LiFePO4 - SOK or Renogy.
Not looking for a big bank or high charge/discharge currents. Don't need charging below freezing. In Canada things become difficult/expensive. Narrowed down to these 2: 1)SOK, 100AH, $CAD 975 ...
Forum Discussion
Hi BFL13,
I think folks just want a battery they can "set and forget" and have larger capacity.
The fly in the ointment appears to be that, at least, for LiFePo4 that 40% to 90% gives the best cycle life. I'm very wary of their limitations on temperature, too.
I think it is a rule of thumb that the deeper any battery is discharged, the shorter the lifespan.
It we truly wanted super long life--then move to Edison batteries and be done with it. Thirty years--and then replace the electrolyte.
https://ironedison.com/nickel-iron-ni-fe-battery
100 amp-hours @ 12 volts cost is $1093 usd.
Nominal Voltage: 1.2 Volts (per cell)
Charging Voltage: 1.65 Volts (per cell)
Efficiency: 80%
Cycle Life: 11,000 Cycles At 80% Depth of Discharge
Float Life / Shelf Life: 30 Years / 85 Years
Optimum Charge & Discharge Current: C/4
Minimum Charging Current: C/20
Maximum Continuous Charging Current: C/2
Maximum Discharge Current: C/2
Self-Discharge Rate: 1% per day
Operating Temperature: -30? C To +60? C (-22? F To +140? F)
Warranty: 10 years pro-rated
I think folks just want a battery they can "set and forget" and have larger capacity.
The fly in the ointment appears to be that, at least, for LiFePo4 that 40% to 90% gives the best cycle life. I'm very wary of their limitations on temperature, too.
I think it is a rule of thumb that the deeper any battery is discharged, the shorter the lifespan.
It we truly wanted super long life--then move to Edison batteries and be done with it. Thirty years--and then replace the electrolyte.
https://ironedison.com/nickel-iron-ni-fe-battery
100 amp-hours @ 12 volts cost is $1093 usd.
Nominal Voltage: 1.2 Volts (per cell)
Charging Voltage: 1.65 Volts (per cell)
Efficiency: 80%
Cycle Life: 11,000 Cycles At 80% Depth of Discharge
Float Life / Shelf Life: 30 Years / 85 Years
Optimum Charge & Discharge Current: C/4
Minimum Charging Current: C/20
Maximum Continuous Charging Current: C/2
Maximum Discharge Current: C/2
Self-Discharge Rate: 1% per day
Operating Temperature: -30? C To +60? C (-22? F To +140? F)
Warranty: 10 years pro-rated
