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isolated system with quattro8k, AC and DC coupled chargers.freq shifting from 50.5-52.5hz,off at 53hz.(SMA inverters).at end of day freq stays stuck at 52.7hz through the night, failing to reset to 50hz, battery voltage is now 49,1V 82% SOC. turning on the generator resets the freq, but this is no real solution.suggestions?
just checked the settings,freqshift is from 50.2 till 52.7 float 55.2V
Use equalization (tubular plate traction battery curve) unchecked
Charge curve Adaptive + BatterySafe
Absorption voltage 57.60 V
Float voltage 55.20 V
Charge current 110 A
batteries 24x 2V 1500Ah C10, AC coupled sma tl4000, sb4.0 (limit to 3k) , DC coupled: bluesolar 150/60, 3x makeskyblue 30, 40A modified, venus, BMV700, quattro 8K, 55V automatic fans, battery, room airconditioning at 20degrC
according to the PV assistant the freq should reset at 5.2V below float, or in my case 55.2-5.2= 50V.
still at 49.1V , no reset..
Hi @basreflex, can you please first upgrade your inverter to the latest firmware?
Hi @basreflex
Please read this:
https://www.victronenergy.com/live/updating_firmware:updating_ve.bus_products
If you don't have the equipment or don't feel sure about doing this, ask your installer to update the firmware for you.
@basreflex
Did you manage to get this issue resolved?
I have the same problem with a Quattro 10 and it appears to have started when I upgraded the firmware from 417 to 460 and the PV assistant.
so it's not the firmware, that I did not upgrade yet to. there is another problem in the assistant : when the system is in 52.7 mode throttling the AC coupled power, there is no mechanism to release that power when needed. I had a few temp shutdowns for overload, while the freq was at 52.7 and the quattro was not able to release more power from the ac coupled inverters, as it only can reset the freq based on battery voltage. this is a design flaw that can be improved. the ac coupled regulation technique is quite crappy if you look at the AC voltage amplitude oscillations, when in ac coupled battery charge mode
Hi @Peter-ZMG @basreflex @Phil_Gavin
Did you read this information:
if you believe this is not the reason in your system, what is the site's VRM identifier?
