Parts list, blueprint and info on bottom balancing/cycling charge profile (very important!) can be found for free, here: https://www.mobile-solarpower.com/diy... My Updated Charge profile for LiFePO4: Charge Limit Voltage: 13.3 volts for 12 volt battery, 26.6 volts for 24 volt battery Float Charge Voltage: 13.2 volts for 12 volt battery, 26.4 volts for 24 volt battery Set Temperature Compensation Coefficient to: 0 (usually its -3) Set Equalize Time to: 0​ Use a battery protect by Victron Energy and set it to option "8", which will disconnect at your loads at 12 volts for 12v batteries, and 24 volts for 24v batteries Check out my latest best-selling book on off-grid solar: http://amzn.to/2Aj4dX4