Does anyone have one fitted to a Pylontec 48v system
If your Pylontech batteries are already reporting current and state of charge to a GX device, I’d first check what extra information you want from the Lynx Shunt. It can measure the total battery-bank current and count amp-hours, but it doesn’t replace the batteries’ BMS or its charge limits. Its main appeal is integrating that monitoring into a Lynx busbar arrangement, rather than being something every 48V system needs. For useful readings, all charging and load current needs to pass through the shunt, with no negative connections bypassing it. Are you trying to sort out inaccurate state-of-charge readings, or planning the layout for a new install?
I’ve been running my Victron system with several battery banks for several years now. The initial setup was also without a shunt. I soon realised that all the SoC estimates from the BMS or similar are actually completely unreliable. I then retrofitted a shunt. That involves additional installation work, just when you think you’re finished. With the benefit of hindsight and experience, I would ALWAYS install a shunt from the outset. Regardless of the battery system.
I feel that I have all the info I need from the Pylontec BMS and my system is already built so I don’t think I need anymore info.
Thank you @Sarowe1990 I have no way of knowing if my Soc data is accurate so I just have to believe it, I didn’t have an issue with Soc other than if it gets very low <20% the batteries seem to drain a lot slower before grid power kicks in, but thanks again for your insight.
I don’t want to get into a big discussion about it…just two more comments.
-For normal battery operation, as long as you use it until it’s simply empty, it may not matter how high the SOC is. But from the moment you start working with dynamic tariffs, forecast-based charging or DESS, it’s ESSENTIAL to know how many kWh are in the storage system.
-In my experience, the SOC calculations outside a shunt are ALL not really accurate. One fundamental problem is that these calculations are all actually based on the BMS data, and the BMS doesn’t detect small, continuous currents. That may work for a single battery, but as soon as currents are split across several batteries connected in parallel, the problem gets bigger and bigger.
Otherwise, everyone has to decide for themselves what they do. I made mistakes when I first set things up, and my main interest is always to help others avoid those mistakes.