Joe BoyKey
Watts, Watts, more Watts
email Pierre @ 'SolarAssistant' <info@solar-assistant.io>Thanks, but I do understand its supported, I'm curious what stats that Solar Assistant actually uses from the Smart Shunt. Is it just the SOC?
email Pierre @ 'SolarAssistant' <info@solar-assistant.io>Thanks, but I do understand its supported, I'm curious what stats that Solar Assistant actually uses from the Smart Shunt. Is it just the SOC?
How would Solar Assistant connect to both the inverter and a smart shunt?Does anybody use the Victron Smart Shunt with Solar Assistant? I'm curious if it only uses the SOC info, or if Solar Assistant also refers to it for Charge/Discharge current?
Uses a separate usb cable to a different port on the Pi running SA.How would Solar Assistant connect to both the inverter and a smart shunt?
I'm using the "emulated BMS" option although I have my doubts about its accuracy on SOC value.
For example, yesterday (a crappy rainy day all day for solar PV) the SolarAssistant battery power chart reported a total discharge of 1415Wh, and a total charge of 205Wh, so that would suggest at loss of at least 1210Wh from the battery for the day.
My battery nominal capacity is 18200Wh, so that suggest battery SOC should be reporting as 1-(1210/18200) = 93%. Yet the SOC reading never went below 97% and by evening and this morning it was back to reading 100% SOC despite no overnight charging.
Ah, makes sense.Uses a separate usb cable to a different port on the Pi running SA.
I've emailed Pierre at SA to see what he makes of it but I'd have thought the coulomb counting of an emulated BMS would track the rise and fall similar to the accumulated energy line, just expressed relative to the battery's nominal capacity and perhaps also some allowance for charging inefficiency.
When the charge/discharge rate goes below 0.01C the software starts to use the "Voltage at 30% SoC" and "Voltage at 80% SoC" settings to adjust the SoC slowly over time. For your system 0.01C is 18.4kW x 0.01 = 0.184kW which is just over 3 amps. Most likely the charge/discharge rate was low and then this made SoC inaccurate. I plan to remove this mechanism from the emulated BMS as it seems to only make it less accurate.
Got my cable last night. Gonna hook it all up today and find out more info.Does anybody use the Victron Smart Shunt with Solar Assistant? I'm curious if it only uses the SOC info, or if Solar Assistant also refers to it for Charge/Discharge current? Right now, Solar Assistant does not add in the idle consumption of the inverters, giving you sort of a false Load value. I also have a 48v->12v converter that has varying load values and is not reported through solar assistant. In my case, I could have 200-300 watt load that the Smart Shunt reads, but solar assistant is reporting 0w.
I ordered the VE Direct cable, so I'm curious.
The LV6548 has power management, but some of it is hit and miss with bugs, so be weary when changing settings, I suggest you compare with the actual control panel.FYI - I got excited about earlier posts on this this thread about Growatt, so I bought a license and set up a pi3.
Caution 'support' for Growatt is status only. There is no ability to change settings. And the Power management tab says not supported.
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On my clone PIP inverter, via Solar Assistant I can change it between Utility First, Solar First, or Solar/Battery/Utility, the same settings as the inverter panel provides.My favorite is the ability to change it to Solar/Battery/Utility or Solar/Utility/Battery and Utility Only. You cannot do this easily from the actual control panel.
Yes I have mine set to Only Solar as well. I guess I will have to catch it in the act and try and see if there is actual amperage being drawn from the grid. My bet is the "Grid Input" is innacurate or not actually measure and is just a calculated equation based on other inputs.On my Growatt SPF-6000T-DVM setting 14 determines charge priority, I select OSO for Solar charging only, if i select SNU - Solar and Utility will supply load and charge Battery, joe. Edit I see what your talking about now, I don't think Solar Assistant reports Grid correctly anyhow.
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I would start by ensuring you are on the latest release. The changelog for the latest version lists fixes for both LV/LVX inverters and Solar first mode, both seem like what you are describing: https://solar-assistant.io/help/updates/changelogYes I have mine set to Only Solar as well. I guess I will have to catch it in the act and try and see if there is actual amperage being drawn from the grid. My bet is the "Grid Input" is innacurate or not actually measure and is just a calculated equation based on other inputs.
You are correct - @Lt.Dan - under the configuration tab scroll down and see if there is a "update available" click it and wait, it will tell you to update and reboot, once you click that wait up to 5 min for it to come back online. Posted about it 2 days ago here, Joe.I would start by ensuring you are on the latest release. The changelog for the latest version lists fixes for both LV/LVX inverters and Solar first mode, both seem like what you are describing: https://solar-assistant.io/help/updates/changelog
Be sure and wait for text - update and reboot, the wait, wait, wait... about 5minUpdating now.. I was behind on one update. Wish me luck!