SauRoN's SomeWatt Solar Install

so do we need to amend the voltage settings for the batteries if we want to go below 14%?
 
wingnut771 said:
@SauRoNZA

What are your charge settings on the inverter?
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5f2052393449a7d9c39e76a4a1a91676.jpg
 
Mike Hoxbig said:
I have the same issue as @SauRoNZA, same battery except I have 2 in my bank. Also shuts down at 14%. Going to try and set the voltages manually when the clouds clear up here, and see what % it corresponds to. Guess it's a process of trial and error.

With that said, this will only be for exceptional circumstances. Under normal conditions I don't go below 20%, mostly because I don't want any issues should I need to put in a warranty claim...
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Yeah I mean this would purely be if I have grid loss and my usual 20% limit.
 
According to the Deye manual (so should be the same for Sunsynk), restart basically switches over to grid. If no grid, then it keeps running on inverter...
 
I put in

Shutdown : 44
Low : 45
Restart : 46

Let’s see how it goes but my load shed this afternoon will be at 40%+ so unlikely to go do low.
 
Mzezman said:
after a battery-forced shutdown that's the % the inverter will restart at

so if shutdown is 8% and restart is 15%, only when the battery gets to 15% will the inverter restart
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Now that makes a whole lot of sense.

Why the **** didn’t they call it “Startup” then.
 
Mzezman said:
after a battery-forced shutdown that's the % the inverter will restart at

so if shutdown is 8% and restart is 15%, only when the battery gets to 15% will the inverter restart
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That makes more sense. Their manuals are written in Engrish then...
 
wingnut771 said:
Can you not use voltages instead of percentages?
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Yes but then you have to switch to AGM.

That’s the entire problem it seems the Sunsynk even when set to Lithium adheres to the low threshold modes set via Voltage.

I mean logic says based on that you could just put them at their lowest values possible and the BMS will then be in control but not quite willing to test it.

Will drop it one volt at a time.
 
SauRoNZA said:
Yes but then you have to switch to AGM.

That’s the entire problem it seems the Sunsynk even when set to Lithium adheres to the low threshold modes set via Voltage.

I mean logic says based on that you could just put them at their lowest values possible and the BMS will then be in control but not quite willing to test it.

Will drop it one volt at a time.
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My Axpert/Mecer is set using AGM settings sadly as there is no comms cable for the ZTE batteries, but the 20% was set at 47v from what I can see in the settings.
 
SauRoNZA said:
Yes but then you have to switch to AGM.

That’s the entire problem it seems the Sunsynk even when set to Lithium adheres to the low threshold modes set via Voltage.

I mean logic says based on that you could just put them at their lowest values possible and the BMS will then be in control but not quite willing to test it.

Will drop it one volt at a time.
Click to expand...
I think the BMS will cut out at 42V which is still only 2.8V per cell. LFP cells cut-off is 2.5V so I see Dyness are being conservative.
 
Restart is the battery voltage or percentage where the inverter recovers from a shutdown state. Shutdown happens when a particular battery voltage or percentage is reached. It is not totally shut down, it is basically in a standby state. In the Sunsynk inverters, the screen goes off, and it is able to charge batteries. When the batteries are charged to the restart value, the inverter "restarts" i.e. it resumes normal operation.

Why are you using AGM values vs battery comms?
 
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