Industry data suggests K-12 schools replace
15-35% of their AC adapters every year due to loss or damage.— Aggregated K12 Tech Reports, 2022-2024
Your District’s Hidden Charging Cost Calculator
Most districts still rely on bulky AC adapters that waste energy, money, and
class time. Quick-Sense™
USB-C charging replaces every brick with one smart hub—cutting waste and keeping devices ready all day.
Run the live calculator below to see the real hidden costs.
Powered by JAR Research using open, real-world data.
Switching to USB-C
could reduce annual hidden costs by $0.00 per device.
For your0 devices, this is a total potential saving of $0 annually, and $0 over 5 years.
Your
5-Year Cost Comparison
Current (AC Adapters):
$0
Efficient (USB-C Solution):
$0
Detailed Cost & Lifespan
Impact
1-Year Direct Cost Breakdown
Cost Item (Annual)
Current (AC)
USB-C Solution
Savings
🔌AC Adapter Replacement
$0
$0
$0
⚡Energy Waste
$0
$0
$0
📅Shortened Device Lifespan Cost
$0
$0
$0
Total Annual Direct Costs
$0
$0
$0
5-Year Direct Cost Breakdown
Cost Item (5-Year)
Current (AC)
USB-C Solution
Savings
🔌AC Adapter Replacement
$0
$0
$0
⚡Energy Waste
$0
$0
$0
📅Shortened Device Lifespan Cost
$0
$0
$0
Total 5-Year Direct Costs
$0
$0
$0
Direct Cost Visualization
The following charts illustrate the estimated direct costs (pink)
versus the potential with an efficient USB-C solution (blue). Each chart compares annual and 5-year
projections. The annotation highlights the savings. (These costs contribute to the "Total Annual Hidden
Costs".)
Adapter Replacement Cost
Annual$0 saved
$0
$0
CurrentUSB-C
5-Year$0 saved
$0
$0
CurrentUSB-C
Energy Waste Cost
Annual$0 saved
$0
$0
CurrentUSB-C
5-Year$0 saved
$0
$0
CurrentUSB-C
Shortened Device Lifespan Cost
Annual$0 saved
$0
$0
CurrentUSB-C
5-Year$0 saved
$0
$0
CurrentUSB-C
Time Lost & Productivity Impact
1-Year Time Loss Breakdown
Time Category
Current (AC)
USB-C Solution
Savings/Reduction
💻IT Staff Time
0 days0 hrs$0
0 days0 hrs$0
0 days0 hrs$0
Teacher Time
0 days0 hrs$0
0 days0 hrs$0
0 days0 hrs$0
🎓Student Lost Learning
0 hrs0.0 hrs/std
0 hrs0.0 hrs/std
0 hrs0.0 hrs/std
5-Year Time Loss Breakdown
Time Category
Current (AC)
USB-C Solution
Savings/Reduction
💻IT Staff Time
0 days0 hrs$0
0 days0 hrs$0
0 days0 hrs$0
Teacher Time
0 days0 hrs$0
0 days0 hrs$0
0 days0 hrs$0
🎓Student Lost Learning
0 hrs0.0 hrs/std
0 hrs0.0 hrs/std
0 hrs0.0 hrs/std
Time Impact Visualization
These charts show current time losses versus an efficient USB-C
solution. Bars highlight the time your staff and students could reclaim annually and over five years.
IT Staff Time
Annual0d saved
0d
0d
CurrentUSB-C
5-Year0d saved
0d
0d
CurrentUSB-C
Teacher Time
Annual-0 days
0d
0d
CurrentUSB-C
5-Year0d saved
0d
0d
CurrentUSB-C
Student Instructional Time
Annual0 hrs saved
0h
0h
CurrentUSB-C
5-Year0 hrs saved
0h
0h
CurrentUSB-C
5-Year Charging Cart TCO
Comparison
Compare the 5-year total cost of ownership for your current cart fleet
versus a JAR Systems USB-C cart deployment.
$
$
Competition (AC)
$0
JAR Systems USB-C
$0
5-Year Savings
$0
Assumes 0 devices across 0 carts (30 devices/cart).
Cart cost inputs: Competition cart at $1,650,
JAR Systems cart at $2,150.
Year
Competition TCO
JAR Systems TCO
Savings
Year 0
$0
$0
$0
Year 1
$0
$0
$0
Year 2
$0
$0
$0
Year 3
$0
$0
$0
Year 4
$0
$0
$0
Year 5
$0
$0
$0
Annual Operational Cost Breakdown (for 0 carts)
This shows the
estimated recurring costs *per year* to operate your carts. The 5-Year TCO above is the initial
purchase cost plus this annual operational cost compounded over 5 years.
Annual Cost Component
Competition (AC)
JAR Systems (USB-C)
Annual Savings
🔌Hardware Costs
$0
$0
$0
⚡Energy & Lifespan Costs
$0
$0
$0
👥Staff Time Costs (IT)
$0
$0
$0
Total Annual Operational Cost
$0
$0
$0
Per-Port Operating Cost Analysis
Enter your total charging ports to see detailed cost breakdowns by
category.
AC Solution
$0.00
per device/year (total)
USB-C Solution
$0.00
per device/year (total)
You Save
$0.00
(0% reduction)
5-Year Total Savings
(1,000 ports)
Year
AC Cost
USB-C Cost
Savings
Cumulative
Year 1
$0
$0
$0
$0
Year 2
$0
$0
$0
$0
Year 3
$0
$0
$0
$0
Year 4
$0
$0
$0
$0
Year 5
$0
$0
$0
$0
Total
$0
$0
$0
—
Adapter Replacement Costs: Lost, damaged, or broken
adapters that need replacement.
AC Adapters
$0.00
per device/year
USB-C
$0.00
per device/year
Savings
$0.00
(0%)
5-Year Fleet Savings:$0
IT Staff Time: Hours spent troubleshooting charging
issues, managing adapters, and support tickets.
AC Setup
$0.00
per device/year
USB-C
$0.00
per device/year
Savings
$0.00
(0%)
5-Year Fleet Savings:$0
Teacher Instructional Time: Class time lost
to device charging disruptions.
AC Setup
$0.00
per device/year
USB-C
$0.00
per device/year
Savings
$0.00
(0%)
5-Year Fleet Savings:$0
Device Lifespan Extension: Value from reduced battery
damage and extended device life with proper charging.
AC (Damage)
$0.00
per device/year
USB-C
$0.00
per device/year
Savings
$0.00
(0%)
5-Year Fleet Savings:$0
Context: Districts using AC adapters typically lose
10-35% of their adapter inventory annually due to loss, damage, or breakage.
Per-Port TCO Calculation Methodology
🔌 Adapter Replacement Costs
AC Cost/Device = AdapterLossRate × AdapterCost
= 20% × $35 = $7.00/device/year
USB-C Cost/Device = $0
Centralized charging eliminates individual adapter loss entirely.
🛠️ IT Labor Costs
AC Cost/Device = (ITHoursPer1kDevices ÷ 1000) × ITHourlyRate
= (30 ÷ 1000) × $45 =
$1.35/device/year
USB-C Cost/Device = AC × (1 - ITTimeReduction)
= AC × (1 - 75%) = $0.34/device/year
👩🏫 Teacher Instructional Time
AC Cost/Device = (TeacherHrsPerTeacher ÷ StudentsPerTeacher) × TeacherRate
= (12 ÷ 25)
× $42 = $20.16/device/year
USB-C Cost/Device = AC × (1 - TeacherTimeReduction)
= AC × (1 - 80%) = $4.03/device/year
💻 Device Lifespan Extension
AC Cost/Device = DeviceCost × AnnualBatteryDamageRate
= $350 × 8% = $28.00/device/year
USB-C Cost/Device = AC × (1 - LifespanMitigation)
= AC × (1 - 70%) = $8.40/device/year
📊 Total Combined (Overview)
Total AC = Adapters + IT + Teacher + Lifespan
= $56.51/device/year
Total USB-C = (same categories)
= $12.77/device/year
Savings = Total AC - Total USB-C
= $43.74/device/year (77% reduction)
How Your District Compares
Loading benchmark…
Set your district inputs to instantly
see how hidden charging costs stack up against similar districts.
Hidden Cost per Student
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Typical peer range:
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Hidden Cost per Device
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Typical peer range:
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Adapter Loss Rate
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Typical peer range: —
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Default Reference Data & Sources
These are the default values used in calculations, based on K12 research (2022-2025). Your inputs will override
defaults for relevant fields. For detailed calculation steps, use the "Show Calculation" links under each
result.
This calculator is based on aggregated research and typical scenarios. Actual
costs and savings may vary for your specific district. We recommend a personalized consultation for precise
planning.
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