[Upgraded] 30A MPPT Solar Charge Controller, 12V/ 24V Solar Panel Intelligent Regulator with Adjustable LCD Display Dual USB Port Timer Setting Auto Parameter

Second one purchased, used in camper build feeding 200W solar into 200Ah Li batteries. Seems stable, runs cool, no gremlins so far, EXCEPT:NOTE it is shipped set up for 24V output (mine was anyway), you will need to **immediately** reprogram for 13V output or you could overload your 12 V system.This is not a complaint, just informational. I like it and bought a spare.

Great versatility in selecting type of battery voltage

The instructions are terrible. They lead one to believe this charge controller is ONLY for lead acid batteries. But they hint that lithium is also usable but do not explain how to change from b1 (lead) the default setting to b2 or b3 (lithium). Well I figured it out on my own so I canceled the return. To change to lithium b2 or b3, hit the menu button until the screen shows 'b1'. Then press menu and the "minus/down arrow" at the same time. This makes b1 flash and allows you to cycle through b1-b2-b3. So I set it on b3 (Li iron) which is my battery type

I have no idea what this is. It says it's PWM, but not sure. It says it can support 30A but the terminals are undersized. It says it can charge a Lithium battery but there is no indication that the battery is actually be charged because there is no way to show Amps coming in. This controller lacks all the important features you need like being able to adjust your array if your Amps are to low or determine you have a wiring problem because your Amps are too low or realize your battery is not charging because you hooked up to many panels in series. That's right, no one will tell you but good luck with panels in series with this controller and given how bad quality the terminals and soldering I'm not sure I would recommend this.

Exactly as described works great so far.

Really hard to figure out how to use these. The "manual" isn't really clear. Need to do more testing. Had it shutting down the input source when the battery was pulling an amp to 1.5 amps of charge.

Super easy connections. Made a recharge solar box used it as the control feature.

I’ve had two of these and they work really well. Amazing value for the money