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I soldered directly to the PCB, i don't use the mini USB port. RED = +5V White = GND Yellow = TX on tester and RX on converter Green = RX on tester and TX on converter

The chargers load terminal is rated at 5A. In my case it powered a 48V relay which acts as a transfer switch between grid and solar (kind of an Automatic Transfer Switch).

What about using something like a Raspberry Pi Zero? What causes the ESP reading wrong data? What are the logic levels on the communication port?

I also set up a test environment with the following equipment: Easun 6048 MPPT, a weak 12V gel battery, 24V power source (as PV), and a Nodemcu connected with 2 wires to the display panel: ground + Chassis TX. I'm using your code, slightly modified it to send values on serial port instead of...

Only one. I mean one in production and one spare. This one is the spare and it will replace the one in production in the near future. The production MPPT is a PowMr, i will inspect it if it uses the same communication protocol. Thanks for the idea and for your work to decode the data...

So, i tried to use ESP hw serial port (GPIO3 as RX) and it works much better than SW serial. I'm getting valid data almost every second. In my test setup max charging current is around 6A and in this interval (0A - 6A or 0W - 70W) the readings are ok. I will test it later in real world scenario...

Hello everyone, i'm planning to extend my small DIY off-grid system, i would like to add a Pytes E-BOX-48100R battery (currently i'm using 4x 12V / 30 Ah LiFePO4 in series). Maybe my question seems odd, but i haven't found this information: can i use these type of batteries with a "dumb" solar...

So, today I put my "smart" Easun MPPT in production, and it's sending live data via MQTT as the charging current changes or every 3 minutes. So far, so good.

Thank you for your answer. The inverter is a 400W Meanwell inverter (will be upgraded soon to 2kW), and the charger is a Powmr 60A MPPT, they don't communicate to each other. The charger charges up the battery to 55.6V max, so bms cutoff should not happen. The inverter turns off at 51V. I'm...

I had a similar problem with my EBC-A20. After connecting to my laptop and running the software i randomly lost connection to the tester. Sometimes it worked hours and then disconnected, but there were cases when i lost connection after a couple of minutes. I suspected that the serial to usb...

Are you using softwareserial on Arduino Nano too? I'm thinking to try to use ESP's hardware serial port maybe Softwareserial is causing the issues and it works better on HW TTL. My experience is the same as yours: as the charging process is started (and i guess the EMI noise appears) ESP is not...

I had luck yesterday, no sunshine at all, so i could make the swap without losing solar energy. The next task would be to verify if my original MPPT (which looks the same as Easun but it's branded PowMR) uses the same protocol. It could be different as the menu and the displayed informations are...

Question: do we need to listen to the LCD? Isn't it enough to connect just to the Chassis_TX? All the data we need (vbat, vPV, current) is coming from the charger.

Hello, i have a PowMR 60A MPPT charger (one of those MSB clones) with a 48V LiFePO4 pack. My D3 setting (low voltage protection) is set to 12.5V (= 50V for my system). Can somebody tell me, if the controller disconnects the load at 50V, at what battery voltage will it reconnect? Thanks.

So, if anybody runs into this problem: these PowMR controllers have no settings for reconnect voltage. They have a D03 setting for Low disconnect voltage, and that's it. Once the battery reaches this LDV value, it disconnects the load, and even when the battery is charged at D02 value...