Hello everyone, and thank you for any all helps and responses in advance.
- My home is off the grid.
- Its an AC coupled system, with a SMA sunnyboy 5kw inverter
- I am running a Victron Quattro 48/8000.
- I have 48kwh lead acid battery bank.
When my PV is at very low levels - hard to define a clinical level, but approx sub 300watts - i.e. in the morning at sunrise and evening at sunset, the lights in my home flicker / strobe.
1) I have tried it with old tungsten bulbs and with new LED bulbs - same issue across both.
2) When I increase the load in the house significantly (Over 1.5kw approx e.g. by turning on a heater) the issue resolves itself.
My normal base load/usage in the house is approx 350-450 watts but as you can imagine that is rarely constant.
Obviously I cant be running heaters/using excess loads just to resolve the issues as I live off the grid with limited power reserves.
3) We had the same issue with the fronius 5kw inverter we had in before - we then swapped this out for the SMA sunnyboy - exact same issue / no difference.
4) I have run my lighting circuits through an online UPS sinewave inverter - cures the issue immediately.
Given what I have tried above, have to be left to believe it is the Quattro, generating a poor quality sinewave/poor elecricity supply at low levels...
Is there a know issue at low levels with the Quattros?
(Ive searched the forums before posting - I cannot see anything)
What else can you suggest I attempt to resolve this issue?