I've been working on a DIY Coulomb counter. https://diysolarforum.com/threads/coulomb-counter-for-diy-bms.11610/ I've noticed the Chargery SOC and AH counts were way off base. With the Coulomb counter complete, here's a comparison of my counter and Chargery's serial data. The entire test encompasses 45 hours. The graph shown is just for the first 25 hours.
The first 15 hours occur with no solar activity. There's a quiescent load current of about 0.9A. The DIY AH counter starts from zero and ramps down for about 16 hours. The Chargery counter doesn't detect the current and AHs remain at zero until there's adequate solar current. After 16 hours Chargery has a -15 AH error.
At dawn (about the 15 hour mark), the DIY counter reacts 2 hours earlier to solar current.
At the 20 hour mark the microwave was turned on for two periods of 3 minutes each. About 160A to 155A are drawn during that time.
About the 23 hour mark (dusk) Chargery's curve flattens. Any current below an amp is registered as zero.
Chargery's AH/WH information is a disaster. The AH/WH/SOC info will be too high. In my case, errors can accumulate at 15 AH per day.
The first 15 hours occur with no solar activity. There's a quiescent load current of about 0.9A. The DIY AH counter starts from zero and ramps down for about 16 hours. The Chargery counter doesn't detect the current and AHs remain at zero until there's adequate solar current. After 16 hours Chargery has a -15 AH error.
At dawn (about the 15 hour mark), the DIY counter reacts 2 hours earlier to solar current.
At the 20 hour mark the microwave was turned on for two periods of 3 minutes each. About 160A to 155A are drawn during that time.
About the 23 hour mark (dusk) Chargery's curve flattens. Any current below an amp is registered as zero.
Chargery's AH/WH information is a disaster. The AH/WH/SOC info will be too high. In my case, errors can accumulate at 15 AH per day.