40A MPPT Solar Charge Controller +MT50 Monitor+Temp.Sensor Package Tracer 4210AN 100V Solar Panels Power Input Support Lithium Battery Charger Regulator Negative Ground

I received the controller and installed it today. It looks very nice and appears to be made well. I bought it with the MT50 controller and it all seems to work well together. I have a total of 500W so I'll be interested to see how it works in full sun. I was getting a few amps in the shade today. My old PWM never did that. I'll come back later and update when I have some time with it, but 5 stars for now for the quality appearance, ease of setup and it worked as expected out of the box!

Have been using two of these for about half a year now and they work great

We ordered it in February, worked like a champ until sometime in July when it started locking up and not charging the batteries.The batteries would last one week or two depending on whether there were 2 or 4 batteries on site. The charge controller would stop outputting power. It would have to be disconnected from the panels and the batteries entirely to reset the controller then it would work for a few days to a week.ZHC refunded me, no fuss, and I ordered a replacement, same unit. I'm sincerely hoping the failure was a fluke.Early in the mornings, before the sun even hits the panels directly, it is pulling 17v from the panels, converting that to 24+v and charging the batteries as the sun rises.

Failed on 3rd day. Not worth the money.Full story:I purchased EPEVER 40A MPPT for 2S2P PV system, rated 260x4=1040W and 38x2=76V open circuit (2pairs in 2 series).Controller was programmed for User defined 28V Charge limit, 28.2V Over voltage disconnect and 28V Equalize,Boost, Float. 27.5V Over Voltage reconnect.It worked fine for 2 days and charged ~7kWh (system consumption is ~ 400W in business daytime schedule only).In the morning of 3rd day, all electrical system where shot down at opening hour 8.30AM.Inverter and batteries where in protection mode. Inverter, charge controller and MT50 monitor screen off. Battery side at 68V.After disconnecting panels from charge controller, Inverter and Batteries went on-line with 29.5V and work normally again, thanks to LiFePO4 BMS (batteries management system) and sophisticated protection on the inverter.In some way, the controller managed to overcharge the battery over 30V, where BMS shuts off the battery for OVC (over voltage protection).I contacted the seller and only mode to exchange the controller will cost me additional 80USD. (I do not live in USA).After opening up the controller I was really disappointed, most of the components are just on their specified survival limit on 24V LA battery system and 100V open circuit PV input, not suitable for system with payback terms measured in years. Definitively not even worth 80USD for replacement shipping.BTW failed components: 5V regulator for IC, 2 capacitors and at least 3 MosFets. No failure protection for output side found, which means if something happens you will see full PV array voltage on your DC/Battery side and loose all your unprotected equipment (up to 100V in certain PV configuration), which is unacceptable to me.My tip:Do not spend extra money on this controller, better spend it on additional PV panels.A cheap 50-60A 15USD PWM controller has components with same tolerances and with one additional 260W panel (to cover lower efficiency of PWM) it is still cheaper, more productive, secure and robust in 5P1S (38OCV) configuration. Panels do not brake and controller replacement only trows you back 15 bucks.

Controller did not have a auto pick for AGM battery but it can be set up for AGM battery. It is installed and working effectively. Delivery was fast and it arrived in good order

1 1/2 years ago, I purchased this charge controller for a mobile power station, combined w/alternator charging. Several months later, while assembling all of my parts, I noticed that the 4210A is positive grounded. But, the vehicle and inverter are negative ground. Today, upon further investigation, I discovered that I was sold the wrong charge controller to begin with. Argh!!Within one day of posting the above, I received an email from a ZHCsolar representative, who offered to replace the 4210A with a new negative ground model. Happy camper! Thanks ZHCsolar!

Good quality works well. This was placed in a solar tower. The correct part for job

Very happy with this charge controller. Only issue I had was tightening the lugs for the input wires (#8 AWG), I had one of them strip though I was able to repair it without issue. I would recommend they use a fastener which is less prone to stripping. So far with two 165W, 9.5A panels this is doing an amazing job of charging my 4 T-105RE batteries