Jeans

I connected a multimeter on the breaker where the inverter connects to the main DB, and I get a reading of 0.096V this is then the same voltage a get across all the switches on the main DB board. If I flip this same breaker off, then there is 0V's. on any of the grid-fed circuits, except the same 0.096V towards the inverter. This does not add up to the 4-5V I see that the inverter reports so this 4-5V must be related to the inverter itself.

I have a Sunsynk 5.5kW Hybrid inverter that connects to solar, battery and grid. I have a CT clamp around the grid feed and my load is split between a critical circuit DB board and a non-critical/mains DB board. When the grid is connected/on then the voltage is between 240V and 250V which is the expected behaviour. However, when the grid goes off, then there is always a small grid voltage that the inverter reports, usually 4-5V. Even if I go to my mains DB board and drop the brakes to Eskom this small voltage is always reported by the inverter. I would imagine that if the grid feed is disconnected that the voltage should be zero I'm wondering if this is something anyone else has observed and more importantly if someone can explain why this is observed.

My only concern with this approach, is how do you get it certified so that it doesn't negate your property insurance?

Till this day BSL has not responded to my questions and any means to contact them. It's very clear to me that the support on a BSL battery will be a problem in SA. Steer clear of this brand. The installer bought back the BSL battery from me and in exchange I upgraded to a Freedom Won battery. At least there is proper documentation for battery and BMS, plus it seems the support structure is good.

@Sidewinder Would love to hear your input as you also have SS/BSL/SA combo like me

@BSLBATT I would really appreciate your response on the above questions?

If the Pi is causing so many issues with battery BMS's, then surely this must be documented and available to the public?

This installation is 5 months old and from the get-go, there was an issue with the battery. The first battery’s SoC would go from anywhere above 60% to 100% when charging and drop from anywhere around 30% to 0% when discharging and not once or twice, it happened almost daily while charging and about 10 times while discharging. I’m now on my second BSL battery after the first was replaced by the supplier because they were not able to find or fix the problem, but this new battery is not performing the way it should either. I’m still in discussions with the installer on how to proceed.

The problem I have is that the battery is not performing according to what it's suppose to. I've reached out to BSL international and they refer me to GetOffGrid, whom is the local supplier. GetOffGrid is referring me to the installer and the installer is demanding a call out fee of R2500 before they do anything. How do I go about getting the problem resolved?

Thank you for the response, but I have 3 follow up questions Your post did not answer my question regarding if the Pi void's the warranty when connected with RS232? How can I monitor the battery if not through the use of a Pi? Do you have software or know of software that is safe to use and to which port on the Battery will I have to connect it to? If the Pi alters the "floor and ceiling" as you put it, how can this be corrected? Thanks

Hi Everyone, I've seen a lot of posts on using solar assistant on a raspberry Pi and I was wondering if any of you heard of or know if connecting a raspberry Pi with solar assistant software voids the manufacturer warranty of a battery? I have a BSL battery and I need to know if the connection using RS232 to monitor the battery will void the warranty. Battery warranty document https://www.valsa.co.za/wp-content/uploads/2021/04/51.2V-100AH-Warranty-SA-200421.pdf