question

Riaan Barkhuizen avatar image
Riaan Barkhuizen asked

Quattro and Solis

Hi There,

Im having trouble with an ess system. When there is a power failure in the early afternoon, there is also still plenty solar power available. The problem is that freq shifting is not cutting back power fast enough on the gridtie inverter leading to overvoltages on the battery.

The setup consists of 10kWh lithium pack with 8kVA quattro and 4.4kWp of solar panels on a 4.6kVA solis. The system uses a ac current sensor to monitor pv production.

I have already tested with higher freq values, but still response times are too slow.

Is there a specific grid code which will work better. Currently i have nrs 097 selected.

Any suggestions on what im missing?

Initially power on the gridtie cuts back nicely, but then ramps up and continue to produce at max power until the battery or invertter switches off.




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Chris avatar image
Chris answered ·

Can depend on the grid setup chosen as to what features are available.

However..... ive just come across a document by Solis for 50 /60Hz frequency derating control.

“Gen 50” or “Gen 60”

The default settings for “Generator 50” are Fstart – 51Hz (Start point of derating from 100% Prated, adjustable from 50Hz to 54Hz) Fstop – 52.7Hz (End point of derating to 0% Prated, adjustable from 50Hz to 54Hz)

May need a firmware update, but looks like its now properly supported.....

Could be what you need ?

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Riaan Barkhuizen avatar image Riaan Barkhuizen commented ·

Thanks Chris, sounds promising, any idea where one might find the latest Solis firmware?

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