Hi,
I’ve just had a system as above installed and have a strange issue in that the minimum Battery level should be 4% but it seems to be dipping to 2%…It hasn’t dropped below this as i’ve been in fear of it going totally flat and i’ve heard it would need the installer to visit if it drops to 0%?
Is that correct and is there anything I can do to stop this?
Thanks
Scott.
4% is the battery reserve level, but sometimes the battery can drop below this. I have seen 2 or 3% sometimes on mine, but equally I have seen it stop discharging at 5 or even 6%.
Bear in mind that the percentage SoC is an estimate by the Battery management system of the state of charge based upon the battery voltage. It is not something that can be precisely measured.
In normal operation I wouldn’t worry about it, on a new system your installer will have done a calibration of the battery and it might just be some residual sorting out from that that is occurring.
If the inverter thinks the battery level is too low it will initiate a grid charge itself to get back to a safe level.
ahhhh so it won’t just “die” and ask for installer intervention. It will force a 100% grid charge got it.
No its not as severe as that.
If the battery management system detects that the battery level is too low it will initiate a charge to bring it back to “normal” levels, so it might charge it to 4 or 5%. The battery voltage (which is how the BMS works out the SoC %) can be affected by temperature, so its usually in colder weather that you might see such adjustments happening, but these are fairly rare.
If you were to leave the battery powered on, but not charging from grid or solar for a long period of time then it could get too low and it goes into hibernation mode. GivEnergy can kick it out of this mode to self-charge, or if it gets really really low then it might need an installer to intervene to recharge it up a bit using a giant battery booster pack. But things like this happen if say you’re having house renovations and the inverter is powered off for months.
Great thanks for the update!
Next problem is occasional RCD trips…but I think will get and electrcian to change the trips to RCBOs to help identify where the issues from.
yes definitely do. I used to get occasional RCD trips from the EPS circuit on my inverter, changed them all to RCBO’s and not a single false trip
make sure you get the right type of RCBO’s. Type A I think for DC output