Mattyboy

For the Sunsynk inverters (Solis seems to be similar) this is how i believe the inverter will behave. The batt on/off and solar power settings work together. Example Settings: On SOC - 90% Off SOC - 70% Solar Power - 1000w Even if your batteries SOC was 91%, but with only 900w of Solar power your smart load would not turn on. You would also need to leave "on grid always on" unticked and "off grid immediately off" ticked.

I will base this on peak periods time slots, weekday time slots and will take into account the worst weather conditions as well. This is all configurable under the system mode. Time Period 1 - 24:00 to 06:00 Battery SOC 70% Grid Charge Enabled Time Period 2 - 06:00 to 13:00 Battery SOC 30% Grid Charge Disabled Time Period 3 - 13:00 to 15:00 Battery SOC 40% Grid Charge Disabled Time period 4 - 15:00 to 17:00 Battery SOC 50% Grid Charge Enabled Time period 5 - 17:00 to 22:00 Battery SOC 25% Grid Charge Disabled Time Period 6 - 22:00 to 24:00 Battery SOC 70% Grid Charge Enabled The reason for grid charge enabled in time period 4 is that in the case of bad weather you would at least have enough SOC to last for the evening Peak time period. What is your grid charge amperage set at, this would affect time periods 2&3 SOC values. This is a base case, after a couple bad weather days you would be able to tweak it where necessary.

Hi Jeremy, Maybe i'm missing something, what made you go through the hassle of using the tuya+contactor combination. Surely all of the settings you are looking to do could have just been done through the Sunsynk's built in time of use settings? Also this limits future use of the smart port, for instance if your smart port was free you could install a solis grid tie to increase pv capacity. It would be interesting to see some of your daily usages.

Hi Wannabe, I prefer Deye. Their backup service is pretty good, their turnaround time when it comes to repairing a faulty inverter is far faster than the likes of Sunsynk (not too sure of Luxpower). These batteries have done well, I wouldn't add a new one to the mix due to differing internal resistance etc. I think your best bet would be to try sell them and settle on a 16kWh Dyness/Deye battery. These are well priced at the moment. Shouldn't be an issue but for peace of mind i would move one panel from the the string of 9 panels to the other one. As Denns has pointed out, Solis is also really good. I like Luxpower but am abit skeptical to install their larger units, if anyone has more experience with them would be glad to hear experiences.

Thank you!

also sustainable.co.za, haven't tried them before so a little bit skeptical. If anyone has bought from either site your input would be greatly appreciated!

Haven't tried it just yet, thinking of doing it though. Do you know where you can find one of these solis grid ties? I've only seen one for sale on https://thepowerstore.co.za/products/s6-4-6kw-2mppt-1ph-inverter-with-dc?srsltid=AfmBOoqnZPv0JLLlGV4R1VOe_ZTOQM_UOA4Hh8Td3mWsozhoDE3Z9qDi just not too sure if its a legit site?

Hi Sc00bs, did you eventually manage to get it to run smoothly?

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Sorry to hear....Wishing you a speedy recovery!🙏🙏

If you were to add another 5kwh battery to the sungrow system it would be roughly R150k (so then both systems would have the same amount of usable energy as the dyness has a 95% DOD), which would make it R6000 more expensive. You would also need to account for the two additional panels on the other system, add these to the sungrow system and you are looking at roughly R156k. I am not sure about Sunsynk/Dyness combo but i know that with a deye/dyness combo you get a 10 year warranty on the inverter and battery.

My pleasure, The price difference between 10kwh and 16kwh is negligible so 2x 16 kWh would be better value for money. If you wanted a larger battery bank, to best utilise it then more panels would be necessary. You are fortunate to have that much roof space with no shading! With the 12kw having 3 mppts you have plenty of flexibility. First prize would be to have all your panels on the north facing, next would be the east facing. I say the east facing as second best because on the flat roof you would want A-frame roof mounts which to my knowledge are quite a bit more expensive than the normal roof mounts,also when you say some are you meaning 3 panels or 6 panels. This is something you will just have to decide when looking at quotes. When it comes to sungrow, i would say they are slightly better quality and carry a 10 year swop out warranty (i would attribute most of their price to this) yes as they are an hv system you would incur less losses but at this scale they are negligible imo.

My suggestion for a system if i had the choice of starting afresh and looking at your needs would be: 1x Deye 12kw Inverter 1x Dyness 16kWh Lithium Battery PowerBrick Max (note in offgrid mode you'll be limited to 10kw of power from your battery) 12x 620w panels (JA,Longi,Jinko,Trina are all good) out of interest what is the orientation of your roof? For a system like this you are looking at around R134k ex vat (dependent on your site though) Re exporting to the grid i am not too au fait with joburg export rules/tariffs, but with the described system if you have an electric geyser/ pool pump and discharge the battery at night i don't see you being able to export much anyway. Hope this helps.

To your first question - I don't believe it is available on the mobile app. To your second question - which particular titles have peaked you interest? worst case scenario copy and paste into google and it should be able to explain. Its just super handy to have all this extra data in the case something goes wrong, helps to pinpoint the fault or time of irregularity.

that is super strange, everything seems to be in order. what are your batteries currently at? you may aswell enable grid charge (your TOU has ensured as minimal grid usage as possible). Try disabling your "MPPT Multi-point Scanning" setting as you mention you don't get affected by shading. if this doesnt work, try turning your PV off and waiting until there is no voltage for pv on your inverter screen and then turn it back on.