Antonio de Sa

Yes. get use to it, Growatt inverters fans are a bit noisy. 

We are blessed with sunny winters. 
Instead of considering a gas geyser, a 150l electric geyser is around the same price.
Consider that in series with your current geyser. Both can be heated to max temp during the day in sequence and should give you more than enough hot water.
Your solar in the day is free energy. Gas geysers consume quite a bit and that would be an extra expense.

My two inverters are installed inside a cupboard in a spare room, herewith are my battery and inverters temps in the last 30 days. 

Welcome to the forum. In which country are you residing? Being an installer and master installation electrician in South Africa judging by your pictures above you have some serious installation errors. First of all you need a external disconnect switch apart from the protection offered by the inverter and batteries for one reason only safety in case of emergency. You are entertaining 20kw of DC energy. 
Secondly your dc cabling size (35mm²) is incorrect you need to have it changed to 70mm² suggested by @Tsmithf. The crimping on the battery and inverter terminals seems to be a problem judging by the main battery terminal connection on the inverter. I only use a hex crimper on dc cabling. The 2 battery's cabling must be exactly the same lengths and short as possible otherwise you will have different resistance values between the 2 batreries which is problematic for current sharing. The colour coding of the DC cabling would be a disqualification in our country and a COC not issued.
My suggestions to your installer.
1. Both batteries to common busbar.
2. Disconnect switch or DC curcuit breaker between both batteries.
3. Main Disconnect switch between busbar and inverter.
4. Use hex crimper for all DC power cabling with red cable for positive and black for Neg and 75mm² cable (20kwh power source.)



Above example of hex crimping.

Good evening all after being out of action due to above medical reasons. I will keep this short so we can concentrate on solar matters.
It was close for me leaving this life. I am thankful for world class physician and surgeons in the C care Welkin hospital in Moka. Special thanks to my wife that endured the long waits at the hospital.
Just a brief summary as to what got me in hospital.
I was originally admitted for hypoxemia where my blood oxygen saturation was below 82%.with 3 blood clots in the lungs.
I was diagnosed (Laboratoire Cerba) in Paris with a clotting disorder called thrombosis with thrombocytopenia syndrome (TTS), and it is rare—an updated safety analysis showed that, as of March 19 out of more than 2.2 million people who got J&J,Vaccines 294 cases of TTS were reported and thirty people died due to clots in the lungs. I am currently on Rivaroxaban (Anticoagulants) under the brand name Xarelto.
I will be home soon to rest for a while before getting into my daily routine. 
Many many thanks for all you guys that rallied your support around me in my diffucult time it is highly appreciated.
Forgive me if any above is written a bit bonkers i am still very queasy from the op and all the medications that is now finding their way out the body.
Have a good evening.

Good afternoon all,
First of all @TaliaBis doing much better and is now in the general ward awaiting pathology tests that has been sent to Paris 'Laboratoire Cerba" operates on the French and international markets of specialized clinical pathology. The reason the physician had made the decision to seek specialized intervention is they can't find any traces of DVT( deep vein thrombosis) where the blood clots could have originated from and no injury or surgery that could have been the causes of the clots in the lungs.  According to @TaliaB brother they are not comfortable to discharge him until the results is known from the pathologist in France. He is taken off all oxygen and breathing freely and comfortable. He is still on blood thinning iv as a precaution measure. By the sounds of it he is now desperate to get back home to Cpt who can blame him.
Hopefully this will be my last update as i am sure he will be back on the forum soon then he can share more detailed information about the cause of the sudden blood clots.
Regards
Derek.

Good evening,
I had word from @TaliaBexhausted wife after a very long day at hospital as the surgery lasted 10 hours. The physician said that the procedure was a success and both clots was removed. He will be in ICU for the next couple of days. He was removed from the ventilator and back on high flow oxygen treatment that is a good sign. Futher as precaution he is receiving anti coagulant medication and antibiotics through iv placed in the main artery in the neck. His brothers and wife has also joined the family today so from here forward i am sure all will be on the up and up. Thanks to all on the forum for rallying your support around him it is much appreciated by the family.
Have a good evening 
Derek.
 

2x5kw Sunsynk
3x4.8 Dyness
18 330w panels in PTA
3 years installed in Dec of this year - i have saved approximately R72k in Eskom costs since install, at an avg of 20k per year. Its an approximate figure because i havent done the work to accurately map the Tshwane tierd rates and just used an average - maybe one day when i have the time / inclination. We still use quite a bit of Eskom monthly - im nowhere near these guys' efficiency and utilisation. Another battery and a couple more panels would help but have turned my focus to water shedding for now. Ideally would like to have 20-25kwh batteries and 12kwp panels at the end of it all but for now it works.

Morning all,
Spoke to his wife this morning, he is moved from high care to Icu and placed on a ventilator as the high flow oxygen treatment is no longer viable. They will surgically ( Pulmonary thromboendarterectomy (PTE) ) remove the 2 clots in his right lung that has not been dissolved by the IV medication. He is scheduled for 12 today in Mauritiun time 2 hours ahead of SA. The specialist is positive for a favorable outcome. I will report any further news.
Have a good Saturday.

I had an exceptional customer service experience with Magneto when encountering an issue with my Magneto Lithium LifePo4 Rack Mount 5.1kWh system. I had a problem where my battery would shut down at 30%. Despite this setback, the Magneto team flew from Johannesburg to Cape Town and then drove to my residence in Swellendam to address the issue in person, showcasing their commitment to resolving customer problems. I want to thank Brian Mclachlan and Ferdie from Magneto. I highly recommend Magneto for their exceptional customer service and reliable products.💫

Sunsynk 8kW
6420W solar
10kW battery

Everything is electric in our house so when a few things are on the stove I sometimes get spikes above 8kW and use a bit of grid, the rest of the grid usage is from cloudy days when I can't cut down usage any more.

Specs of my system in the signature.
It's an off grid installation. I am on prepaid and I have a change over switch.
Being compelled to charge the prepaid at least every 3 months, else one is completely disconnected, I work on R50 recharge per month and use some if an when really needed. Always keep a ~200kWh credit on the prepaid.
Alas, I could get away off grid completely. In dire straits I still have my generator.
Before my solar installation my average usage was ~200-300kWh per month. Now with Solar I use a bit more, because I can 😉
I do have a gas stove and need a 9kg bottle every 2 months or so. Those I still get at R230 from a local supplier

Below is my spreadsheet I started when I started with solar.
The first couple of months were incomplete info as my Solar Assistant was added end of October 2021.



 

Good afternoon forum members,
Update regarding @TaliaBprogress in hospital. I spoke to his wife this morning and was given permission to post what happened his symptoms and his progress. He suffered a pulmonary embolism and had difficultity breathing. He was placed under sedation for the past 2 days and is currently receiving high flow oxygen therapy and was placed on an Streptokinase drip to dissolve the blood clots in his lungs. He is still in high care unit and not out of the woods just yet but doctors are positive of a full recovery after blood clots are dissolved and clears. 
Derek.

He did contact me as well last night & was in high spirits albeit not in the best shape. Godspeed to him & his family in this difficult time. He has been such a massive contributor to this forum & I hope he continues to do so. If I hear from him I will also revert.

Good evening forum members.
I just got word from @TaliaBbrother that he has been in Mauritius for the last 3 weeks for work/ vacation and has taken ill this afternoon with serious breathing problems and was admitted to C Care Wellkin hospital in Moka Mauritius Apparently he is in high care unit awaiting test from pulmonologist. I will keep the forum updated and pray 🙏 that he will be ok.
Thank you Derek.

I'm pretty sure that if the battery is no longer under warranty, it can be open, changed the cells configuration and set it to a 48 V.

Ditto, just remove BMS and add a 15/16S BMS to the now reconfigured battery, I guess you'd have to get more details on what the cells' specs are, probably not 400Ah, I'm guessing, so size the BMS accordingly...

I'm pretty sure that if the battery is no longer under warranty, it can be open, changed the cells configuration and set it to a 48 V.

First of all welcome to the forum.
My personal opinion on going with rent to own option comes with risks if you look at the current solar industry climate. Since the miraculous disappearance of load shedding many solar companies including rental companies are taking strain to keep head above water. There are many solar companies that has applied for voluntary liquadation and should your solar system be part of the company assets they could remove the system should you not be able to come up with the capital. I would much rather try to own the system via a bank loan or as @Bobster.suggested through your bond repayments. 
The above suggested system falls in the mid range of quality and storage capacity. Off grid is quite a diffrent ball game and i would not settle for less that 20kwh battery storage and 8kwp solar backup. Redundancy is the operative word when it comes to off grid systems and needs careful planning and load considerations.

Firstly that's not a report that I would accept. It says nothing at all about your battery other than it was swollen. Their is no data from your actual battery shown. It says possible faults including faulty bms - that is in the battery and therefor their responsibility. You need the actual data from the battery. You should also get the data from your good batteries using BatteryView to show what voltages etc were being reached.

The 1st thing when we see such a drop in Freq is could it not be a stray reading. 
As per the Eskom info. At a value of 48.2Hz most generation would have tripped causing a blackout. This is very normal to shut down at such a low level world wide to protect all equipment. 
Freq will also be the same country wide. 

Also, on my system I did not see any spike, and I sample every second. see last 24 hours dashboard.

Are you sick and tired of mosfets and/or igbts  blowing  in your PWM circuit?  Are you at your witts end? Then look no further. 
The answer lies in a rotary converter. Not those ones that generates power from a large dc motor, but a transformer based one where the full H-bridge is entertained by means of a camshaft  that operates microswitches. Think overhead camshaft here!  The camshaft is in turn operated by a small dc motor. 
Have a look what this guy practised out of what he called junk spares :
 
 
https://hackaday.com/2024/08/31/the-trashiest-of-mains-inverters/
 
 

Personally I did not find this winter much better than last year. During last year we had LS during winter and that caused 2023 to look bad. Due to being grid tied the lack of grid does have about 15%+ reduction for me if LS is during the good production period. 
YTD for this year. Yes it does look a lot better than you guys down under. March shows a big jump as the lack of LS played its part. 

I do exactly same.