Problem with inverter and DC overcharge

Zaschark

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Hello! We’re running a relatively small solar system and recently have begun seeing dc overload faults on our Conext SW 2524 inverter. I’m not even really sure what information to provide or what to ask so I’ll just state what I know and see what someone who knows what they’re talking about thinks.

Charge state used to be on float and now is only on either bulk or standby and will not change

Equalize is set to disabled and will not turn on

Generator (7500) watt will consistently create dc overload

Says recharge level set to 25.1. What does this do? Start or stop recharge at set amount?

Inverter set to 30amp max but we have 70amp total charge controllers hooked up to solar.

Sorry if this isn’t enough to get a clear idea. Please let me know what info is required for advice to be given and I will do my best. We had a friend set up this solar system and he is well.. unreliable. Thank you in advance for any assistance you can give.
 
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Is this an error message on the inverter?
Have you looked it up in the manual?
Can you post the error description from the manual?
 

Zaschark

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Is this an error message on the inverter?
Have you looked it up in the manual?
Can you post the error description from the manual?
Yes it’s an error message on the inverter, the manual is exceptionally unhelpful in explaining the cause of the fault only in explaining that there was dc over voltage
 
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Yes it’s an error message on the inverter, the manual is exceptionally unhelpful in explaining the cause of the fault only in explaining that there was dc over voltage
Have you measured the voltage at the system side dc terminals when the error message is generated?
 

Zaschark

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Is this an error message on the inverter?
Have you looked it up in the manual?
Can you post the error description from the manual?
The manual I just found on line has more detail than my paper one. Curious.
 

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I'm talking about dc chargers.
You probably have your panels connected to a solar charge controller which is a charge source.
The conext inverter/charger contains an ac2dc charger so it is also a charge source.
The generator provides ac power so it is not a dc charge source but may be providing ac power to an ac2dc charger, possibly your inverter.

Just trying to get an idea of your system topology.
 

Zaschark

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We h
I'm talking about dc chargers.
You probably have your panels connected to a solar charge controller which is a charge source.
The conext inverter/charger contains an ac2dc charger so it is also a charge source.
The generator provides ac power so it is not a dc charge source but may be providing ac power to an ac2dc charger, possibly your inverter.

Just trying to get an idea of your system topology.
We have two solar charge controllers and a generator leading to the inverter.

So I followed the directions and read the voltage for the side of the inverter. While faulting, it reads 24. When I clear the fault it reads 29
 

Zaschark

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I'm talking about dc chargers.
You probably have your panels connected to a solar charge controller which is a charge source.
The conext inverter/charger contains an ac2dc charger so it is also a charge source.
The generator provides ac power so it is not a dc charge source but may be providing ac power to an ac2dc charger, possibly your inverter.

Just trying to get an idea of your system topology.
This is while my generator is on
 

Zaschark

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Joined
Nov 22, 2021
Messages
19
I'm talking about dc chargers.
You probably have your panels connected to a solar charge controller which is a charge source.
The conext inverter/charger contains an ac2dc charger so it is also a charge source.
The generator provides ac power so it is not a dc charge source but may be providing ac power to an ac2dc charger, possibly your inverter.

Just trying to get an idea of your system topology.
What I’m trying to figure out is, isn’t there a way to make the inverter regulate the amount of power going in so it doesn’t overcharge the battery bank and cause a fault?
 
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What I’m trying to figure out is, isn’t there a way to make the inverter regulate the amount of power going in so it doesn’t overcharge the battery bank and cause a fault?
Yes it should do this by default?
What chemistry are your batteries.
The inverter/charger is configured with a charge profile we need to find out the parameters and corresponding values of the charge profile.
 

Zaschark

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Yes it should do this by default?
What chemistry are your batteries.
The inverter/charger is configured with a charge profile we need to find out the parameters and corresponding values of the charge profile.
So we have 10 batteries that are all I think lead acid (marine batteries by the looks of them). The solar charge controllers aren’t off unless you count the fact that its night time. I’ve attached what I think the charge profile is
 

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I would expect to see
bulk/absorbtion_voltage=
float_voltage=
Charge cycle being 3 stages is relevant.
I would like to know what the enumeration of those 3 stages is.

If you post a link to the manual I will take a look.
 
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I think those are sealed lead acid but I don't know if they are gel or agm or other.
Can you find a name and model number for the batteries?
 
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