40A MPPT Solar Charge Controller 12V/24V DC Input and Bluetooth Module with Wirelessly Remote Control

Working well so far. I like that you can see the charge load in real time.

The Solar Mate software is functional enough but is a bit annoying to use. Sometimes it won’t save settings and won’t tell you why and the back button requires precise touching to work. Now that I’ve got used to its quirks I’m happy enough with it.

I have the parameters set just how I like to keep battery in optimum health.

The charge controller works well with 260 Watts of charge coming from the solar panels. I could not connect the bluetooth module to my iphone despite repeated attempts over two hours. I will make-do without bluetooth control.

I have had six of these units running now for over six months and they have been performing faultlessly. When the units are producing maximum output they do get warm, as you would expect, so bear this in mind when locating and mounting them. The application for data reporting and to change settings works well via bluetooth.

Quality bit of kit not installed yet but build quality 👌

Overall very pleased with this controller, I was drawn to the easy to read display, I can see at a glance how my panels are producing and how my batteries are absorbing.

It’s a plug and play unit, push and hold a button, select battery type and away you go. You can download the app for the bt module, for more settings and see your power production/consumption for the previous year.

Build quality is extremely good, the case is made out of aluminium so the whole unit is a heat sink, great heat dissipation.

BUT…
the terminals. The unit has to be removed to gain access to the terminal screws, they are on the rear of the unit! So if you’re doing a lot of testing, it’s very tedious removing it every time. And also it would be nicer to have some nice and beefy terminals in there. The 24v version can handle 1120W of power, always go with biggest possible cable, unfortunately this unit can’t take that size cable in the connector blocks.

But over all, for the price it’s pretty hard to find a better unit, bought via eBay sale with discount for £75.

Picture shows power produced in Kent UK sun September day. 2s2p 250w panels 4 in total.