Battery Degradation Curves

Cycle and calendar degradation modeling with augmentation strategies

Battery Chemistry

Lithium Iron Phosphate (LFP)

Cycle Life:6000

Calendar:15y

RTE:92%

Cost:$95/kWh

Usage Profile

Cycles per Year

Typical: 300-500 for arbitrage, 1,000+ for frequency response

Depth of Discharge (%)

Project Life (years)

Initial Capacity (MWh)

Advanced Settings

Augmentation Strategy

Strategy Type

Trigger Capacity (%)

Augment before reaching this threshold

Augmentation Size (%)

Years to 70%

years

Average SOH

74.5%

over 15y

Revenue Lost

$322k

to degradation

Net Benefit

$-1.0M

from augmentation

Capacity Retention Curve

State of Health over project lifetime (with augmentation)

Lifetime Revenue Impact

NPV of annual revenue with and without degradation (7% discount rate)

Strategy Comparison

NPV analysis of different augmentation approaches

Strategy	NPV	Aug. Cost	Final SOH
No Augmentation	$1.2M	$0	55.0%
Proactive	$-116k	$1.5M	80.3%
Reactive	$-8k	$1.3M	91.2%

Recommendation: Augmentation is not cost-effective for this scenario. Let battery degrade naturally.

Key Insights

At 365 cycles/year, LFP will reach 80% SOH in approximately 15 years
Total throughput over 15 years: 721 GWh
Proactive augmentation at year 6, 10 adds 30 MWh for $2,052,763

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