My Experience with Partial State of Charge Operation? Curtis Ashton IEEE PES StaBatt Winter 2016 (January 10th) meeting Sunday Technical Panel Sessions Stationary Battery Committee

Stationary Battery Committee Overview Solar My Company My Cabin Learnings Including OverDischarge Due to Weather Stationary Battery Committee

Some CTL Solar Installations Stationary Battery Committee

Stationary Battery Committee My “Cabin” Stationary Battery Committee

Cabin is Actually Hybrid Application Future Crappy Rural Intermittent Grid Power Stationary Battery Committee

Stationary Battery Committee What I/We Have Learned Charge Controller Critical Prevents Summer Overcharge and Winter OverDischarge Not All Charge Controllers Have LVDs Very Critical for Lead-Acid, Especially VRLA Finish Charge Important in Summer to Clear Sulfation VRLAs Better than Flooded for PSOC? Flooded with Antimony (including Selenium) Work OK Tubular Gel VRLA Best Lead Acid Stationary Battery Committee

Stationary Battery Committee OverDischarge Kills Lead-Acid Batteries Ni-Cd is Better Option Stationary Battery Committee

Options for Lengthening Battery Life Upsize Batteries on Standalone Turn on Hybrid Grid or Generator @ Higher Voltage % DOD for most battery types not @ same % voltage drop Stationary Battery Committee