KVA system is a new install. Yes I do need to add another battery to the system as I run out of battery at 2am every day. (Budget only allowed for one at the moment) The 1KVA is 5 years old and the batteries died on me in the last month. So I am in two minds at this stage, sell the system and buy another battery for the 3KVA or do I just replace the batteries on go on. Any wisdom or thoughts on this would be appreciated. Extra: I connected a raspberry pi to the 3KVA Inverter and put together a go lang app to read the modbus information. I collect it with prometheus and then display it with Grafana. Was a very fun little project. All is running on the Pi4 without any issues. Next is to push that information to Cloud IoT through MQTT.

Can an off grid Axpert inverter be scheduled to charge the battery from 2 to 6am to use night time low rate electricity?

Hello, I need some help please! I have a backup system ECCO 5.5KW with a SVOLT 5.43KWH battery just for only 2 weeks. The BMS is communicating with the inverter (under LI2 - Pylontech). All seems to be working well - the battery was staying at SOC= 99% until 3-4 days ago when I noticed that the battery went to 98%. Then after a day went to 97% and now it is at 96%. Yet it is permanently connected to the grid. One other thing I noticed is that despite the SOC goes down as percentage, the battery voltage stays at 56v. What could cause the SOC percentage to drop like that while the battery voltage stays at 56v- could it be that the bms is doing some equalizing of the voltage cells and some recalibration.. Or is it the worst- faulty cell? Thank you!

Hello, I need some help please! I have a backup system ECCO 5.5KW with a SVOLT 5.43KWH battery just for only 2 weeks. The BMS is communicating with the inverter (under LI2 - Pylontech). All seems to be working well - the battery was staying at SOC= 99% until 3-4 days ago when I noticed that the battery went to 98%. Then after a day went to 97% and now it is at 96%. Yet it is permanently connected to the grid. One other thing I noticed is that despite the SOC goes down as percentage, the battery voltage stays at 56v. What could cause the SOC percentage to drop like that while the battery voltage stays at 56v- could it be that the bms is doing some equalizing of the voltage cells and some recalibration.. Or is it the worst- faulty cell? Thank you!

Continueed from an old thread as I thought might be beneficial on its own thread. Got 2x 100amp cylinder ceramic fuses. For positive and negative between the battery and inverter They good enough? 12v lifepo4 axpert VM 1000

There was a short in one of our ac outlets connected to our inverter which was tripping it. It seems to have melted the fuse holder. Interestingly it did not break the fuse. Anyone know what is going on here? I've sorted out the short. Waiting to find out more before I connect the battery. Don't want to blow the Bms.

From my memory I would not have thought you actually need 11.5 kW peak power for the low energy used? If not needed you can use a WiFi smart switch that you can easily override from remote. At our age we need to get gadgets that can help where we might forget. Further could it not work to only switch the grid to the inverter off instead of the whole DB? If afraid of battery being discharged to low the smart switch could perhaps switch the grid to inverter on say around 05h00 or a suitable time based on discharge level. @Chris_SChris_S if one uses a constant amount of hot water then I feel gas can turn out expensive. If only a few times during the day then the keeping a element geyser on temp without PV can be costly. Following the laws of physics gas does convert less heat than direct electricity. This will always be an ongoing debate. Apartments with 2 people can indeed be cheaper on gas.

Very strange behavior on an OG10/FL 5.2 system. Two FL 5.2 are connected in parallel to a single OG 10. When battery type is set to Kodak the reported consumption overnight with minimal load is three or four times higher than expected via Watchpower. When set to User and battery parameters entered the overnight consumption on Watchpower shows 90% which is more or less expected but the battery level lights show 40%-60%. Is there later firmware that allows FL 5.2 selection in the battery menu maybe? Is anyone running an OG 10 and FL 5.2 batteries sucessfully?

Somehow I am making some assumption which you can correct. As you are off grid the 1st thing to consider is to switch the inverter off if you can to reduce the drain from the fans. With always on WiFi one can use the low voltage 5-32V DC Sonoff to switch the on/off switch of the inverter. This is if the switch is a stay put switch and not just a trigger. If a trigger one can use the inching setting. Next will be a extra battery to be able to supply the load and fans during the night. If you can be without the inverter on via the above Sonoff and inverter is off you can get a external MPPT like a Epever with lithium setting to charge the battery when there is sun without affecting the inverter. You can then remotely switch the inverter on say 45min later than it is switching on to allow some power into the battery after the night time discharge. Lastly a question. Your reading show PV as around 400W. Increase the PV with another panel. Does the battery charge to high SOC before sunset? What size is it? In your case it is self power as well as the 30W of the fans

I just leave my grid feed on all the time. But sometimes I wish I could put a timer on it. I'm averaging 2.4 units a day, over 4.5 years, so it's hardly breaking the bank. But some of that power that gets used every day is the inverter switching back to grid when the loads get very low - which it won't do if there's no grid. So I could stretch things a bit further if I could switch the grid off at night and not have to worry about remembering to turn it back on. Shouldn't be hard really. A relay that handles > 50A, and a timer to control that. Or a 50A timer if there is such a thing. But maybe it's a complication too many. And it would take another 5% or so out of the battery if my thumbsuck calculations are correct.

are you limiting your battery charge current from solar to 40A? Those batteries are 1C but even at 0,5C that would be 50A max for one battery, with 5 batteries your charge in theory could be 250A. Please check if the solar charge has also been limited as that will cause the lower than expected solar charge rate. Your Inverter should have a separate setting to limit the utility charge current.

Hi all Im struggling a bit with the above mentioned combo. Client bought two five star 7kw?h batteries. It worked fine on an fivestar inverter. The inverter gave endless problems though And we replaced it with a sunsynk 8kw. I cant get the inverter to charge the batteries nor to keep the power on if ac is turned off. no timer settings being used. grid charge ticked. Using AGMv settings. No comms port on battery for bms so have to work on agm settings. anyone that maybe has some advice on what to check next? Kind regards Be4dawn

Hi Guys I found this Github collection for connecting up ESPHome with Battery BMS's that I thought some of you guys might find useful. I have BSL batteries so I am just trying to work out how to enable comms on the RS485 port works, I think it has to be done using PBMS Tools, anyone know? It includes repositories for: esphome-jk-bms Public ESPHome component to monitor and control a Jikong Battery Management System (JK-BMS) via UART-TTL or BLE esphome-basen-bms Public ESPHome component to monitor a Basen Battery Management System via BLE esphome-ant-bms Public ESPHome component to monitor and control a ANT-BMS via UART esphome-virtual-can-bms Public ESPHome component to emulate a SMA/Victron compatible BMS via CAN bus esphome-jbd-bms Public ESPHome component to monitor and control a Xiaoxiang Battery Management System (JBD-BMS) via UART-TTL or BLE esphome-tianpower-bms Public ESPHome component to monitor a Tianpower Battery Management System via BLE esphome-seplos-bms Public ESPHome component to monitor a Seplos Battery Management System (Seplos-BMS) via UART or RS485 esphome-pace-bms Public ESPHome component to monitor and control a PACE Battery Management System (PACE-BMS) via RS485 (Modbus)

Can you post these screens from your inverter: Solar (Solar panel detail page). / Li-BMS screen. / Battery Setting screen. / System Work Mode - Time of use Any chance your battery charge rate is set at 40A.

Hi everyone So I recently got a deye 8kw hybrid inverter with 3x 5kw Hubble batteries and 16x 550w pv I see that during the day it charges my batteries till 72% , and from my understanding is that one should never charge till 100% which I get but I want to change that 72% to at least 90% before it gets to the evening as the batteries last till about 5am and sunrise now in winter is late (being the max drawdown at 35% then it trickle charges from Eskom ) I will be getting another battery but for now can anyone help guiding me through it , I tried the manual but when it comes to Amps and Volts I’m lost

Still doesn't explain why the PV will drop when connecting to the grid. PV should always be at it's max when battery can be charged.

For me: ~81% comes from Solar ~156kWh / R376 from grid, prepaid per month ~656kWh / R1,762 from sun, saving per month ~812kWh / R2,264 total if no Solar+Battery per month Note: Rand amounts are based on prepaid CoJ for corresponding kWh Will save more Rands when CoJ implements increases in July 2024.

What if as the OP mentioned little sun and your load is higher than PV can provide and you have ticked USING GRID to keep the battery between 30 to 45% during the 24hrs time settings?

Just for the record, Mako and I are talking about the same installation. When using the 'Kod' (Kodak) settings in parameter 5 the SoC displays matches the batteries LED indicators. The problem comes after a night of running on battery power, the SoC has dropped significantly more than expected. I ran a test with only a geyser element running for 3 hours, and the batteries lost 7.4752kWh, while the geyser consumed 6.51 kWh- a difference of 962Wh The inverter won't be drawing 320W and all the other breakers were tripped the USE settings are being run with the battery sticker values at the moment as an alternative (but the SoC is more or less meaningless) it would seem that the USE settings are utilising more of the battery capacity, however the Battery LEDs are still showing lower than they should after a night.

Hello. I know that I have a bit of a peculiar configuration, but I believe that it should work correctly, yet I can't manage to make it work. This is the simple design of my installation: In the Home Load side of the Deye inverter there are 2 micro-inverters (1 GoodWe 2500xs and 1 APS 500). The hybrid Deye inverter and battery are installed in a semi permanent way in my current home and I installed them next to the electrical board. The two micro-inverters are installed in the attic and have very difficult access, so I don't want to mess with the current installation as I plan to sell this home and leave the micro-inverters and panels installed, taking the new Deye inverter and battery with me. So, the Deye inverter has no panels connected to it. This issue I'm having is, no matter what I configure, I cannot avoid the generated energy from the old inverters to flow to the grid instead of charging the battery. One way I found to charge the battery was to manually force the charging from the grid, but that way I cannot balance the charging power with solar production. Another way I found was was to disconnect the Deye from the GRID and it charges the battery as expected, both are not solutions. I believe that there may be a firmware bug here, but I didn't find where to download the firmwares on the Deye site to compare with the version I have and maybe check the list of fixes. Note: the CT is installed, but I understand that it shouldn't be necessary as the GRID input of the inverter is directly connected without any other connections in-between to the GRID. Do you have any ideas on how to overcome my problem, preferably without doing any re-wiring? Thanks in advance. Cheers.

First, your batteries are running down to it looks like 25%. That's the level your system has set beyond which it will not discharge whilst there is grid. So given that the batteries usually protect themselves by turning off at 10% left, you will never have less than a useable 15% of 25kW IE 3kW in hand if there's no grid and no solar. Reading from left to right we see your batteries still having quite a lot of juice left when the geysers switch on. Then SOC drops off pretty quickly. Load is 5kW, which is not nothing but also not impossibly big. Then the batteries get to 25 ish % and stop discharging (as we just discussed). The next bit is interesting. You have about 3kW of PV from about 10:00 to 15:00 and your batteries do charge. But they get a clobbering again at 18:00. Then they don't do as well as they did the night before. Your graph starts at midnight and SOC is above 50%. The next night you are down to just over 30 by 23:30. And your consumption is generally higher in the evening than during the day - which might not sound that unusual, but with PV you want to reverse that situation if you can. I'm puzzled that with 16 x 550W panels you are only getting 3kW, but my technical ability is such that all I can do is be puzzled. I also notice a sudden jump in SOC at about 16:00, when PV is tailing off and demand is actually starting to increase. What happened there? What's happening at night? Say 17:00 to 22:00. Can you move any of that to the day? Look at the graph I posted - I'm doing most of the heavy lifting, so to speak, during the daylit hours. Because I paid a lot of attention to that graph I can look at the shapes and tell you what's going on. But my pool pump turns on at 10:00 (earlier in the summer). Dishwasher was run about 9:45. Heatpump (water heating) kicks on at 12:00 as per the timer. Then you say that very low line in the early morning, and late in the afternoon. We are running at that level from about 18:00, so the battery gets a gentle ride through the night. (we do about 200W around midnight - external lights, wifi, alarm system, fridges, stuff on stand-by - you are doing 5 times that. Why?) So try to do as much electrical work as you can during the day. But also, your PV array which in theory is twice mine, is not delivering twice the performance. So why is that? Your PV seems a bit low, and your loads never drop below a kW. Lots of questions here. Do you have comms between the inverter and the master battery in the pack? NB. We have full gas for cooking. Heatpump for hotwater (fast and lower consumption). LED lighting throughout. So there's some savings there.

May be we can learn something from the auto industry. The unknown in this research is what sub type of lithium were tested. Cycles look like NMC.

Simply explain why

From time to time I've opined that a gap must be opening up in the market for maintenance of solar systems. I'm not allowed up ladders anymore (three unexplained blackouts) so I can't even give my panels a good clean. Besides, there's a bit more to it than that. There's more and more systems, getting older and older (mine is nearly 5 years now) and what's a layperson to do? Anyway, I have a team from my installer coming on Monday. They are going to clean panels, check all wiring between panels and inverter, run diagnostics on the inverter and battery. I am not naming the installer because it is not yet clear to me if he provides this service only to sites he installed or more generally. I will clarify on Monday. Depending on uptake he may launch a product by which you pay a small monthly fee and they check your system over once a year. I shall report back. The cash price is 2K - for cleaning and a report. I have asked them to do a small (they say) electrical job whilst they're here, and obviously they will charge separately for that.

Morning all I replaced my Growatt 4.8 kva inverter for a kodak 4.8kva inverter as my growatt wasnt recieving the power from my solar panels ( other than that it worked perfect ) Since installing the Kodak it only charges my battery to aprox 50 % but shows 100 % on the inverter What can i do