I would recommend upgrading the MOSFETs with some of higher voltage and current ratings and not made in china. It's what I do when someone brings me cheap junk to repair that failed prematurely and I haven't had a single complaint.
1. whether increasing the mosfet can increase the voltage & current of the input and output? 2. Will changing the larger mosfet not affect the rest of the components? 3.do you know what type of mosfet is suitable for use in epever 3210? thanks
@@hditiktik5032 You would need to make sure the other components can handle the higher voltage, if it's already designed to go up to at least 100 volts, then it would probably just need higher voltage MOSFETs and if there are any electrolytic capacitors you would need to verify that they are rated at a high enough voltage (at least 50% higher than the highest expected voltage, but approximately double the voltage is better). But you would need to know what you are doing and consider the entire circuit. And the purpose of increasing the voltage rating of the MOSFETs isn't to necessarily increase the rated voltage of the unit, but rather to keep them from being destroyed when the voltage does get up to the rated voltage.
Hi Ken, if you want to NOT go through a lot of fuses, you can use an old school brake light bulb with the filaments soldered in parallel and pig tails with spade sta-kons for the fuse connections. In the event of a short or high amp draw the bulb will light, not pop a fuse. I have a 4210 that worked for a few seconds then went out, but no blown fuses. Dealing with seller at this time.
@@rm6857 No, I went on to other disasters and parked the controller back in the repair bin. I'll probably take another poke at it this winter if I have time. I have gone away from the Epever brand entirely as I have found that Renogy 40amp Rover controllers are far more reliable. The Renogy has virtually the same cheezy display but I have, so far, not had to take one apart for repairs. My 3210 Epever did not blow fuses or any FETs but there appears to be a control circuit problem on the main board. There is a tiny chip with 5 legs (voltage regulator) parked over to the right of the display connector on the main board, and it gets hot. I have replacement regulators but I did not get to trying one out. I don't hold a great deal of faith that this unit will come back to life, and you can forget about there being any service information available, I've already spent more hours on it than it is worth.
@@gilrand6224 Mine has blown mosfets, i think i helped it a bit with not strong connection to the battery, so there was input from panels, batery disconected for a while, and it was dead. I went for PWM, if panels voltage is close to battery voltage, and you have space, you can basically just buy one more 2nd hand panel and get more power and cheaper than mppt. Keep us updated about the repair.
@@gilrand6224 I have the same problem I see that the voltage regulator is heating up and next to the capacitor it shows continuity at the input of the display, apparently we have a short
Nice job figuring out what MOSFETs took a crap. MOSFETs are static sensitive. Good luck when you get the new ones i will be looking forward to seeing that video.
I have two Midnite Solar 150/250 and one EPEVER 40A. All good so far, although EPEVER is has always been slow to react to changes in pv or battery load.
I was looking for a repair video because mine also does not turn on anymore, but at first glance the 2 fuses are good, what exactly are the mosfets you found in short circuit?
If you follow the power on procedure battery must always be power on first then pv....like wise in shut down pv must always be power off first....your mosfet will blow in 2 ways over load and improperly power up or power down
I followed that procedure. It went off during the night not because of improper connect disconnect. I am still looking for the cause of the failure. Thanks for watching and commenting.
Sometimes I clip the leads off close to the mosfet body and solder the new mosfet on to the original leads but only on ones I can't get the originals out.
That is a very difficult question. You need to have basic electronic knowledge and instruments. Check the basic things first. Fuses, connections, and look for any damaged components. Bulging capacitors burnt mosfets etc. Quite often they are beyond repair because the damage is to extensive. There are some good videos on you tube that may help. Good luck.
@@kevincrawford2027I started learning basic stuffs, I can measure mosfets, capastors, resistors etc. I try to fix an inverter, I change almost all bad components but still cannot power on, I believe I missed something. please recommend some videos. Thanks
