Br999

Hello everyone, I have an Axpert MAX II 11K Twin, and with the return of autumn I reconfigured my inverter to increase the charging power to take advantage of the slightest ray of sunshine. I set it to 150A (I know it's a lot and it would be better to stay lower). In the spring when I set 150A my smartshunt indicated 143A (we are already far from 150A), but now I no longer exceed 139A on the smartshunt, yet the inverter still displays 150A. What could be the cause of this drop? Is there a way to adjust/calibrate the current? The inverter remains below 50°C at 10.8Kw of power. Thank you for any help or information on this subject.

My inveter have firmware u1 75.00 and u2 39.04, apparently not compatible

So I would have to ask the seller for the firmware version before buying it(if I decide to buy one). I never found the firmware download or update anywhere for the Axpert MAX 2 11K TWIN...

I manage to limit the temperature to 48°C, with improved cooling at an mppt power of 10.8kW (8kW battery charge and 2600W for the AC water heater) but perhaps other components which are not monitored heat up more. It might be better to mount a second inverter in parallel. Besides on this subject is it possible to put the same model but which will possibly have another firmware in parallel? I bought mine a year and a half ago, no guarantee that the model being sold is exactly the same?

I have an adc7480/72/E 3200W battery charger but the output voltage is adjustable to 55.2 volts.I already have this charger

anyone else to give me their opinion on this possibility?

Yes, I want to activate the second charger when consumption is low and the sunshine is strong. At this moment I only use 8kW (max power of the inverter charger) of solar power while the mppt/inverter/photovoltage panels can 11Kw. the second charger will be connected to the AC output of the inverter, to reach a total of 11000 W = house consumption (300W) + battery charge ((140+42A) X55.2V). so it would be possible to recharge the batteries of the inverter with a charger powered by the 230v produced by the inverter itself? no risk of returns? I don't really know the internal topology of this type of inverter the goal is not to use the battery to recharge the battery, I understand that this is not possible and useless, but to use the power not to use mppt (around 2.5kw) during full sun, to charge more via the AC output of the inverter.

Hello, I have an Axpert Max 2 11Kw TWIN, and I would like to increase this battery charging capacity (if possible). This is limited to 150A (rather 141A really), around 8kW, and in certain conditions my home only consumes 300W while solar production can reach the maximum, i.e. 11kW. there is therefore a loss of energy. I have an adc7480/72/E 3200W battery charger and I would like to add it as a backup charger using the AC output of the inverter. I know this is not the ideal setup but can it work without problem? I checked the insulation of the inputs/outputs of this charger, and apparently it is indeed an isolated model. As this charger is limited to 42 amps, I will program it so that it turns on when the battery load of the inverter exceeds 100 amps and that it turns off when the battery load drops below 50 amps. At full power with low consumption in my home I could charge the battery up to 180 amps. In your opinion, is an assembly of this type risky for the inverter? In the inverter manual it is clearly indicated that it is not isolated, but if the charger is isolated this should not pose a problem?

Hello, has anyone had this problem or anything similar to it? when the battery charge reaches its maximum and the AC load is close to zero, intabilities appear on an mppt, the one where the voltage is the highest? I tried to invert the inputs, the problem is the same, the input where the voltage is the highest fluctuates arrived at 150A battery charge when I have time ans sun I will try in 8s on both mppt but there is work to change all that. no idea ? thank you

yes but I find that they were wide with the derating, for a 500v voc and 450v mppt inverter, from 360v PV the battery charge goes from 150 to 90a! 60%! It's a bit of an abuse because it's not written anywhere in the manual!

the mppt goes up to 450v, and in 10s I do not exceed 375v I think the safety margin is sufficient, right?

Hello, today a beautiful sunny day, and new problems appear! When the AC load is low, and the PV power is high, the battery charge fluctuates. We see it on the graph I "play" with the water heater, when it is on, the pv power is stable, and as soon as I turn off the water heater the battery current drops then rises to 150A, then falls again then rises again... The problem is visible on mppt 2 the voltage drops to 150v. I just changed from 3p8s + 3p8s to 4p8s + 2p10s. I don't know if the problem arose before because it's been a long time since there was a strong sun Or maybe in 10s the power derating is already effective? I know that if I exceed 360 volts the charge no longer exceeds 90 amps Can too little AC consumption pose a problem? last summer the problem did not arise I always consumed more because of the pool pump which worked all day thanks for any help

otherwise while waiting for me to modify the original fans here is what I did by removing and replacing the upper cover and the disconnection cover which allows me not to touch the warranty label. I made two different filter sizes I made the parts in 3D printing I have the files if anyone is interested with this system in a room at 25 degrees at 10 kW of solar power I keep the inverter below 55°c and it remains less noisy than the original fans

given that I use solar assistant I do not have direct access to the serial connection if the temperature displayed is the maximum temperature of the components we will say that it suits me, but I would have liked to have all the temperatures

Ok, if I do it I'll leave a message, it's not too urgent as winter arrives it might heat up less!