EcoFlow 220W Bifacial Portable Solar Panel vs Goal Zero Boulder Briefcase
Pick the EcoFlow 220W if you want more power per pound and can use the bifacial gain. Pick the Goal Zero Boulder Briefcase if you want a rigid, glass-and-aluminum panel that shrugs off rough handling. The EcoFlow 220W is the only one of the two with a price on record here; the Boulder Briefcase has no listed price at any store, so compare quotes before you commit.
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Choose the EcoFlow 220W Bifacial Portable Solar Panel if you want a folding 220 W panel at 9.5 kg with a kickstand case and a rear face that can add output from reflected light.
- 220 W from a panel that folds to about 2.5 cm thick
- Bifacial rear face can add output from snow, sand or a reflective ground sheet
- 23% conversion efficiency is high for a portable panel
- Kickstand case sets the tilt angle without extra hardware
What separates them
| EcoFlow 220W Bifacial Portable Solar Panel | Goal Zero Boulder Briefcase | |
|---|---|---|
| Cell type | Bifacial, collects light on the front and rear | Monocrystalline behind tempered glass |
| Rated power | 220 W | 100, 200 or 300 W depending on the model |
| Weight and packability | 9.5 kg, folds into a kickstand case | Rigid frame, roughly 1.75 in thick, not a folding pack |
| Efficiency | 23% | Not published for the Boulder line |
| Mounting | Kickstand case, adjustable angle | Rigid frame for flat or fixed mounting |
| Durability | Flexible laminated surface | Tempered glass and aluminum, more resistant to abrasion |
| Output voltage | 18.4 V Vmp, 8.8 A short-circuit | 12 V nominal, 7 A |
Price history
- EcoFlow 220W Bifacial Portable Solar Panel: lowest $399.00 on Nov 1 at Amazon.
- Goal Zero Boulder Briefcase: lowest $149.95 on Nov 2 at TacomaBeast.
Prices at every store
EcoFlow 220W Bifacial Portable Solar Panel
- AmazonCheck price at Amazon
- B&H Photo-Video AudioCheck price at B&H Photo-Video Audio
Goal Zero Boulder Briefcase
- Backcountry.comCheck price at Backcountry.com
- B&H Photo-Video AudioCheck price at B&H Photo-Video Audio
- BobleisureCheck price at Bobleisure
Specs compared
| Spec | EcoFlow 220W Bifacial Portable Solar Panel | Goal Zero Boulder Briefcase |
|---|---|---|
| Voltage | 18.4V (Vmp) | 12V |
| Wattage | 220 W | 100W |
| Amperage | 8.8 A (Rear, Short circuit current) | 7 amperes |
| Conversion Efficiency | 23% | — |
| Battery Capacity | 50Ah extendash200Ah (range of compatible lithiu… | — |
| Electrical Current | 12A | — |
| Electrical Efficiency | 23% | — |
| Solar Panel Wattage | 220 W | — |
| Solar Panel Type | Bifacial | — |
| Solar Panel Voltage | 18.4V (Vmp) |
What reviewers say
EcoFlow 220W Bifacial Portable Solar Panel
Owners of EcoFlow's bifacial panels generally report solid charging performance in direct sun and like the built-in kickstand. The common complaints are weight and bulk for portability, and real-world output below the 220W rating unless conditions are ideal.
- OutputMixedOwners see good charging in full sun but rarely the full 220W.
- Bifacial gainPraisedThe rear face adds measurable watts when set over light, reflective ground.
- WeightCriticisedAt 9.5 kg it is heavy to carry far from the car.
Questions and answers
- Which is better for camping?
- The EcoFlow 220W. It folds into its kickstand case at 9.5 kg and sets up at an angle in seconds. The Boulder Briefcase is rigid and better left mounted.
- Which lasts longer outdoors?
- The Boulder Briefcase. Tempered glass over aluminum resists scratches, hail and UV far better than a flexible laminated panel.
- Is the EcoFlow worth the extra over a 100 W Boulder?
- Yes if you need the watts. 220 W at 23% efficiency charges a power station roughly twice as fast as a 100 W panel in the same sun.
- Can I mount either one permanently?
- The Boulder Briefcase is built for it, with a rigid frame for roof or rack mounting. The EcoFlow is meant to be folded up and moved.
- Do both work with the same power stations?
- Check the voltage. The EcoFlow runs at 18.4 V Vmp, which suits most portable power stations; the Boulder's 12 V output fits small 12 V systems.