Project Farm tests the battery testers.

softdown
softdown Solar Expert Posts: 3,963 ✭✭✭✭
This guy is a force. FWIW the Ancel came out on top - the tester I have mentioned here. $32 - the cheapest that also passed all the tests. 

https://www.youtube.com/watch?v=yRvlS6EC15U
First Bank:16 180 watt Grape Solar with  FM80 controller and 3648 Inverter....Fullriver 8D AGM solar batteries. Second Bank/MacGyver Special: 10 165(?) watt BP Solar with Renogy MPPT 40A controller/ and Xantrex C-35 PWM controller/ and Morningstar PWM controller...Cotek 24V PSW inverter....forklift and diesel locomotive batteries