HLab

Hi everyone I noticed a strange problem with our solar power system's production in Pretoria today (29 May 2025). The specs are as follows: 6 x 545W JA Solar panels 5kW Deye hybrid inverter 2 x 5.12kWh Dyness DL5.0C batteries Early on in the day, I noticed that solar production was picking up slower than in the past few days despite clear skies and similar irradiance. By 11:35, just as our 3kW geyser turned on, the peak generation was only at 2.06kW, despite the battery still being far from full. Yesterdat at the same time it was 2.68kW. I'm not sure what other appliance was turned — maybe a microwave or kettle — but when our consumption picked up to over 4kW, the solar production all of a sudden returned to similar levels as yesterday. Peak was around 2.7kW while yesterday's peak was 2.8kW. This continued while the geyser remained on and consumption was above 3kW. However, as soon as the geyser went off, production dropped unusually low again. Despite the batteries still being far from full, production was 2.05kW by 13:25. On the previous similar day it was 2.55kW at the same time, while the batteries were at a higher state of charge. I have not changed any settings on the inverter between these days. The batteries are set to charge up to 75A. The 75A works out to roughly 3.8kW with the battery voltage, much higher than our system supports. That should therefore not be the problem. Any thoughts or ideas? I suspect a battery issue so have logged it with the installer to troubleshoot. Don't think it would be panels if the production returned to normal with the higher demand. Images below show the production and consumption stats for the two days.

Good day Hanno Labuschagne here from MyBroadband. Would really like to find out more about this issue and follow up with Tshwane. You are welcome to send me an email on [email protected].