Peak-shaving vs Grid Current limit in ESS system

Q&A and troubleshooting
,
1

Hi, can someone better explain what is the difference between setting up “Grid Current Limit” at inverter settings OR enabling “Peakshaving” on ESS settings?

2nd question: If I need to power boost load at AC-IN side, can any of these 2 features be used? Or only AC-OUT side is supported?

Thank you in advance.

2

The answer for peak shaving and ac in depends on whether you have a grid meter or not and how you have set up your battery.

See the article.

The grid input limit is a continuous limit (never to be exceeded), peak shaving is short term ‘spike load support’. You can set this lower than the grid limit. The grid input would then be the fall back if battery limits are met.

(The limits apply to both - ac in only works if you have a grid meter). And it works well if the grid meter is not slow.

1 Like
3

Thank you LX so much for excelent explanation!

So in the real case example:

  • there is a grid circuit breaker limit at 25A per 3phase
  • energy meter VM-3P75CT installed at the grid input side
  • house load connected to AC-OUT
  • EV DC charger (24kW) connected to AC-IN

I could configure:

  • “Grid Current Limit” to 25A
  • “Minumum SOC” to 50%
  • “Peak shaving” to Always
  • “Limit System AC Import Current” to 24A

Note: Since Feed-In is disabled, I can keep “Limit System AC Export Current” disabled, am I right?

I wonder which load would be prioritised, at AC-IN or AC-OUT when it comes to ‘spike load support’..

Thank you.

4

Sure. It is irrelevant.

I would imagine ac out before ac in but i can’t day for sure. The load type and some other factors can change which happens first.

5

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.