Posted January 4, 20232 yr Recently I have noticed that when power is restored after loadshedding that my inverter would go in safe mode and gives a error 08--Bus voltage to high--I have monitored the utility power when it comes back and voltages of up to 350VAC was measured for about 15 seconds then drops rapidly to 90VAC---Surge protectors are installed but it only helps with a spike but not a constant high/low voltage--Any suggestions pleaseĀ
January 5, 20232 yr This post was recognized by Energy-Jason! PsyWulf was awarded the badge 'Helpful' and 50 points. On 2023/01/04 at 5:49 PM, zs1ssm said: Recently I have noticed that when power is restored after loadshedding that my inverter would go in safe mode and gives a error 08--Bus voltage to high--I have monitored the utility power when it comes back and voltages of up to 350VAC was measured for about 15 seconds then drops rapidly to 90VAC---Surge protectors are installed but it only helps with a spike but not a constant high/low voltage--Any suggestions pleaseĀ You get High/Low voltage timer reset breakers that can "delay" returning after any voltage anomaly
January 5, 20232 yr 28 minutes ago, PsyWulf said: You get High/Low voltage timer reset breakers that can "delay" returning after any voltage anomaly Perfect answer right here, many places will have some kind of voltage monitor you can install before the inverter to cut it off from mains until the voltages stabilize. If you are looking for a cheaper option, since most DIN voltage devices can be a little pricy, you can also use a high current timer. I have just set a 5 minute delay before connecting to the grid and I haven't run into any issues thus farĀ š
January 5, 20232 yr 35 minutes ago, PsyWulf said: You get High/Low voltage timer reset breakers that can "delay" returning after any voltage anomaly Just ensure you buy the model that can supply at least what the inverter can supply or higher. The fridge type have a too low current.Ā
January 5, 20232 yr Best solution currently is a contactor with a over/under voltage relay. This will disconnect the supply if an under or overvoltage condition is present.Ā I am going to install such a system on a farm. They lose 1 phase and it creates havoc with fridges.
January 5, 20232 yr On 2023/01/04 at 11:49 AM, zs1ssm said: Recently I have noticed that when power is restored after loadshedding that my inverter would go in safe mode and gives a error 08--Bus voltage to high--I have monitored the utility power when it comes back and voltages of up to 350VAC was measured for about 15 seconds then drops rapidly to 90VAC---Surge protectors are installed but it only helps with a spike but not a constant high/low voltage--Any suggestions pleaseĀ Is there a safety code setting on your inverter?Ā Mine (Goodwe) has different codes for different territories. In the default mode it seems to accept whatever is coming from the grid as long as it's 50Hz.Ā If I run it with settings for SA then it monitors the grid but will disconnect (or not reconnect) if grid voltage is too high or too low.Ā See this screen shot. Load shedding recently ended, but grid voltage is low. The inverter sees that voltage, but hasn't reconnected and continues to put out 230ish V AC.Ā At some point (around 200V) the inverter will reconnect and match its own output with the grid.Ā High voltage is not a problem where I live.Ā Ā Ā
January 5, 20232 yr 5 minutes ago, Bobster. said: Is there a safety code setting on your inverter?Ā Mine (Goodwe) has different codes for different territories. In the default mode it seems to accept whatever is coming from the grid as long as it's 50Hz.Ā If I run it with settings for SA then it monitors the grid but will disconnect (or not reconnect) if grid voltage is too high or too low.Ā See this screen shot. Load shedding recently ended, but grid voltage is low. The inverter sees that voltage, but hasn't reconnected and continues to put out 230ish V AC.Ā At some point (around 200V) the inverter will reconnect and match its own output with the grid.Ā High voltage is not a problem where I live.Ā Ā Ā When using any inverter that can be used as grid tied one must use a grid code accepted in the country and that will dictate the borders for volts, Hz etc. Aus seem to have stricter rules to be adhered to than Eur for instance. I see a number of grid codes available that were not some 3 years ago.Ā
January 14, 20232 yr On 2023/01/04 at 12:49 PM, zs1ssm said: Recently I have noticed that when power is restored after loadshedding that my inverter would go in safe mode and gives a error 08--Bus voltage to high--I have monitored the utility power when it comes back and voltages of up to 350VAC was measured for about 15 seconds then drops rapidly to 90VAC---Surge protectors are installed but it only helps with a spike but not a constant high/low voltage--Any suggestions please @zs1ssmĀ Have a look at the below post touching on the same subject. Cheers. Ā
January 17, 20232 yr Author Can someone tell me where to get a hi/low voltage timer--I am near Mosselbay ? cheers Ā
January 17, 20232 yr You can contact most Electrical suppliers. You are looking for a Over/under voltage relay. I will rather install that with a contractor than a delay on timer. It doesn't mean waiting for to timer to energize the contactor that the voltage will be within specs.
January 25, 20232 yr Is this not needed if your inverter has under/over voltage disconnect and a delay timer built in?Ā
February 5, 20232 yr Yes , i know this is dumb , but so far it seems to work fine for me. I always make sure my electric kettle is on - powered from mains BEFORE the inverter , the 2+kw resistive load seems to help clamping incoming spikes after the power comes on after loadshedding.Ā Power comes on , kettle starts to boil , make a cup of , and the rest of the boiling water goes into the thermos flask. So no real wastage of boiling the kettle.Ā Any real sparkies free tell me i'm an idiot , and that doing this is helping boggerall .... in that case , please give a better , cheap solution.
February 6, 20232 yr I had the case in the Strand that the grid tie inverter I used would not connect as the line voltage was above 250V - think it was around 253V . Had to report it to COC and they send out their electricians to come and measure the incoming voltage at the pole . Then they got the Line electrician to tap down the transformer. That solved the problem and the inverter has been running happily since - think the code checking build into the inverters are pretty decent.Ā
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.