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In the diagram below, I describe my understanding of the comms connections @bash described, which assumes that the BMSs on each battery can be made to work together (a basic way being that they are all the same SEPLOS model, with the same firmware installed).
My question is of course, why would the daisy chaining of BMS comms not work with other BMS models?
You've mixed software and hardware concepts within the same question, making it unanswerable.
Yes, you can have multiple BMS units connected to the same RS485 bus, with the Inverter acting as the Master.
Either the inverter must be able to support different Modbus variants simultaneously, or else the BMS units would all need to be of the same type (eg from the same manufacturer).
You can't just make all the physical connections and then expect the inverter to sort it out for you!
I love diagrams. Even if more detailed, they would never be really right. Still, they make a huge difference to ground a discussion on the key aspects!
Solis menus imply the inverter is only meant to work with one BMS from one battery manufacturer. And Seplos is not included (my third reason to want a different BMS).
I will ask Solis and post any answers in the Inverter thread
8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kW export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; Vaillant Arotherm Pro 7kW; 100Amp head, HA lab on mini PC
Definitely for the money I think Fogstar are almost impossible to beat in the UK, certainly without taking an unnecessary risks for a (potential) small saving with an unknown supplier or importing yourself.
I agree, paying more for Frogstar does not guarantee the firmware on the BMS will work smoothly.
Whenever I had issues, their answer was often that I may have not installed it correctly.
8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kW export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; Vaillant Arotherm Pro 7kW; 100Amp head, HA lab on mini PC
Definitely for the money I think Fogstar are almost impossible to beat in the UK, certainly without taking an unnecessary risks for a (potential) small saving with an unknown supplier or importing yourself.
Fogstar sell ready made kits for over £2k.
The ebay links I shared are ready made batteries from the UK for £1k. They have been beaten already in the UK! 🤣
A fan club here up will not help to get them to catch up.
8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kW export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; Vaillant Arotherm Pro 7kW; 100Amp head, HA lab on mini PC
@batpred Er sorry all your links to these cheap batteries are ended, sold out or not found.
Please post new links, it will help others. The ones I posted are business sellers.
Ebay keeps the links available until the stock sells. Sometimes sellers create new listings even when they have more stock of the same available.
8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kW export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; Vaillant Arotherm Pro 7kW; 100Amp head, HA lab on mini PC
aliexpress seems to have even better options. Personally I only used it for lower value items and had no issues.
8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kW export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; Vaillant Arotherm Pro 7kW; 100Amp head, HA lab on mini PC
It's you @batpred , who is doing the research into cheaper storage batteries from online sellers.
ermm.. I do not have a monopoly on helping others to save money...
8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kW export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; Vaillant Arotherm Pro 7kW; 100Amp head, HA lab on mini PC
In all fairness you haven't provided any help at all, just links to some unknown and untested batteries from a random eBay account.
It would have been more useful to have given first hand information on these cheap batteries, but unfortunately although you seem to think they are the way forward, you haven't bought any yourself.
Please do though report back on your findings when you have bought some.
