Sol-Ark Manual "Do not connect the grid to the load output breaker" What would Happen?

AmpLee

Solar Enthusiast
Joined
Jun 1, 2020
Messages
43
Just out of curiosity of seeing this big red notice in the manual, what would happen if the Sol-Ark's loads out breaker would be fed into a main service panel instead of a dedicated sub-panel?
 

schmism

Solar Addict
Joined
Jul 13, 2020
Messages
1,017
Location
Central IL, USA
There is at least one post I know of that has done this. Results were fried inverter to constantly kept tripping the feedback breaker resulting in no useful power transfer.

In short nothing good.
 

MichaelK

Photon Sorcerer
Joined
Mar 21, 2020
Messages
1,341
If the panel has grid-power, the two waveforms would not match up, and the inverter would go poof.

If the panel does not have grid-power because of a power blackout, you are energizing a line that runs out to the street pole, and you are creating a life-threatening situation to a lineman trying to restore power.

So, never do this without the proper either/or switching breaker that isolates the inverter from the grid.
 

RCinFLA

Photon Sorcerer
Joined
Jun 21, 2020
Messages
1,028
High freq hybrid inverters are not bi-directional in the same way a LF hybrid inverter is. A LF hybrid inverter can slide between push and pull continuously with a slight tweak to PWM duty cycle. A high freq inverter makes a hard mode switch between push and pull and must be synchronized to applied AC input to run the PWM output bridge as a rectifier for charging.

A LF hybrid inverter cannot stand application of unsynchronized AC applied on ACout either if inverter is already running. It will immediately shut down inverter operation to save itself.

A LF hybrid inverter has the advantage of battery taking any sudden surge back. A HF hybrid inverter has just a HV DC capacitor to absorb any backfeed surge.
 
Top