epnaude

Growatt only has a cloud monitoring or android monitoring system, this is not real time though. +-5min delay

did anyone manage to set any parameters, It accepts the password but then displays "set parameter failure" when I try ti change something. Eg, I was trying to let it charge between 18H and 19H

I can now comfortably give my 5cents of opinion on the 100-95% matter as I have substantially researched this topic. Research shows that keeping the Li battery at 100% float is the WORST thing one can do to the battery. The cycling is the doing of the BMS and not the inverter. It is the way the battery is intended to be run. Not as the majority do by setting user setting so that the inverter overwrites the BMS. Simple example of a laptop- if I set my Asus laptop to max battery life on the battery optimiser it charges to 100% then cycles between 90 and 100 while plugged in. Batteries need to work,not stay at float. This is the normal practise.

just to add to the last few posts. What you see is normal, I have the exact same setup. 5kw with US3000. SOL will provide power using the solar and supplement with the battery during the day, when the sun sets it will switch to utilities a few minutes later. SBU will provide power using the solar and supplement with the battery during the day, however when the sun sets it will continue using the battery until it reaches the switchover SOC setting and then only use utility. I have mine set on SOL and the charge setting on solar only. works great for me. Yes the 100/95% switching between battery and solar during the day is irritating but I still believe this to be the act of the battery BMS rather than a safety feature on the inverter. Nonetheless, I doubt that switching between the 100/95% during the day will have a major issue on the battery life

Seeing that this is a very active thread, Is there anyone that has a 3rd party monitoring program going that provides real-time data for this growatt setup? The cloud software is nice but I don't like the delay

Its good to know, I think it's the BMS seeing that the BMS overwrites just about every setting on the inverter. below from today, can clearly see the cycling between charge/discharge gf

Need some help, Seeing that my inverter is behind my fridge and that Growatt software is on a delay, is there anyway I can get some realtime data? The PV Keeper software does work but it seems limited i.t.o. logging and graphing. I do like the look of Watchpower and from there perhaps export to a graphing tool that can show some nice realtime graphs. The idea is to have a tablet of sorts up on the wall next to the fridge. Anyone have something similar going that wouldn't mind sharing how they are doing it?

Hi Johan, did you ever manage to get watchpower working with your growatt?

I noted it as well, don't think you can change them to be honest, but not going to try either

As for the cycling between 100 and 95 when there is enough solar and the load is constant eg 300W, whey less than the potential solar (3000W) is this normal as well? I set the charge priority at solar first but as soon as the battery is full, it uses the battery instead of solar until 95% and then back to solar again. Cant think it to be my settings as by lower value is set at 50% and back to battery at 55%,

aha, thank you! at least I know now.

Seems another reset did the trick. The system now floats between 95-100% during daylight and consumes battery for a little while longer after the sun sets (on Solar first mode). During the night when running from Eskom my battery does have some discharge despite being on Eskom... You can see it between midnight and around 7am. During this time there was no load on the battery. A friend of mine with an Axpert observes the same. Perhaps the inverter itself uses Battery power? any idea?

Hi ErwinK, This inverter can peak at double its capacity for 10ms. Yes it went far above 5kW. If the load is not reduced within 10sec it will automatically shut off completely, and the power will trip. This happened twice with me, both times I flipped the changeover switch in the DB to get the power back bypassing the inverter. I then had to shut down the system and restart and then flip the changeover back to the inverter. The inverter does have a "auto restart after overload" setting, it is off by default. I am considering this as both times I was just a second to late to switch of the geyser element, a timer would come in handy. As you said, it comes down to load management.

Thank you for the compliment, Yes it is able to switch or supplement eg: 1. Solar first - during daytime solar will be used first and supplemented by battery if needed,(extra solar will keep the battery charged) and switch to eskom entirely if: A. No more solar power OR B. Battery goes below a certain set %. once the sun set, my inverter switch to eskom and will only use battery again if Eskom fails 1. SBU mode - during daytime solar will be used first and supplemented by battery if needed. when the sun sets the battery will be used until it reaches a certain % and then switch to eskom to charge battery while supplying power to the house again untill battery is charged to a certain %. (I am not using this mode as I saw that the system cycles my battery twice per night, as I don't have enough battery to last untill the next morning to charge on sunshine)

Hi, PlumbSolar , something strange is happening today. BMS works and communicates, but at SOC around 89-90% I can see that the voltage goes above 54V then all of a sudden drops and the charge stops/ solar input to battery stops. Similar to what you are having? I have mine set to SBU and SOL charge only Perhaps SiliconKid could assist he was very quick to send the firmware updates, mine was working fine before the updates but decided to apply them anyway (only the one completed) but nothing change. BMS is communicating fine. I have one US3000, settings 2 and 11 are set at 32A, cant change it,also setting 19 reads 54.0V, cant change it. Battery dont want to go above 90% even with the BTU set at 95%, tried al; the charge priorities. 5th Light on the battery also flashing then stops at off same time the voltage drops and charging stops,