INDEPENDENT PORTABLE POWER TELEMETRY LAB · CONTROLLED 0.2C/0.5C LOAD BENCHMARKS · ZERO SPONSORED BIAS
CHROMA 63800 ELECTRONIC LOAD CERTIFIED UPDATED: OCT 2026
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2026 PORTABLE POWER TELEMETRY & BENCHMARK LAB

Measured Usable Watt-Hours. Zero Marketing Inflation.

We load-test every 1,000Wh–5,000Wh LiFePO4 portable power station down to BMS cutoff to measure net AC inverter efficiency, MPPT solar curve speed, and real $/Wh cost.

#1 $/WH VALUE AWARD · 9.4/10

OUPES Mega 2 Pro (2,048Wh)

1,831Wh Usable (89.4%) · 2,500W AC · $0.34/Wh
 #1 DUAL-MPPT EFFICIENCY · 9.3/10

EcoFlow DELTA 2 Max (2,048Wh)

1,868Wh Usable (91.2%) · 2,400W AC · 1,000W Solar
 #1 RV 30A INTEGRATION · 9.2/10

BLUETTI AC200L (2,048Wh)

1,845Wh Usable (90.1%) · 2,400W AC · 1,200W Solar
INTERACTIVE ENGINEERING TOOL · V4.2

Appliance Runtime & Solar Array Sizer

Models real DC-to-AC inverter conversion loss, BMS low-voltage cutoff reserve, and 18W continuous fan/idle overhead.

Continuous Appliance Load (Watts) 150 W
Connected Foldable Solar Array (Rated Watts) 480 W (2×240W)
TELEMETRY: OUPES MEGA 2 PRO (2,048WH) $0.38 / Usable Wh
Measured Usable 1,831Wh
Net Runtime 10.9Hrs
Solar 0–100% 4.7Hrs
LIFEPO4 DISCHARGE VOLTAGE & STATE-OF-CHARGE CURVE 150W Load + 18W Inverter Overhead
100% 50% 0%
FORMULA: Wh_usable / (Load_W + 18W_idle) AC INVERTER EFFICIENCY: 89.4%
HEAD-TO-HEAD BENCHMARK SHOOTOUT · 2,048WH CLASS

OUPES Mega 2 Pro vs EcoFlow DELTA 2 Max vs BLUETTI AC200L

Read Full 3-Way Lab Report →
TEST PROTOCOL V4.2
2,048Wh LiFePO4 Flagship Telemetry
OUPES Mega 2 Pro
LAB SCORE: 9.4 / 10
OUPES Mega 2 Pro
EcoFlow DELTA 2 Max
LAB SCORE: 9.3 / 10
EcoFlow DELTA 2 Max
BLUETTI AC200L
LAB SCORE: 9.2 / 10
BLUETTI AC200L
Measured Usable Capacity (Wh)0.2C 400W Pure Sine Discharge @ 25°C
1,831 Wh (89.4%)
1,868 Wh (91.2%) WINNER
1,845 Wh (90.1%)
Continuous AC Output / Peak SurgePure Sine Wave THD < 2.1%
2,500W / 5,400W WINNER
2,400W / 4,800W
2,400W / 3,600W Lift
Verified Cost Per Usable Wh ($/Wh)Street Price Divided by Measured Usable Wh
$0.38 / Usable Wh ($699) BEST VALUE
$0.75 / Usable Wh ($1,399)
$0.70 / Usable Wh ($1,299)
Max MPPT Solar Input & Charge Time0–100% Under Prime Irradiance
800W (2.8 Hrs)
1,000W Dual-MPPT (2.3 Hrs)
1,200W MPPT (1.9 Hrs) FASTEST
UPS Switchover Latency & Noise @ 1mOscilloscope Cutover Test
16.4 ms · 44 dBA
18.2 ms · 46 dBA
15.8 ms · 45 dBA WINNER
PUBLISHED LAB BENCHMARKS, VS SHOOTOUTS & SIZING PLAYBOOKS

Latest Telemetry Reports & Head-to-Head Matchups

LAB TELEMETRY REPORT

Portable Power Station in Cold Weather: Why It Can Run but Won’t Charge

A portable power station can run below freezing yet refuse to recharge. Check the cold-weather charging limits for two popular models before…

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LAB TELEMETRY REPORT

150V High-Voltage MPPT vs 60V Low-Voltage Solar Controllers: Why Series PV Wins

Line-loss telemetry across 50ft 10AWG solar extension runs comparing 120V series strings against 40V parallel arrays.

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LAB TELEMETRY REPORT

2026 Appliance Watt-Hour Runtime Dataset: Fridge, CPAP, Starlink Gen 3 & Sump Pump

Measured 24-hour energy consumption (Wh/day), compressor duty cycles, and inverter idle losses across 18 common household and RV appliances.

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LAB TELEMETRY REPORT

PECRON F5000LFP vs OUPES Mega 5: 5kWh Heavy-Duty Rolling Battery Shootout

Lab test of two sub-$2,200 5kWh LiFePO4 monsters under a 3,500W continuous workshop and home backup load.

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LAB TELEMETRY REPORT

OUPES Guardian 6000 V2 vs EcoFlow DELTA Pro 3: 240V Split-Phase Home Backup Benchmark

Testing 240V L14-30R transfer switch compatibility, 1 HP deep-well pump inrush surge, and $/Wh economics in the 4kWh–6kWh whole-home class.

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LAB TELEMETRY REPORT

Jackery HomePower 2000 Plus v2 vs OUPES Mega 2 Pro: Weight, Efficiency & Solar Speed

Does Jackery's 39.5 lb CTB chassis justify a $300 price premium over the 2500W OUPES Mega 2 Pro? Full lab discharge and…

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LAB TELEMETRY REPORT

OUPES Mega 2 Pro vs EcoFlow DELTA 2 Max vs BLUETTI AC200L: 2048Wh Lab Shootout & Telemetry

Controlled 0.5C (1000W) AC discharge efficiency, MPPT solar voltage ceiling, UPS switchover oscilloscope traces, and $/Wh value analysis across the top three…

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WattHourLab

Independent portable power station discharge telemetry lab, interactive appliance runtime & solar array sizer studio, and head-to-head LiFePO4 shootouts.