StephanT

thanks Izak!

in order to try and get to better numbers for my Discharge limits, I decided to do a discharge test...
 
just a quick recap:
  setup: infini3kP with 4x 200Ah Sonic Gel batteries.
  load: all house lights, some house appliances like Fridge/freezer, TV, internet etc.
 
purchased and hooked up a Victron BVM-700, configured for 200Ah batteries..
 
Grid supply OFF.. and here we go!

the Yellow are the values I got from the BVM700, the green just the Battery voltage read off the inverter LCD, and the blue are the values from the SolarPower app. (Some values I didn't log right from the beginning)
 
 
Here is a graph of the BVM700 info:

Note1: I scaled the Battery power by a factor 10 for better visualisation... (as you can see the average Battery power was around 772W, compared to the average load power of 674W)
 
 
And for interest sake, I thought to look at the difference between what the Inverter is measuring vs. what the BVM700 is measuring:

There's about a 0.5V to 0.6V difference...
 
 
From the above I think I'll set the "Battery cut-off discharging voltage when Grid is unavailable" to 48.0V, or maybe 47.9V for that matter...
 
Any thoughts/help appreciated?
 
 
Once I've got automated logging going (wink-wink), I'll do some more discharge logs at different loads - one lower and one greater...

Come on Izak, write us some python code for our infini's... ;-)

Here are a few lines during different load sheddings:
 
QPIGS (000.0 100033 00.0 0002.6 230.5 00559 50.0 002.4 020 393.8 393.8 050.0 ---.- 057 00120 00526 ------ 377.4 ---.- ---.- 036.0 D---110001
QPIGS (000.0 100046 00.0 0002.8 232.4 00603 49.8 002.5 022 415.8 415.8 050.5 ---.- 058 00645 00557 ------ 406.0 ---.- ---.- 037.0 A---101001
QPIGS (000.0 100131 00.0 0010.4 231.3 02401 49.9 010.3 080 452.9 452.9 054.7 ---.- 100 02572 02270 ------ 297.4 ---.- ---.- 044.0 F---101001
QPIGS (000.0 100034 00.0 0001.6 230.3 00287 50.1 001.2 012 460.1 460.1 054.4 ---.- 069 01845 00253 ------ 416.2 ---.- ---.- 038.0 A---101001
All documentation that I could find on the web says it should be grid current, but the actual values deny that. In the above cases it was impossible to draw current from the grid. Even the example in my previous post had 6.2A, but I'm pretty sure it was not coming from the grid. The two currents are not the same but normally not too far from each other.
 
Interesting that even during load shedding, it thinks it can draw a few watt from the grid.
 
About where I got the info, capturing the serial streams and searching the web for those keywords. I have sent a few emails to VoltronicPower, but have not received any answers back. I have emailed MPPSolar (where the Ausies got their info from), they replied, but said I should contact my supplier.