Axpert switching off and on by itself

[Aldre]

Hi all,

 

I have a client who has 2 x 4KW Axperts in paralell with 24 x 2v flooded batteries and 12 x 250wp poly modules. Installation was done in December 2015 and of late the inverters are switching off and back on after a second or two. They mainly experience this at night. He says he doesn't believe that the inverters are overloading as they stagger the loads, but he and I will do an over load test. Anyone who may know what else (i.e. other than an overload) may cause the inverters to switch off and on?

Many thanks,

Aldre

[___]

They mainly experience it at night? Check battery voltage... it might drop too low, for whatever reason :-)

[Arandoza]

Don't the axperts have an energy saving mode? If the load

Is too low, they power off to save power?

Maybe confirm this is also disabled so it won't power off.

[Coulomb]

I believe the power saving mode is disabled when you have paralled inverters.

[Guest]

I had the same problem with Axpert. This is the power saving setting that switches the unit off although some appliances is drawing current.

I think the loaf current sensing is not to accurate.

I have an Arduino setup to measure the actual batt and pv currents and voltages and logs them. I found the inveter is not that accurate though.

[Guest]

2 hours ago, vandyh said:

I have an Arduino setup to measure the actual batt and pv currents and voltages and logs them. I found the inveter is not that accurate though.

Pray tell us more of the device and why the inverter is not that accurate?