Hi, I am a newbie but trying to get more self educated  . I have 2 Axpert 5 KW invertors that are configured to run in parallel with two Hubble X100-48 batteries along with a 16 panel solar array on my roof 

I have invertors and batteries connected to a PI running ICC software . 
 

Right now everything in my house is connected to the invertor output except my two geysers which are still fed direct by grid 

my installer configured my SOC settings “ to grid “ at 52 and “ to SBU “ at 80

i have no idea if this is optimal or not and also don’t know what conditions need to be in place for my battery to charge above 80% . My charger source priority is set to “ solar first “ 

i notice on this forum that many people show SOC settings much lower than mine ( eg . 25 and 35) and would love some feedback and recommendations .  My consumption through the invertor late at night and until 6 in the morning averages around 400W ( excl geysers) . After 6 , my irrigation pump starts , pushing consumption up to about 1500-1800 W or so ) . 
 

I wish that my invertors were smart enough to know when outages were going to happen ( eg . By reading data off the ESP App ) because if I set the SOC numbers  low , how do I know there will be enough battery capacity left to power the house especially when I am not getting power from solar eg . 4am outage for 2-3 hours 

 

also , as I mentioned , right now my geyers are on grid . I have not connected them to the invertor ( which would be nice to leverage solar powering them during the day because I can’t control when an  essential item like ovens comes on while geyers are also heating pushing the invertor to its max capacity . I have seen comments on “ non essential circuits “ but I don’t think I have that on my Axpert’s 

 

Thank you for your feedback and input . I hope I submitted this in the right topic area . 

 

 

 

Edited December 16, 20222 yr by davidmasa
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This setting seems like a reasonable compromise between competing priorities:

- Some cycling of the battery down to at least 50% so you can make some use of stored solar energy

- 50% reserve as a contingency for loadshedding

- Running on grid up to 80% so you have better chances of getting your battery charged regardless of the weather

- A remaining 20% so the solar PV also has more chance to do some work.

Personal take, you might find this works for you, but it's also very likely that as you go along you'll tweak it to suit your particular needs as shortcomings become apparent. As a very wise person on this forum said not so long ago, with loadshedding it's almost impossible to keep a single setting for all circumstances.

 

Also, looking at this, your 400W baseload over 10-12 hours at night will take your battery down to around 50% and as per your settings, the irrigation pump in the morning will most likely run off the grid most of the time, hardly off battery. Maybe it makes no sense to run it at any other time of day, but there also won't be much solar power to support that pump in the morning either. Might have been interesting if you could at that time set the battery to deplete a further 20% of capacity to run irrigation for an hour or so before the sun gets higher. No idea if this is possible to set, though would be do-able on a Sunsynk.