Review on Efficient 12V Solar Water Heater Circulation Pump with Low Noise - bayite BYT-7A015 by Jose Guevara

I think I wrote a bad review first but I have to correct it. First thanks to Joy and Emma for their replies and to Revane Prime for their help. I bought two of these items, one with a fork and the other without. These little monsters work well. My problem was that one terminal of the pump cable was out of order, my handyman cleaned it, stripped the cable and the pump quickly started working. No installation suggestions, no troubleshooting page anywhere. They just tell you to return them with no questions asked and you're good. It's true you're great. New installation, on the roof, connect the 30W solar panel to the charge controller and to the 12V battery. The pump is constantly charged from the battery (protects the pump from uneven flow from clouds, birds, shadows), and the battery is continuously charged from the panel. As a result, the pump does not suffer from ups and downs, which any motor will appreciate. Bought three more. Why not 5 stars, I believe in the included well written instructions and troubleshooting tips.