So I recently built this battery for my solar system in my shed. This replaced 2 100 pound 140Ah batteries. Cost more but the 2 AGM batteries were used and they still cost $150 each. Build this battery for about $700 including the BMS. This a 100Ah battery which can be discharged th 20% and still get 3000> charge cycles out of it. My 2 140Ah gave me about 120Ah but when they got to 11.5 volts the lights would start to dim and flicker in my shed. I have 6 HF 15 watt panels and a 270 watt Renogy panel charging this battery for now. The HF panels went up because I did not want to throw them away. The HF system is horrible don't buy them they are hobby grade stuff. Good for lights and maybe charging your cell phone. Questions just ask.