Charging disabled ?

11 minutes ago, JNock said:

I didn’t have time to mess with it yesterday. Not sure if it’s a coincidence or not but it did have the problem after I changed some of the charge settings. I just lowered the bulk charge down to 48.8 volts, float is matching my victron charge controller at 55.2 maybe I’ll lower that too 

OK, that'd make a bit more sense.  Likely has to do with the caps being on the wrong side of the current sensor, and a low threshold being problematic...down at 48.8v charge, Throttle would pretty quickly fall to 0%, making the error possible. 

Guess I might need to revise the code threshold slightly...

1 hour ago, Sid Genetry Solar said:

OK, that'd make a bit more sense.  Likely has to do with the caps being on the wrong side of the current sensor, and a low threshold being problematic...down at 48.8v charge, Throttle would pretty quickly fall to 0%, making the error possible. 

Guess I might need to revise the code threshold slightly...

How high should I set the bulk charge to with the agms?

Just now, JNock said:

How high should I set the bulk charge to with the agms?

Entirely up to your system needs; the Xformer Volt error is something I need to fix in the code.  It's there for a purpose, but it's being problematic 😉

2 hours ago, Sid Genetry Solar said:

Entirely up to your system needs; the Xformer Volt error is something I need to fix in the code.  It's there for a purpose, but it's being problematic 😉

Lucky I’ve been generating 13-16kwh of solar every day so in a perfect world charging won’t really be necessary 

2 hours ago, JNock said:

Lucky I’ve been generating 13-16kwh of solar every day so in a perfect world charging won’t really be necessary 

Just installed my new LFP bank which gets similar figures.

Before this the battery bank was too small to ever get near those kind of daily numbers... What's your system like, if you don't mind me asking? I'm in a bus conversion, so similar use case to that of an RV. The talk of Rev. C boards potentially having dual input voltage support really has my attention...

Just now, kazetsukai said:

The talk of Rev. C boards potentially having dual input voltage support really has my attention...

It's already on the prototype boards...I'm currently trying to see if I can customize the relay for a physically smaller one (don't need 120A capability!)  But this is a definite feature for Rev. C.

18 minutes ago, Sid Genetry Solar said:

It's already on the prototype boards...I'm currently trying to see if I can customize the relay for a physically smaller one (don't need 120A capability!)  But this is a definite feature for Rev. C.

120A would last forever though, even if it is large and expensive. 

At least it won't be like the crap 30A automotive relay that Inergy put in the Apex portable power station that melts because it can't handle switching the 30A max charge rate that they have on the internal solar charge controller.  That being said I replaced it for a buddy and even the 50A automotive relay eventually pitted the contacts and melted after several months of service because they weren't designed for the task and have nowhere to dissipate the heat other than the air moving through the chassis.

Price isn't the issue...the biggest issue is that the coil current basically overloads the on-board power supply on the control board.  (Yes, it's a latching relay, so this is a brief spike.  But still...over 1A coil current @ 12v?)  Also a sizable issue (pardon the pun) is that it's so tall it'll hit the WiFi board in the current chassis.  I really don't want to increase the chassis height just for a relay that's oversized anyhow.

On top of all that, this relay will never see any inrush current upon switching: it will only switch when the main 2-pole 70A relay is OFF, stopping all power flow.

Planning to also make the main power relay zero-inrush via firmware tweaks...that should make 'em last a really long time.  Yes, both are latching relays, removing the coil heat AND the constant lost power to hold 'em on.

1 hour ago, kazetsukai said:

Just installed my new LFP bank which gets similar figures.

Before this the battery bank was too small to ever get near those kind of daily numbers... What's your system like, if you don't mind me asking? I'm in a bus conversion, so similar use case to that of an RV. The talk of Rev. C boards potentially having dual input voltage support really has my attention...

 

Oh i am too. Currently I’m using 12 138Ahr agm batteries out of a hospital backup system. I believe I generate enough power to add a 4th bank. I use that victron dc-dc charger to keep 2 house/starting batteries charged at all time. Victron makes some really cool stuff. I have the panels run series parallel configuration,  generally running at about 100-110 volts down to the 48v banks. 

This is what’ll happen sometimes. 

1 hour ago, JNock said:

This is what’ll happen sometimes. 

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That's XFormer Polarity....a considerably different error than XFormer Volt.

You said this happens during charge????

9 hours ago, Sid Genetry Solar said:

That's XFormer Polarity....a considerably different error than XFormer Volt.

You said this happens during charge????

It happens randomly sometimes but most of the time it’ll happen when I connect shore power 

9 minutes ago, JNock said:

It happens randomly sometimes but most of the time it’ll happen when I connect shore power 

Admittedly this is a first for errors of this type...it's there in case the transformer's wired with reversed polarity, in an attempt to prevent blowing the FETs.

If you don't have anything else exciting to do, could you check the OUT -> Diagnostic -> Load Level line, and maybe see where it "holds" at no load, with loads, with AC input (but no charge), etc., etc.?  Might give me a clue or 2.

...I should clarify, the transformer is wired forwards in your inverter.   Just the error trigger might be a tad sensitive.

47 minutes ago, Sid Genetry Solar said:

Admittedly this is a first for errors of this type...it's there in case the transformer's wired with reversed polarity, in an attempt to prevent blowing the FETs.

If you don't have anything else exciting to do, could you check the OUT -> Diagnostic -> Load Level line, and maybe see where it "holds" at no load, with loads, with AC input (but no charge), etc., etc.?  Might give me a clue or 2.

No load it’s 0

600-800 watt it’s around 80

Ac pass through is 25

it won’t charge because the batteries are at 51v since I got 15kwh of solar today