These little units seem to work fine. However be aware that they produce no output untli the input is about 18v. That means that if your solar panel is not producing over 18v there will be no battery charging going on at all. Above 18v they produce a steady 13.6v. I don't know how much current they can supply under best conditions. My solar panel only provided 18v or more under very bright conditions so I put a Boost module between the solar panel and the MPPT unit. That boosted the voltage up to about 24 v even with quite low solar panel output so I got some charging under most conditions.

These little units seem to work fine. However be aware that they produce no output untli the input is about 18v. That means that if your solar panel is not producing over 18v there will be no battery charging going on at all. Above 18v they produce a steady 13.6v. I don't know how much current they can supply under best conditions. My solar panel only provided 18v or more under very bright conditions so I put a Boost module between the solar panel and the MPPT unit. That boosted the voltage up to about 24 v even with quite low solar panel output so I got some charging under most conditions.

These little units seem to work fine. However be aware that they produce no output untli the input is about 18v. That means that if your solar panel is not producing over 18v there will be no battery charging going on at all. Above 18v they produce a steady 13.6v. I don't know how much current they can supply under best conditions. My solar panel only provided 18v or more under very bright conditions so I put a Boost module between the solar panel and the MPPT unit. That boosted the voltage up to about 24 v even with quite low solar panel output so I got some charging under most conditions.

under test

under test

under test

Work well but does not have battery discharge protection. I exploded one already as I was setting it up the input wire touch and the mosfet and resistor went up in smoke. Be careful when installing I highly suggest a protection diode at the output.

Work well but does not have battery discharge protection. I exploded one already as I was setting it up the input wire touch and the mosfet and resistor went up in smoke. Be careful when installing I highly suggest a protection diode at the output.

Work well but does not have battery discharge protection. I exploded one already as I was setting it up the input wire touch and the mosfet and resistor went up in smoke. Be careful when installing I highly suggest a protection diode at the output.

the products no longer arrive as at first they were fast, I tried them every one of them I will use them in my projects

los productos ya no llegan como al principio eran rápidos, los probé cada uno de ellos los utilizaré en mis proyectos

the products no longer arrive as at first they were fast, I tried them every one of them I will use them in my projects

great product

great product

great product

very goot

very goot

very goot

Products arrived packaged well and in good condition. Very fast delivery this time, thank you.

Products arrived packaged well and in good condition. Very fast delivery this time, thank you.

Products arrived packaged well and in good condition. Very fast delivery this time, thank you.

Received the MPPT charge controller. Thank you. 1. The controller works with input voltage from panel is more than 18V. But it does not work if less than 18V. 2. So during morning time & evening time, we can't use it.

Received the MPPT charge controller. Thank you. 1. The controller works with input voltage from panel is more than 18V. But it does not work if less than 18V. 2. So during morning time & evening time, we can't use it.

Received the MPPT charge controller. Thank you. 1. The controller works with input voltage from panel is more than 18V. But it does not work if less than 18V. 2. So during morning time & evening time, we can't use it.

2 of 3 boards that have arrived showed residue of either oxidation or solder flux, but after all worked

2 of 3 boards that have arrived showed residue of either oxidation or solder flux, but after all worked

2 of 3 boards that have arrived showed residue of either oxidation or solder flux, but after all worked