ES II has design flaw/feature which is that it has 250/70 MPPT placed inside the box. So naturally it gets very hot and shuts off on temp alarms.
So my question is, how would i go about "transplanting" mppt to outside of the ESII box?
asked
Easy Solar II overheating
Is this unit still under warranty? It should not over heat. What is the ambient air temperature, near the unit?
Yes. 30C (as seen in photo). Sometimes it goes up to to 40C, but this is not ambient temp but thermostat sensor picks up temp of direct air flow of the ESII exaust fan (as seen on photo).
I have the same problem, the ES II cannot sustain 2 kW inverting for long especially when getting 2 kW from the solar panels. As with you, ambient temperature not that high.
What makes it worse there seems to be no means to read the temperature. I use VRM which has temperature widgets but they show no data, and there's nothing in the web console either. So the first I hear about it is the inverter shutting down due to over temperature.
Should I be able to monitor temperature?
Have you considered adding an external fan to help airflow? Might be less of a problem to do vs rewiring the easysolar.
Yep increase the air flow.
Blowing from below up and from the top away from the unit.
Did you give plenty of space around the unit? Mounting it upright, not on its back?
Upright installation, plenty of room on the sides and on top.
150mm extracting wall fan (250m3/h) near the top of ESII, 150mm vent hole on the other side of the shed.
Is there any option to manually override stock fan speeds or replace it with more capable one?
I think in the ESII GX there is the same fan as in MPII, so it wasnt really designed to cope with added hot air created by added mppt inside the box.
Adding like a computer fan below would be an option, but the design of the air intake space below really isnt suitable for such aid. 2 fans below would be better, but because of all the wires a lot of airflow would not go inside the chassis. And also you cannot place these 2 fans close enough to the box...
Easysolar-II-GX-48V3000-35A (connections).png
Placing mppt outside or increasing extraction rates of the stock fan would be better alternatives, i think.
Is there any option to increase rpm on the stock cooler?
