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Key Points

Key Takeaways

  • 1

    Power to the People

  • 2

    Storage (EcoFlow Delta Pro 3): Capacity 4kWh, Output 4000W. 'Home Mobile Battery' that can easily run microwave and air conditioner.

  • 3

    Generation (Solar): With 4 foldable panels, can fully charge in 1 day on sunny days. Balcony becomes power plant.

  • 4

    Integration: Switches to battery power in 20ms during power outage (EPS function). Does not drop desktop PC or server.

  • 5

    ROI: Using 'Peak Shift' to charge at night when electricity is cheap and use during day when it's expensive, pays for itself in a few years.

Introduction: Raising Energy “Self-Sufficiency Rate”

Water, Gas, Electricity. Our lifelines are held by others. However, only electricity has become possible to “Generate” and “Store” at individual level.

This is not a story about disaster prevention. It is a story about “Democratization of Energy”.

1. The Monster Battery: EcoFlow Delta Pro 3

It is too huge to call “Portable Power Supply”, but it has tires so it can be moved.

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EcoFlow DELTA Pro 3

Adopting lithium iron phosphate battery, life is over 10 years (4000 cycles). Capacity 4096Wh corresponds to 2 days worth of power consumption for general single household. Charge/discharge can be finely controlled from app, and can also link with Home Assistant.

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EPS (Emergency Power Supply)

For engineers using desktop PCs and NAS, power outage is fatal. Just by sandwiching Delta Pro 3 between wall outlet and PC, it functions as UPS (Uninterruptible Power Supply). Switching time is less than 20ms. PC does not drop.

2. The Solar Alternative: Jackery

If you emphasize portability outdoors, Jackery’s “Plus” series is excellent.

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Jackery Solar Generator 2000 New

Lighter and more compact than EcoFlow. Solar panel conversion efficiency is high, generating power tenaciously even on cloudy days. If main use is camping or sleeping in car, this is easier to handle.

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3. Comparison: “Stationary” vs “Portable”

項目 EcoFlow Delta Pro 3 Jackery 2000 New
Capacity 4096Wh (Expandable) 2042Wh (Expandable)
Rated Output 4000W (200V OK) 2200W
Portability Heavy (Approx 50kg) Carryable (Approx 18kg)
Charging Speed Explosive (X-Stream) Fast

4. Strategy: Earn with Peak Shift

Depending on power company, there are time-of-use rate plans.

  1. Night: Charge EcoFlow from outlet at midnight (20 yen/kWh).
  2. Day: Unplug outlet during day (30 yen/kWh) and work with EcoFlow power.

Furthermore, if you combine solar panels, daytime electricity becomes “Free”. Running home server (N100) with StartOS installed entirely on solar power. This is the “Solar Punk” engineer lifestyle.

Conclusion: Make Your Home a “Fortress”

Self-supplying energy leads to mental stability. “Even if power line is cut, my PC won’t stop.” That confidence supports creative challenges.

# energy # ecoflow # jackery # solar # off-grid # 2026