24 volt LifePo4 system with giandel inverter intermittent failure

[gives11]

Is the inverter running now?

No.

 

[John Frum]

No.

Are any of your pure dc loads running?
Can you test?

 

[gives11]

Are any of your pure dc loads running?
Can you test?

Everything is off. No power output, ie no current. When I pull the fuse out no volt or amps.

 

[John Frum]

Everything is off. No power output, ie no current. When I pull the fuse out no volt or amps.

What fuse?
If nothing is running lets see if we can make the dc loads run.

 

[gives11]

Lights, water pump. All 12 volt stuff works.

But no 24 v stuff works. nothing works via the inverter. no plugs.

 

[John Frum]

Lights, water pump. All 12 volt stuff works.

But no 24 v stuff works. nothing works via the inverter. no plugs.

The only 24 volt loads are the inverter and the buck converter, confirm?
Is the solar charge controller providing current at this moment?

 

[gives11]

The only 24 volt loads are the inverter and the buck converter, confirm?
Is the solar charge controller providing current at this moment?

Yes correct

 

[John Frum]

Yes correct

I asked 2 questions please answer both.

 

[gives11]

I asked 2 questions please answer both.

The only 24 volt loads are the inverter and the buck converter, confirm?
yes
Is the solar charge controller providing current at this moment?
photo attached of what I get on voltage meter.
photo of solar controler readings

 

[John Frum]

The only 24 volt loads are the inverter and the buck converter, confirm?
yes
Is the solar charge controller providing current at this moment?
photo attached of what I get on voltage meter.
photo of solar controler readings

Please disable the solar charge controller and see if the dc lighting stays on.
Then report results.

 

[gives11]

Please disable the solar charge controller and see if the dc lighting stays on.
Then report results.

when I disable solar charger lights etc don't work.

 

[gives11]

when I disable solar charger lights etc don't work.

 

[John Frum]

Are you running the buck converter off the scc load port?

 

[gives11]

Are you running the buck converter off the scc load port?

yes I am

 

[John Frum]

yes I am

Well then, that won't tell us what I want to know.
Can you enable the load port, we expect the dc lighting to come back on.
The remove one of the solar panel leads so that the solar charge controller does not recieve any energy from the panels.
See if the dc lighting goes out in that scenario.
Then report back.

 

[gives11]

done that. No income from panels. dc light stays on

 

[John Frum]

done that. No income from panels. dc light stays on

Try to power up your inverter and see if the dc lights go off.
The report back.

 

[gives11]

inverter won't come on
and dc lights stay on / don't go off

 

[John Frum]

inverter won't come on
and dc lights stay on / don't go off

What is the dc voltage at the inverter dc terminals as measured by your reference dvom?

 

[gives11]

26.5v