January 4, 20242 yr Hi We recently installed a Sunsynk Powerlynk in our suburb's guard house at the boom control. We get power from a neighbouring house. The inverter installation appears to be fine, but it seems that the incoming voltage spikes to above 260V at times (I've witnessed 258V shown on the display) and the charger is limited to max 251 V input, or the protection relays kick in. We have been told that we need to install an AVR to reduce the voltage - can anyone suggest a good product that is reasonably priced and is fairly small (we have limited space)? In addition, where would we now install the CT coil to control zero export - between the mains and the AVR or between the AVR and inverter. Thanks guys Regards Greg
January 4, 20242 yr 10 hours ago, greghayter said: Hi We recently installed a Sunsynk Powerlynk in our suburb's guard house at the boom control. We get power from a neighbouring house. The inverter installation appears to be fine, but it seems that the incoming voltage spikes to above 260V at times (I've witnessed 258V shown on the display) and the charger is limited to max 251 V input, or the protection relays kick in. We have been told that we need to install an AVR to reduce the voltage - can anyone suggest a good product that is reasonably priced and is fairly small (we have limited space)? In addition, where would we now install the CT coil to control zero export - between the mains and the AVR or between the AVR and inverter. Thanks guys Regards Greg My 1st call would be to get the supply authority to lower the supply voltage as it is on the high side. One would also try to see if the voltage is so high only at a specific time of day. Low or peak times. This will be to the better of all connected to the same distribution transformer. If this fails have a chat to a technical guy at PHD powerhouse. My gut tells me a voltage stabiliser will not alter the position of the CT. The CT only measure the current in order to prevent export. The inverter will still see the correct current as well as the actual voltage coming in to the inverter. It should not be affected by the ratio change taking place by the auto transformer with its common point between input and output. I have no experience of a stabiliser combined with a inverter. Just mentioning as I think. Edited January 4, 20242 yr by Scorp007
January 5, 20242 yr Author Thanks @Scorp007 Our problem is the power is taken from a neighbouring property, and he's not really interested in doing anything his side, so lowering the supply side is tricky. The voltage is definitely higher during the day; when the suburb starts using power around 5pm, the voltage drops below 250V and the battery charger kicks in after a while, but the moment the load drops, the problem reoccurs. I've spoke to Sean at PHD who has suggested a product, and confirmed that the CT position should be unchanged.
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