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epnaude

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  1. 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
  2. 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
  3. 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
  4. 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?
  5. Hi Johan, did you ever manage to get watchpower working with your growatt?
  6. I noted it as well, don't think you can change them to be honest, but not going to try either
  7. 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%,
  8. 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?
  9. 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.
  10. 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)
  11. 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,
  12. Tnx for the compliment,yes the electrician was a very nice guy that came out at last minute and didn't charge an arm and leg to redo the DB. Will recommend him, he is in PTA East Moreletta Park.. Finally my wife thanked me, not only for not having load shedding this morning but also for having her kitchen back, and I am back working in my room as the inlaws are over again... Might have to rip out the floor next. I measured the distance between the fridge and inverter once I moved it back in, 50cm. Doubt that will give any heat issues, I did put quite some strain on the inverter today, at some stage trying to overload with geyser, pool, washing machine, coffee machine, dishwasher but it never switched off. It did go above 7kva for split seconds but that was it. I will definitely pay attention to the temp in the summer. All that is left is to tidy the wiring around the combiner box and to label the DB. I am very happy with my setup and looking forward to optimize usage. I did measure quite a bit of voltage drop, around 16V. I am using 6mm wire from the panel to the combiner (15-20m) and 16mm from combiner to inverter (7m), little bit off heat on the fuses but the cables were cool. PV wattage peaked at around 3300W, I might be able to add another panel to each string but definitely not now. Last night the battery discharged to 50% around 12am, then recharged using eskom and discharged again to 50% at 7 this morning then started charging by the solar around 7am The monitoring software is still a bit of a nuisance for not being instant, but it will do. (I did receive a Monitor software on a CD, still have to check that out) Here are some screenshots of the mobile app and cloud server. If anyone is not yet convinced to get solar or a Growatt inverter...I am certainly glad I did it. used 15kWh from solar today and no eskom... Cheerio, thanks for reading.
  13. What an eventful and tiring two days. It was all worth it, especially when I flipped the switch to change over to the inverter and gone was my days of load shedding. So yesterday the Electrician came over to rewire the DB while I did some further wiring and mounted the inverter at its secret spot behind my fridge. About 40cm gap between the fridge and back walls. Everything will be nicely tucked away in a hole. I don't believe heat will be an issue but I will monitor it closely When all the old circuit breakers were removed the Electrician showed me the aftermath of what appears to be damage over the years of loose connections, an accident waiting to happen. So the old breaker box was converted to DIN rail and it looks so much better. The changeover switch works like a dream, easy to bypass the inverter to eskom when work is needed, also with another switch to kill the mains to the inverter. I wanted all the switches in 1 DB, luckily I had the space. The main cables to and from the inverter was pulled through the back of the DB that is conveniently located on the other side of where the cables needed to be. A short reroute through the kitchen and behind the fridge. Also received the combiner box this morning and finished pulling those cables about 15m to the roof. 5 pairs of cables later and a brain fart left me with all the wires nicely pulled through to the combiner box but with NO idea which cable is on what panel.... back I went again, pulling back and forth to label them. To get on the roof is a mission by itself and a walk to the other side with the ladder(to short to reach the roof in 1 go) All in all, I am happy. The inverter has some fan noise (quite loud) with any load above 600 ish Watt, but believe this will be more quite once the fridge goes back in. Tomorrow I will do the finishing touches and tidy up with some trunking and try and find a way to do live monitoring using the wifi dongle. Currently it appears to be delayed by a few minutes as it connects to a cloud server for the logging. On a side note, there was no need to flash the firmware to make the BMS work as intended. I only changed the dip switches on the battery and connected the monitor cable in the right ports.
  14. I want to split the incoming Eskom power, through another breaker to my inverter(which will be behind my fridge) and back into a changeover switch with eskom in the DB again. So yesterday I decided to peek into the very very old DB box (Only Hulk can flip the mains and green geyser switch on) to see how I am going to drill trough the wall behind it. WOW!!! as my dad always says...."hoernes" came to mind. and to believe that I got a COC for this when I moved in. Luckily I am shit scared of electricity and used some of my wifes kitchen mittens to tuck some wires back in to close the lid again because BOOOOOM!!!!!! a massive spark and a fart later all power went off... there was a loose ground that was bent and hanging by a molecule that broke loose and made contact with the live bussbar. Somewhere the Eskom power tripped as well outside my house, because after all that up and down of the mains switch till i started sweating the power was still off. And despite my dislike in Tshwane and my billing dispute, they came within 4 hours last night after logging a call on their SMS line. Did you know that the breakers of the houses are mounted on top of the street lights...? Bloody hell, I was walking up and down the street like headless checking looking for my meterbox and wandering 1.where I am going to get a crowbar and 2. which meterbox should I try first. It is just then that I decided to get an Electrician that will get rid of the old breakers rewire my entire DB to DIN rail and assist with the Solar breakers in the DB. Went around town today and bought all the needed stuff for tomorrow. And seeing that I had some in-laws over, It was the perfect time for me to mess up the kitchen and make a lot of dust drilling through walls and pulling some wires for the electrician. Takeaways in the flat outside it was for them.. I am using 10mm wire between DB and Inverter Tomorrow will be a long stretch to try and complete, I already got 100m of 6mm black and red PV wire and will connect the panels to the combiner box using MC4 connectors while the Electrician has his go at the DB, I'm not going near that thing again. Had to spray my pants to get the stains out after yesterday. The combiner box that is due to arrive tomorrow. From the Combiner box to the inverter is about 5 meter. The inverter can take up to 16mm wire. I will drive around and get some from the closest shop. If they don't have, I will most probably just end up using 2 x 6mm on each pole for that 5 meter final stretch. Stay tuned, will post the rest tomorrow. If I don't, we have loadshedding and still no solar.

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