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One other basic question: What is your setting #01? SBU, SUB, or UTIL? Have tried both SOL and SBU without any difference And your paralleling setup is correct? All comms and current sharing cables connected correctly? And setting #28 on both to PAL? Yes - §28 is at PAL for both. For wiring - yes and hopefully. An electrician friend of mine installed and connected. He have connected several other similar systems without any problems

Thanks for a fast reply from Brisbane So that's 6 panels per inverter? Are they all in one string? 6 72-cell panels seems to be the minimum for the 450 V max PV models; presumably your 380 W panels are 72-cell. What is your PV voltage at say 10am? Yes - have 6 panels per inverter. Connected 3 and 3 per inverter. PV Voltage is around 105V and 10AM when they are in fully sun. Setting 12 at 46 V is quite low; that's a very high discharge of your presumably lead-acid batteries. I would increase that to 48 V. Will do - thanks I believe that your biggest problem is setting 13; 54 V (13.5 V per 12 V battery module) is moderately high. You want to be running in battery mode while the battery has a moderate state of charge, so you're not using Eskom all the time. I'd try 50 V (12.5 V per 12 V module) to see how that goes. Have tried as told in the attached excel sheet, to lower §13 to what the Inverter shows for Voltage on batteries, but still do not supply the utility from the battery - but Eskom Having the geyser on the inverter output is a bit optimistic, depending on the power rating of the geyser. You have around 4.5 kW of panels, from which you can expect no more than about 3.6 kW; if your geyser element is 3 kW, that leaves very little for general loads and battery charging. Consider rewiring the geyser to always run off Eskom, unless you add more panels. You may be expecting too much from this system. Agree - only switched off one inverter when know the geyser was off (running on timer during daytime), so am aware and why have 2 inverters. You may also be suffering from the premature float bug, which will chronically under-charge your battery. This is no good for it, and will severely limit the savings you get from your system. Watch the charge LEDs to see when the inverters stop charging the battery; the battery should hang around 56 V for at least an hour before the charge LED goes solid (indicating float stage). If this is happening, consider patched firmware, or if not possible, using one of the work-arounds (timed absorb or the equalisation settings).

Hi. I am new to the forum and have been looking in FAQ if could solve my challenge, but did not find the answer. Have a solar system with 12 x 380W solar panels, 12 x 102ah deep cycle batteries, 2 x 5kW Mecer inverters. Run 48V. Stay in south of JHB area. Plan - in priority: PV supply utility If PV too low, PV and battery supply utility If PV is zero, batteries supply utility Eskom only take over when 1, 2 and 3 is not sufficient Settings: Batteries will only be charged by PV (§16, OSO), which they do Batteries settings, (§ 12, 46V, §13 54V) Problem (Bypass) PV charge batteries until fully charged and utility supplied by Eskom in meantime Meaning - hardly got any drop in my daily Eskom usage in therefore my utility bill I have played around and changed settings on inverters to see if could avoid Eskom to supply, when my V on batteries was higher than minimum (46V), but to no success. If I switch off one of the inverters for Eskom supply, then the system runs as wanted - until the usage is too much for one inverter, like geyser kicks in etc. I have attached a spreadsheet for the readings the last days and who provide my usage. Much appreciated if someone can help. Regards Soren 2020 06 07_Usage_PV-Eskom.xlsx