Jsengxx

If you look at the Infinisolar line up for example that is the better or next line up of inverters from Voltronic, they all have Start-up Voltage and Initial Feeding Voltage for example 120vdc/150vdc this means that the inverter will only wake up at 120vdc (I think it is even wake up at 150vdc and start producing) and start producing at 150vdc and only stops producing below 120vdc. From what I can see from the max and mks line, this is not present in the inverter and I think the inverter is trying to produce right away at the bottom of the MPPT range and in practice the inverter will begin producing, panels get warm and you will get the drop in voltage, going below MPPT range, and inverter gets stuck. There is no margin like in the other inverters, begin production at 150V but you will have 30V (the 120v start up voltage) sitting below for the inverter to work properly.

First of all congrats for the great thread! I would like to point out one thing that I noticed when looking at different manuals from voltronic vs clone inverters. When you look for example at the Growatt spf 5000 es, that is made by voltronic, we can see that it has a mppt voltage range of 120v-430v but it has a start up voltage of 150v. Now if we look at the manual from the voltronic mks iv you can see that it has the same mppt voltage range of 120v-430v but it is missing the start up voltage. Can it be that Growatt did see the mistake in the Voltronic devices and added the extra start up voltage in the bios of the inverter to only begin producing from 120v on to overcome this clamping? Maybe it would be interesting to see what the code is for the Growatt inverters and compare them with the voltronic and maybe try out a moded bios version with start up voltage added maybe 120v for the 8kw models and 150v for the 5kw/6kw models. I would love to see a powercurve from the Growatt spf 5000 es inverter! maybe DavidPoz from the below channel could help us here.

Will probably go for the new 2xMKSIV in parallel, they are rated at 5600W giving me a total of over 11kw of power and 20 jinko 530w panels, 5 in serie and 2 in parallel for each inverter giving me a total of 10600w, 5300W per inverter (well within the specs of 6000W per inverter). Thnaks for the help

Does the Axpert MKSIII or MKSIV have the ability to blend the power from Sources? Thanks

Thanks for your reaction 87... Right now we live in an appartment and here in Portugal we have a main breaker from the grid supplyer of 6.9kw, if you try to pull more it will trigger the breaker and I have to turn on the breaker again. This is happening from now and then when we are cooking (induction stoof) when we turn on the water heater:) My main concern is that at our new house we will have 2 hot water heaters installed in serie, on days with less sun only one of them will work, each one is 1.5kw. Then we will have air conditioning that will cool and heat the house, 4 bed rooms, kitchen, living room, dining room and office and the normal stuf in the kitchen, induction stoof, dishwasher, oven, micro wave and the washing machine in the loundry. Outside we will have a water pump in the well to water the garden of about 1kw and a swimming pool pump of about 1kw. What would you recomend for this kind of house? Still 2 x 5kw Axxpert MKSIII or MKSIV? Thanks

Hi 87, is there any news with regards to the new max models, the max II? How do this inverters performe at max power? If you tray to use 8000w for example. I am building a new house and was thinking about the max 8kw model with 18 jinko 530w panels, 9 on every pv input and a 20kw lithium battery, grid connected but I have understand that the old max models are going to use 2A from the grid to charge the battery when it is empty. From the manuals from the new max II models I have understand that you can now set it to charge only from solar. Would the max II be a good candidate or would it be better to use 2 VMIII or the new VMIV in parralel with the same 18 panels, total 9600W? The max 8kw is limited to 8000w total in panels, would it be to much to over size the pv too 9600w? I am afraid that these inverters strugle with max power. Thanks