Wilfried

In the meantime I found a great explanation how the timer works on another forum. Please see below link ... LV6548 output/charger source priority timer settings | DIY Solar Power Forum (diysolarforum.com) Thanks to Wayne530 on that forum

HI Oliver, thanks a lot for your feedback. That confirms my assumption. I also understand that the hours settings as you describe. Cheers

Hi there, I'm warming this thread up after some month because I have a question re the timer on Axpert inverters. I upgraded from an 5kVA Axpert to a Axpert SOL-I-AX-8M2 (I believe usually referred to as Max2). As batteries I run two 5.2 kWh Blue Nova's. Now that in South Africa the days get quite short I wanted to use the timer functionality for output source priority (setting 99). As the battery bank runs very nicely I typically run in SBU mode all the time, though from now to the end of July I would like run in SUB for the "morning peak" with hair dryer, coffee machine and toaster from 6am to 8am. I was looking around and trying to find the base logic of the timer to set it correctly, but couldn't find a general overview. Hence my question to you guys ... is my understating correct that I would leave the output source priority (01) on SBU and set the output source priority timer (99) for SUB for the time between 6am and 8am? Thanks a lot for your feedback and help ...

Hi there, I would like to revive this topic. Unfortunately don't have a solution, but having the same issue with an Max2 8KW inverter. But I was wondering whether you have any resolution since this happend 7 months ago? When I realized what was happening with SNU charge mode not working according to the manual I got the inverter swapped as a warranty claim because it was only two month old when I had to use utilities for charging in line mode. The new inverter behaves in the same way. Its charging with utilities only, if there is no current coming from the panels. As soon as the panels produce current utilities charging stops immediately and only charging with panels happens. Thanks for some feedback, Wilfried

Aha, now I understand. I was wondering about the efficiency, which I read should be around 75-80%. Thanks for educating a newbie!

ups, I think you lost me with the second part of your response ... I get the absorption load of 58V and I also understand that the 200Ah should be decent for my consumption. But then I can't follow up any more. Unfortunately I am not an engineer. Do you mind giving a bit more background .... Thanks!

Hi Plonkster, that makes a lot of sense. Thanks for your quick response, Wilfried

Hi All, thanks a lot for your input and feedback. I was away for a few days and therefore my late reply. Your input helped me a lot in what to investigate further. In particular I learned a bit about the issue I have with my batteries. The Maximus batteries I have are indeed not deep cycle and therefore quite finished already after six weeks. The only way to find that out was to install Watchpower (knowing that it might not be the best) which gives a good idea what's happening with the system at any point in time. I gave the info to my installer, who will replace the batteries (for free) and replace with Led-Crystal (Deltec) batteries. I'll report back once I have those for a few weeks. Some feedback specially for Plonkster and viper_za who asked some questions: - I have an average load of 120 to 180W during the night due to security lights (all LED) and fridge (which is AA rated) - During the time between 6pm and 11pm we might run TV and some additional lights (LED) which pushes the regular load up to ~300-350W - There are some peaks for using the microwave for a few minutes in the evening and morning. During that time we use ~2000W. I created an xls to understand the overall consumption and therefore I arrived at the ~3.5kW per night. Based on that info would you still think 200Ah is enough? Thanks and Cheers, Wilfried

Hi All, I am fairly new to the solar topic and I have experience for about 6 weeks in production with our system by now. I was lucky to find this forum and being following it since a few weeks and see there is great info coming out, which one hardly gets anywhere else. We have an Axpert 5KV (branded by Mecer) inverter, 12x250W panels and 8 x 105Ah Maximus batteries. I am very happy with the capacity of the panels during the day with running things like pool pump, dishwasher, washing machine and the rest of the house. Our geyser is converted to solar with evacuated tubes and the oven is still on ESKOM. What I noticed is that I clearly have to little battery capacity and I am wondering whether you could give me some input to how many more batteries I need to go for. To become quite independent from ESKOM I would like to get through the night with my batteries. We have a consumption of ~3.5 kWh during the night, which I calculated with a xls I created to understand our overall consumption. Based on battery sizers like http://www.freesunpower.com/system_sizing.php I need to double to 16 x 105Ah batteries. What I saw on that battery sizer is that is calculates the battery capacity for 3 days, which I don't believe we need 3 days capacity locally, not even in Cape Town winter. As the batteries cost quite some money I was wondering whether I would really need 16 batteries or whether 12 batteries would be enough to get us through the night. Thanks a lot for your thoughts/feedback and Cheers, Wilfried