Measure
Prioritise which circuits or devices genuinely need backup (router, refrigerator, some lighting) rather than assuming whole-apartment coverage
PORTABLE POWER USE CASE
Portable power for apartment backup
Adjust the workload, backup duration, conversion efficiency, reserve and surge requirement before comparing products.
Pricing checked 15 July 2026Last checked 2026-07-15 · verify decisive terms directly
NU
Research profileIndependent dataRuntime and capacity estimator
Demonstration dataMINIMUM MODELLED CAPACITY3,661 Wh
✓ 1800 W output or higher
✓ 8.4–9.4 hours from an equal-size rated battery
✓ Large / expandable class
✓ Size solar from realistic daily input, not panel nameplate alone
Compare portable power stations →BEFORE YOU COMPARE
Assumptions that matter
Usable energy
Continuous output must clear your refrigerator's compressor surge if it is part of the backup plan
Output
A larger or expandable-class station is typically needed for multi-device apartment backup versus single-device use
Compatibility
Confirm UPS/transfer-time behaviour if any connected device cannot tolerate even a brief power gap
Suitable current starting points
No normalized product safely clears every default
Reduce the load, add recharge, or evaluate a larger expandable system.
Potentially undersized
DELTA 2
Its capacity or output is below the conservative default model. Recalculate with measured loads.
DELTA 3 1500
Its capacity or output is below the conservative default model. Recalculate with measured loads.
RIVER 3 Plus
Its capacity or output is below the conservative default model. Recalculate with measured loads.
TECHNICAL AND SAFETY GUIDANCE
What changes the result
Battery chemistry
LiFePO₄ commonly prioritizes cycle life and thermal stability. Manufacturer cycle claims use controlled conditions.
Solar charging
Panel nameplate watts are not daily energy. Allow for shade, angle, heat, cable loss and controller limits.
Country voltage
Buy the regional output version and confirm appliance voltage, plug shape, frequency and warranty geography.
Air travel
Passenger limits make nearly every station in this catalogue unsuitable for aircraft carriage.
UPS claims
Transfer time and waveform matter. Do not treat a consumer EPS as medical or zero-transfer infrastructure.
Safe use
Keep ventilation clear, avoid moisture and damaged cables, and follow manufacturer temperature and grounding instructions.
APARTMENT BACKUP POWER QUESTIONS
Frequently asked questions
No. It is a planning range based on entered watts and efficiency. Temperature, standby draw, power factor and battery controls change real results.