What happens if the panel draws more than the inverter can output?

[Travis55]

Let's say you have a split phase setup of two inverters such as MPP LV6548. Together they output somewhere around 100-110 Amps. What if you had a 200A panel and the AC kicked on or something and you drew above that inverter output amperage. What would happen?

 

[Brucey]

Let's say you have a split phase setup of two inverters such as MPP LV6548. Together they output somewhere around 100-110 Amps. What if you had a 200A panel and the AC kicked on or something and you drew above that inverter output amperage. What would happen?

They'll shutdown.

 

[Brucey]

Or your ac input breaker(s) may trip.

 

[Mattb4]

If your load is greater than your inverter can supply it will go into overload condition. Sometimes this is delayed a bit as your inverter has a leeway ability for surges. If it did not have a protective function your loads would experience a Brownout condition as the output voltage dropped.

ETA: Incidentally if your batteries can not keep the DC voltage high enough to maintain the inverters AC output voltage you will have a low voltage shutoff of inverter under heavy load.

 

[Travis55]

Thanks all, what's the best way to monitor the amperage that the panel is drawing, does the inverter screen(s) show this, or is there something I put inline that can show the current?

 

[dougbert]

Thanks all, what's the best way to monitor the amperage that the panel is drawing, does the inverter screen(s) show this, or is there something I put inline that can show the current?

I installed these above my panel

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Frequency: 45.0Hz – 65.0Hz. Display: HD LCD color display. AC Current: AC 0-100.0A, the current resolution is 0.01A. Accuracy: 1%±2 words. Power Factor: 0.00-1.00PF.

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