WattHourLab Telemetry Archive
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 an outage.
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.
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.
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.
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.
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 acoustic benchmarks.
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 2048Wh LiFePO4…