bilalirfanpk
New Member
Hello,
I am in dire need of help regarding my system. I have 6x 545 solar panels and a 3.2KW chinese inverter [company: Fronus] with a 24v batteries. It has been 13 months since I installed it and it worked perfectly last year. As I live in Karachi, Pakistan, the weather is pretty hot throughout the year and we have great sunlight for around 10 months. I am technically not that well versed with electronics but have little basic knowledge of how things work.
My inverter settings are as follows;
Mode: SBU (Solar > Battery > Utility)
Back to grid volts for battery: 24.5v
Batteries: 2x Lead acid 24v bank (155AH each)
Battery charing source: Only solar
For past couple of months, I have been noticing, as my house load increases anywhere above 1.5kw to 1.9kw (if I turned on my air conditioner which takes around 5.5amp), PV production from the panels starts dropping to 0w literally within a minute and as I use SBU mode, the load shifts from solar to battery and then instantly to grid as batteries cannot endure such high load and drops their volts. As I turn off my Air conditioner, the PV production gets back to normal and starts charging batteries. So my actual problem is that DROP in the PV power production when the load increases, ideally it should not decrease the PV production. For instance, load is around 1300W and the production is around 2200W, but when load starts increasing anywhere above 1400W or 1500W, the PV power drops from 2200/2300W to 0. It should be stay stable or max out, right?
I have tried changing settings and whatnot, but I ain't able to fix this issue. I have tried contacting my installer company but they aren't much responsive as we got bad after sales service generally here. I will share some screenshots from the app that I use to monitor which might clarify the issue with graph curves.
I am in dire need of help regarding my system. I have 6x 545 solar panels and a 3.2KW chinese inverter [company: Fronus] with a 24v batteries. It has been 13 months since I installed it and it worked perfectly last year. As I live in Karachi, Pakistan, the weather is pretty hot throughout the year and we have great sunlight for around 10 months. I am technically not that well versed with electronics but have little basic knowledge of how things work.
My inverter settings are as follows;
Mode: SBU (Solar > Battery > Utility)
Back to grid volts for battery: 24.5v
Batteries: 2x Lead acid 24v bank (155AH each)
Battery charing source: Only solar
For past couple of months, I have been noticing, as my house load increases anywhere above 1.5kw to 1.9kw (if I turned on my air conditioner which takes around 5.5amp), PV production from the panels starts dropping to 0w literally within a minute and as I use SBU mode, the load shifts from solar to battery and then instantly to grid as batteries cannot endure such high load and drops their volts. As I turn off my Air conditioner, the PV production gets back to normal and starts charging batteries. So my actual problem is that DROP in the PV power production when the load increases, ideally it should not decrease the PV production. For instance, load is around 1300W and the production is around 2200W, but when load starts increasing anywhere above 1400W or 1500W, the PV power drops from 2200/2300W to 0. It should be stay stable or max out, right?
I have tried changing settings and whatnot, but I ain't able to fix this issue. I have tried contacting my installer company but they aren't much responsive as we got bad after sales service generally here. I will share some screenshots from the app that I use to monitor which might clarify the issue with graph curves.
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