Il_Biondo Posted June 30 Share Posted June 30 Good morning everyone, a couple of days ago I installed an Axpert Max 8kw inverter purchased from SolarPower24 in Italy. The inverter has firmware 72.07, but I notice that the temperature remains high even without loads or production, and the fans always run very slowly (I had a Max 3.6kw and the fans ran very fast, always keeping the temperature low). The temperature stays around 70 degrees at rest, but if the production starts and is high, the fans turn on and the inverter's temperature decreases. Is this normal behavior? Could it be a problem with this firmware? Thanks. Quote Link to comment Share on other sites More sharing options...
TaliaB Posted June 30 Share Posted June 30 (edited) 1 hour ago, Il_Biondo said: The temperature stays around 70 degrees at rest, but if the production starts and is high, the fans turn on and the inverter's temperature decreases. If you are referring to 70°C then yes you have a problem and the fans should run full speed detected via the temp sensors inside the inverter. If the temp is 70°F then it is normal 21°C. What is your ambient temperature? Edited June 30 by TaliaB Quote Link to comment Share on other sites More sharing options...
BritishRacingGreen Posted June 30 Share Posted June 30 (edited) 3 hours ago, Il_Biondo said: Good morning everyone, a couple of days ago I installed an Axpert Max 8kw inverter purchased from SolarPower24 in Italy. The inverter has firmware 72.07, but I notice that the temperature remains high even without loads or production, and the fans always run very slowly (I had a Max 3.6kw and the fans ran very fast, always keeping the temperature low). The temperature stays around 70 degrees at rest, but if the production starts and is high, the fans turn on and the inverter's temperature decreases. Is this normal behavior? Could it be a problem with this firmware? Thanks. Is 70 deg C unusual for you, have you been used to lower temperatures as a basis of comparison? Remember that 70 deg is the heatsink temperature. The silicon junction temperature will be even higher than that. While an inverter is idling at no load the temperature will increase due to losses turned to heat. But the fans should kick in and you should not have much higher than 70.even at load. EDIT : the absolute max temp for a mosfet is around 150 deg. But to be in the safe operating area I guess we need to have 90 deg limit. So 70 deg heatsink temp is ok, I guess. Furthermore the inverter looks after itself with a temperature control system. If it cant obtain the wanted window of temperature it will act accordingly with error/shutdown. But we must contribute by keeping filters etc clean. In terms of fan speed, the bigger machines like your have speed control, and the control loop will increase speed when temp rate of change gets steep. Edited June 30 by BritishRacingGreen Scorp007 1 Quote Link to comment Share on other sites More sharing options...
Il_Biondo Posted June 30 Author Share Posted June 30 Thank you everyone, yes the 70 degrees are Celsius. The ambient temperature is now around 30 degrees Celsius. The inverter is new, in use for 2 days. I was used to lower temperatures with the previous Axpert Max at 24V (max 3.6Kw). My concern is that these temperatures might be due to a firmware bug where the fan control is not working properly (this one is much quieter compared to the previous Max at 24V). Quote Link to comment Share on other sites More sharing options...
solardavid Posted August 16 Share Posted August 16 hi, I have the same inverter as you, have you tried removing the filters on the upper air intakes? Check if the temperature drops in the same conditions. My idea is that the original filters do not let enough air pass to cool the heat sinks. Then try making new filters: I put filters for the kitchen hoods (the black ones with a carbon layer) of the same thickness but with wider mesh, also removing the filter holder and I partially solved the problem by lowering the temperatures by several degrees. (from 65-68 to 52-54) If you want you can also add a 12 x 12 or 92 x 92 fan on one side at the bottom on the side of the inverter in suction (you also need a small duct to distance it from the holes of the inverter output air). I hope I have been of help to you. Good sunshine Quote Link to comment Share on other sites More sharing options...
Il_Biondo Posted August 16 Author Share Posted August 16 Hi, yes i have removed the filters and the temperature drops to 50 degrees. Original filters do not allow air to pass through. In summer I leave it without filters, then before the next season I open it and blow it to clean it. Thank you Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.