Overcurrent alarm. but nowhere near max current?

DIY
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1

Hi,

My systems consists of:
1x Quattro 48/3000/35-2x50 120V
2x Pylontech US3000c
2x BlueSolar Charger MPPT 150/35

Everything is on the latest firmware. I noticed that my inverter throws an alert when the well pump turns on. But looking at the reports I pull a max of 1400W. So well below the continuous output, and even further below peak. The error on the display is “Inverter Overload”.

I guess the pump could pull a very high peak load on startup. Does anybody know at what point this alarm gets set?

Bas

2

Try lowering the boost factor. Default is 2.0 and this is often too high for things like air conditioners or well pumps that have a high inrush current at startup. What happens is when the current increases the inverter doesn’t know how much current it needs, and the boost factor is used to tell ot how much current to dump onto the inverter.

1 Like
3

Hi Derrick,

Thank you for the quick reply. I had that already set to 1 (Inverter → Power Assist → Assist Current Boost factor)

Bas

4

Try 0.5. also try toggling dynamic current limiter

5

Will do. I’ve been trying to read up on what that setting actually does. And it’s not particularly clear :slight_smile: It seems to be related at the AC-IN current limit? I’m running of solar only. But it still uses that settings to determine max current?

if Iac > I_ac_in_limit * boost_factor, that alarm shows?

I’m hoping to leave the dynamic current limiter enabled, since I often use a little honda generator (EU1500) for battery charging in winter. When a load in the cabin turns on, it’s nice to not overload the poor little generator

6

You say you’re running on solar only and getting the overload alarm? No ac input? Well that changes things. In that case the boost factor and dynamic current limiter have no effect. If you are getting a overload while inverting that means your inrush startup current is too high. Look into the micro air easy start. They can also be used on compressors and well pumps.

7

Sorry! I should have mentioned that. Yes, completely on battery/solar.
Do you know when that alarm gets set. I assume when the rated current is hit? But only after the rated surge period?

Bas

8

If it is from a known event then don’t stress about it especially if there are other considerations such as your generator.
The only thing maybe to check is if there is a capacitor on the pump that may need attention if it is a new event.

9

Hi,

Will continue to monitor. It’s not on every startup either. Will continue to monitor and see if the frequency of it happening changes

Tx all!