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https://powerforum.co.za/topic/34416-solar-assistant-rs232-usb-cable/#comment-230439 I have the suitable cable advertised here since the client sold the Sun-Batt.

Item: Solar Assistant RS232 USB Cable Self Crimp (Crimped currently for Sun-Batt Batteries) Age: Purchased 28 April 2026 Price: R299 Payment Method Accepted: eft Warranty: Not sure Condition: Excellent Location: Durban Reason: Changed batteries Shipping: Pudo R50 Collection: Ok Link: see below Info: This Solar Assistant RS232 to USB cable is in excellent condition and offers reliable connectivity for your solar power system. Originally crimped for Sunsynk Sun-Batt batteries, it can also be crimped for any RS232 battery or RS232 inverter, making it a versatile component for your solar setup. Enhance your solar energy system with this high-quality RS232 cable designed for seamless communication between your batteries and inverter. Whether you're upgrading or maintaining your solar power station, this cable provides a secure and efficient connection. Compatible with Sunsynk Sun-Batt batteries. Data can be imported into home assistant. Can be crimped for any RS232 battery or inverter. Self crimped for easy installation Reliable RS232 to USB connectivity Excellent condition, secondhand but fully functional Ideal for solar power system monitoring and control Upgrade your solar energy system with this durable and versatile RS232 cable, ensuring optimal communication and performance. Perfect for solar enthusiasts and professionals looking for quality components at an affordable price. Link: https://solar-assistant.io/shop/products/rs232_self

Where are you based? I recommend getting a professional 3rd party to check the entire system thoroughly. Wouldn't trust the installers know how given the south facing panels.

South facing panels is a waste in South Africa, won't get much production.

Another company to stay away from, despite them originally being legit : livestainable.co.za See Post in thread 'Experiences with livestainable.co.za' https://mybroadband.co.za/forum/threads/experiences-with-livestainable-co-za.1214305/post-34457298

This is a common issue, well known to Sunsynk /Deye, just that wifi board can be removed and taken in to Sunsynk over the counter and swapped for a replacement no problem. You could do it yourself actually. The entire inverter doesn't have to be removed. Rather do it within warranty and they'll replace free of charge

Sold

Bump still available

Will message you. Full monitoring details in home assistant available. Thanks

Installed August 2023 Timer setting was to discharge to around 40% daily. Which didn't happen daily probably as per the cycles being around 310. At 20% would be very few times when the municipal power was down for a while, with the inverter switching off the loads at 15% or 20%. The Sunsynk 16kwh inverter they were linked to has been sold already and the site was deleted, so the historical data is not available. Further diagnostics it could be extracted from the battery if need be.

For anyone wanting to run things locally on home assistant without the cloud, smartpad have quite a few options and their service is exceptional. https://store.smartpad.co.za/index.php/product/esphome-smart-controller-energy-monitoring/

Sold

There's no 16kw 3 phase. You should look at the 15kw or 20kw 3 phase

Have a look at the Deye SE-F16, 16kwh and around the same price

Try Disable mobile data so phone stays on the logger WiFi. If that's already done : Try these pages instead: http://10.10.10.1/config.html http://10.10.10.1/goform/config If no luck, hard reset by holding down RESET button for 10–15s while connected to inverter, and try again. Lastly, try another Sunsynk logger in your inverter and see if the issue persists, these loggers do fail at times, RMA it