Steve87

Todays technology can always be reviewed in a few years much like the Sunsynk has in the above posts. Solis is the latest flavour. At the same time as the Sunsynk Honeymoon was the Woolworths (because of price) FreedomWon Honeymoon at the same time. How time & brands change. 5 years of good service from any of these brands is doing good. Tech changes quickly & so does the utility supplier. Given you on a farm id not even bother with a hybrid that is bi directional. The costs of the transformer pole doesn't make sense. 2 X 6kW off grid deyes are the sweetest honey in terms of price & redundancy. Get a small 6kW Genset with the savings. I love the quality of the 16kW deye but you could buy all the items I've mentioned in this paragraph & have change to spare. At R7k a pop it doesn't get better than that. The Deye MAX is somewhere north of R40k. Too much in my opinion for the romance.

Yes, you will need the Rs232 cable first. And because they share the same port, it's a choice one or the other. Physically impossible to have both in at the same time.

The 50kW Sunsynk/ Deye the port is side on.

Yes that port is on the side. Your inverter must be able to accept a logger. This plugs into the Logger port.

See pics attached...

From memory there is another way via the RS232 port from where the Logger connects. It's a DB9 looking printer port. Look on SA if they sell it. The Sunsynks kept on changing firmware & all sorts of stupid things. One thing for sure the RS232 always works.

The PLC will no doubt be using 24V. Not a hazardous voltage at all. Having seen enough VFD installations I'm going to say yes rather separate them. Safer rather than sorry. Probably not that many DC cables anyways...

Some one once told me its like the worst restaurant you have ever been to. The service is slow, the food is cold and the the food of very poor quality. So you have a bad experience & you keep going back and pricing keeps going up. For many that have the choice we never go back but for many they stop noticing and actually just put up with it. In the end I think for many they just become irrelevant. But people don't realise their biggest customers are farmers & that's our food security & based on that fact I guess they will have to keep being a going concern one way or another even if it's by hand outs by the state.

Hi Corne, not really a unique situation. The modern Commercial sites have this type of Micro Grid topology mostly if there are Grid ties involved with a Hybrid BESS system that's are AC coupled on the Load side. The advantage of AC coupling on the load side is the Grid tie gets Voltage ref from the Load side and will produce power all the time. If on the Grid side it will island if Grid power is lost. I used to know the Victron architecture well but I certainly am not current on it at all. The Victron does feature Frequency shifting, however, it's only possible when there is no Grid power involved because it can shift the frequency & the Grid tie will ramp. When there is Grid power that's not an option. If costs were no issue I'd DC couple with a Victron MPPT because the extra power goes to the Battery and the Mppt will self regulate as it's a Victron product. But price is an issue and the Solis is cheaper. I wouldn't worry about losses at this power level of AC coupling Vs DC coupling I think it's going to be negligible. There is a another way depending on how handy you can be with HA and Venus OS. Modern Grid tied inverters don't rely solely on frequency shifting to limit power. They also support RS485/ serial Comms & use Modbus. The Solis will definitely feature Power dispatching. Basically you tell Mr. Solis: hey I need 2kW from you & he will produce 2kW. So in HA you will have your instance looking at battery SoC from your Victron & tell the Sols to limit to Load when the battery is above 95%. I actively work in this field with much larger megawatt plants & a controller that can arbitrage and dispatch power as required to service the plant as a micro grid. However, this is small residential project & all said & done probably the best & bulletproof option is the Mppt from Victron. The Grid tie option is affordable but adding an EMS (Energy management system) doesn't really make financial sense. If you however, you have the time and patience it's doable, there is a Solis integration available on HACS as well as a Venus OS integration. Blend the 2 together and write some automation rules and you in business. Doesn't even have to be complicated, can even program something simple like Above 98% SoC Shutdown the Solis and startup again below 95%. Keep it simple...

I think the main issues the Chinese battery makers are having is the cells can deliver that energy at 1C but the BMS cannot. The only BMS I'm aware of that can go big is the JDB300A BMS & that said I have not seen anything that is close to that. Maybe 230A at best. Of course if you stack them then this unlocks that energy but I always ask the question: if I have a Sunsynk MAX or Deye 16kW Inverter and I demand 16kW of power I would like to know I can draw 16kW instantaneous from the battery. Even the Deye SF16 is limited and that's probably a PACE BMS. No insult to the Knyee product but the above 12kWh Chinese batteries all seem to not be true 1C. The only one I know of is from FreedomWon & they not using a Chinese BMS at all. The only ones I know need to be stacked in 5kWh modules or 10kWh modules and my calculated guess tells me it's the BMS tech that struggles to regulate that power through a printed PCB. On the other hand a JBD uses a physical DC Contactor rather than a the mosfet arrangement. Food for thought. All the HV inverters and Batteries also deploy DC Contactors as do EVs.

Very happy to report that my invasive balancing and getting my 10/8 back into a positive direction has bore some fruits...Was a bad case of not reaching 100% and giving the poor battery a chance to top balance and level things out. She is now producing what I expect and I'm happy that it wasn't anything worse than I thought. Sometimes there is a good ending...the delta to Lowest and highest cell been reducing for a few days and cycles.

By the looks of these they are the low voltage MPPTs that accept+-120V Max DC input volts can you confirm? The Higher voltage MPPT machines were usually much more valuable. My OG7.2 just went Pop recently and I managed to acquire a used OG10. These Axperts are really solid if installed properly and taken care of. I have an MKS2 that is 8 yrs old & still chirping away. Good luck with the sale, I fear you might have to give them away because the market dropped a lot & you probably better off keep these for a rainy day. Great machines I hope they find a good home.

@robkowa they do exist but they are probably busy and hence you might not find them maybe waiting around. The market did take a slump so some of the independent sparkles honest went for more secure work or the really good ones moved into doing commercial work and smaller work like this is no longer paying their bills. No clue where you are but call Gideon if you in Gauteng: 082 905 0773.

I don't think you will get solis to display these details on the Solis. The Orion JR BMS also has these messages displayed in its CANbus. In fact the Orion can be configured to display any host of information as can be configured on the CANbus and you can make your own CANbus frames to configure with any inverter or EMS to read. But this is what you have to understand: when a battery OEM decides to support an inverter they have no control over what the inverter integration team will want. Generally the bare bone basics will be battery temps, Charge and discharge limits & SoC. This is almost an industry standard of sorts. However, you can't force Solis nor FW to make or build features that only you want. They can see it as a suggestion but that's about it. The points 1,2,3 &4 are all readily available on the BMS and on the Orion ready for broadcast if configured.

Just glad you managed to get a favourable outcome in the end. Politics aside it's important where you buy equipment and people forget that post sales support and lifecycle and probably the 2 most important aspects of any piece of technical equipment purchase. Living in a remote cross border location can complicate life for you even further.