Head-to-head test
EcoFlow DELTA 2 Max vs Goal Zero Sherpa 100PD
Real-world runtimes, scenario verdicts, and ownership costs compared — which wins for your use case.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 2 Max
4,071Power Score · Appliance Class
$949.00 list · direct from EcoFlow
Goal Zero
Sherpa 100PD
793Power Score · Device Hub
$199.95 list · direct from Goal Zero
Spec deltas
The EcoFlow DELTA 2 Max (2,048Wh) and Goal Zero Sherpa 100PD (95Wh) sit in different weight classes. The real question: do your power needs justify the larger unit, or would you be overpaying for capacity that sits unused? The DELTA 2 Max has a slight edge, but the margin is close enough that your use case should break the tie.
What the spec gap means in practice: the DELTA 2 Max's 2,400W inverter has the headroom for a window AC, a full-size fridge, and power tools. The Sherpa 100PD's 100W inverter can't start the heaviest of those — a window AC or a high-surge power tool will trip it. On stamina, the DELTA 2 Max keeps a fridge alive for roughly 12 hours vs the Sherpa 100PD's 1 hours. The cost? Portability. At 50.7 lbs, the DELTA 2 Max is heavy enough to make you think twice about moving it. The Sherpa 100PD at 1.5 lbs is something one person can actually carry.
Pick the DELTA 2 Max if your primary use is 8-hour blackout or cpap overnight. Go with the Sherpa 100PD if its specific strengths below line up better with your use. Most buyers stop at the sticker price and miss this: over a full lifespan the DELTA 2 Max works out to about $0.15/kWh against the Sherpa 100PD's $4.22, a gap that compounds in the DELTA 2 Max's favor the more you cycle it. Keep scrolling for the full breakdown. The scenario verdicts below hold a few surprises.
Bench Notes
What each unit does well, where it falls short, and the trade-offs that matter.
EcoFlow DELTA 2 Max
With a massive 2,400W output (and 4,800W surge), the DELTA 2 Max can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 50.7 lbs, this is not a unit you want to carry far. It's best suited as a stationary backup or RV companion. A standout feature is the value proposition: at roughly $0.46 per watt-hour, it's one of the most cost-effective options on the market.
Strengths
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
- +Faster solar charging
- +Rated for 3,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$749.1) than the Sherpa 100PD.
- –Significantly heavier (+49.2 lbs), making it harder to move.
Goal Zero Sherpa 100PD
At 100W, this unit is strictly for personal electronics (phones, laptops) and small CPAP machines. Do not expect to run kitchen appliances. At only 1.5 lbs, it is exceptionally portable. You can easily carry it one-handed to a campsite or tailgating party.
Strengths
- +Costs $749.1 less
- +Lighter by 49.2 lb
Trade-offs
- –Weaker inverter (-2,300W) limits appliance compatibility.
- –Lacks smartphone app control for remote monitoring.
- –Sealed capacity — the DELTA 2 Max can add batteries to grow past 94.7Wh; this one can't.
- –Shorter-lived battery — rated for 500 charge cycles vs the DELTA 2 Max's 3,000, so it wears out sooner.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
Neither unit can fully handle this scenario (needs 2,100Wh). You'd need a higher-capacity station or to cut back on usage.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
DELTA 2 Max
The Sherpa 100PD's 100W output can't handle the 150W peak demand. The DELTA 2 Max handles this scenario with 96Wh to spare.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
DELTA 2 Max
The Sherpa 100PD runs out of juice. It only has 80Wh usable, but this scenario needs 320Wh. The DELTA 2 Max covers it and still has 95h of phone charging left over.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
DELTA 2 Max
The Sherpa 100PD runs out of juice. It only has 80Wh usable, but this scenario needs 910Wh. The DELTA 2 Max covers it and still has 55h of phone charging left over.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
DELTA 2 Max
The Sherpa 100PD's 100W output can't handle the 400W peak demand. The DELTA 2 Max handles this scenario with 1,071Wh to spare.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit can fully handle this scenario (needs 4,685Wh). You'd need a higher-capacity station or to cut back on usage.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the six scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
Only the DELTA 2 Max can start this 205W load.
$949 list · direct from EcoFlow
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–116.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–23.2hHigh-Draw Appliances
These reveal the real limitsscale 0–1.7h¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
July 10, 2026
Verdict: the DELTA 2 Max, on Power Score margin
These two units are closely matched on individual specs, but our Power Score analysis gives the DELTA 2 Max the edge with a composite score of 4,071 vs 793.
Overall score margin: 4,071 vs 793 (+413.4%)
List prices as of July 10, 2026. The links below open EcoFlow's and Goal Zero's current prices.
$949.00 list · direct from EcoFlow
or check the Sherpa 100PD price$199.95 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated July 10, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS, RV Living, Home Backup, CPAP, Solar Generator, Tailgating, Food Truck, Apartment Balcony.
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, DELTA 2 Max rates 3.9/5 (33rd percentile of 25 Large-class units), and Sherpa 100PD rates 3.4/5 (5th percentile of 22 Personal-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
Sherpa 100PD: No App Control
Without app control, you have to physically walk to the Sherpa 100PD to check battery level, adjust settings, or monitor power draw. The DELTA 2 Max lets you do all that from your phone, including getting low-battery alerts.
Sherpa 100PD: Fixed Capacity
The Sherpa 100PD is sealed at 95Wh — fine if that covers you, but it's the ceiling. The DELTA 2 Max starts at 2,048Wh and can add expansion batteries, so if your needs may climb toward partial-home backup, it has room to grow the Sherpa 100PD doesn't.
Only the DELTA 2 Max Has UPS Protection
The DELTA 2 Max can act as an uninterruptible power supply. Plug your PC, router, or CPAP into it and it switches to battery seamlessly during an outage. The Sherpa 100PD doesn't have this feature, so connected devices will experience a power interruption.
Warranty Value Comparison
The Sherpa 100PD gives you 10 years of warranty per $1,000 spent, vs the DELTA 2 Max's 5.3 years. That's 1.9× more coverage per dollar. An underrated factor if you're keeping this unit for years.
Battery Lifespan in Real Years
The DELTA 2 Max is rated for 3,000 cycles vs 500. In real life: at daily use, that's 8.2 vs 1.4 years. At weekend use (twice a week), it's 29 vs 5 years. After hitting the cycle limit, the battery doesn't die. It drops to ~80% original capacity, which is still very usable.
Sherpa 100PD: Noise Level Not Disclosed
The DELTA 2 Max publishes its noise level (30dB), but the Sherpa 100PD doesn't. Brands that don't disclose noise specs often have louder units. If noise matters to you (CPAP users, apartment dwellers), this is worth investigating before buying.
Full record above — the Test Desk pick is the DELTA 2 Max.
Check DELTA 2 Max price →or check the Sherpa 100PD priceOwnership Analysis
What happens after you buy — true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
The Sherpa 100PD is cheaper to buy, but the DELTA 2 Max is cheaper to own. At $0.15/kWh over its lifetime vs $4.22/kWh, the DELTA 2 Max's higher cycle life and capacity make each dollar go further over the years.
Delivers each lifetime kWh for $4.07 less — check the DELTA 2 Max price →
Brand trust
EcoFlow
Ecosystem
Largest in portable power — 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US-based phone/email/chat support (1-800-368-8604). Experiences are polarized — many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. Supports up to 180kWh modular expansion with DELTA Pro Ultra X.
Worth knowing
The Oct 2025 DELTA Max 2000 recall (overheating/fire risk, 6 incidents) is worth noting. Also tested subscription paywalls for advanced app features in early 2025 before community backlash paused the plan. No parts or service offered out of warranty.
Goal Zero
Ecosystem
Focused — 5-6 active portable power station models across Yeti and Yeti Pro series, plus Alta coolers, Nomad/Ranger solar panels, and vehicle integration kits
Support
US-based company (Salt Lake City, owned by NRG Energy). Historically considered premium support, but 2025-2026 reports describe long wait times, unresponsive email communication, and tickets going unaddressed for weeks. The "premium support justifies premium pricing" argument is weakening.
Community
Small but loyal — strong following in overlanding and preparedness communities. Official community forums were recently shuttered, frustrating long-time users.
App experience
Rated 4.4/5 iOS (~1,200 ratings) but recent reviews skew negative — recurring connectivity issues, crashes, and stability problems.
Unique strength
Pioneer of the portable power market — strongest brand heritage. US-based company with ruggedized, weather-resistant designs (IPX4). Integrated "Yeti-Ready" ecosystem with coolers, lights, and vehicle kits.
Worth knowing
Widely acknowledged as the most expensive brand (lowest Wh per dollar). Support quality has declined from its "premium" standard. Perceived as competitively stagnant vs. faster-innovating Chinese competitors. Reliability reports on newer models are concerning.
Analyst note
EcoFlow and Goal Zero are close competitors. Both have established support channels and growing ecosystems. Compare their specific warranty terms and community size for your peace of mind.
Growth path
DELTA 2 Max
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 2,048Wh.
Accepts up to 1,000W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
Sherpa 100PD
FIXED CAPACITYFixed at 95Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 20W of solar. Limited to a single portable panel.
Limited ports. You'll likely need a power strip or splitter.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
The Sherpa 100PD is sealed at 95Wh, which is fine if that covers you. The DELTA 2 Max starts at 2,048Wh and can grow beyond it with EcoFlow expansion batteries — real headroom the Sherpa 100PD doesn't have if your needs climb toward partial-home backup.
The Bottom Line
The full picture comes down to this. The DELTA 2 Max edges ahead on our overall analysis, but the margin is narrow enough that your specific use case should drive the decision. Review the scenario verdicts above — if the Sherpa 100PD wins in the scenarios that match your life, it's the right choice regardless of aggregate scores.
If neither the DELTA 2 Max nor the Sherpa 100PD feels like the right fit, your power needs probably sit outside what these two target. Use our comparison tool above to explore alternatives that better match your specific wattage and runtime requirements. Prices on portable power stations fluctuate frequently. Both EcoFlow and Goal Zero discount regularly, so check the current price before committing. Prime Day and Black Friday pricing typically drops 20-30%.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the DELTA 2 Max worth $749.1 more than the Sherpa 100PD?
The short answer: yes, if you'll actually use the extra capability. The DELTA 2 Max costs $749.1 more, but that premium buys you 1,953.3Wh more battery capacity (that's 11 extra hours of running a mini-fridge); 2,300W higher AC output (opening the door to more demanding appliances); a longer-lasting battery rated for 3,000 cycles — that's 8 years at daily use; 980W faster solar charging for quicker off-grid recovery. On a cost-per-watt-hour basis, you're paying $0.46/Wh vs $2.11/Wh. Factor in cycle life and the math flips: the DELTA 2 Max costs $0.15/kWh over its lifetime vs $4.22/kWh. The "expensive" unit is actually cheaper to own. For regular use, we'd pay the premium.
How does the 1,953.3Wh capacity difference actually affect daily use?
The DELTA 2 Max's 2,048Wh battery keeps a mini-fridge running for roughly 12 hours vs the Sherpa 100PD's 1 hours. Where it really matters: during an 8-hour blackout running your fridge, router, lights, AND charging your phone simultaneously (about 1,645Wh total), the DELTA 2 Max handles it while the Sherpa 100PD runs dry. What specs don't mention: runtime drops 20-30% in cold weather (below 32°F/0°C) as battery chemistry slows down. The DELTA 2 Max's extra capacity provides a critical cold-weather buffer. For occasional phone and laptop charging, both are overkill. This gap only matters for sustained, multi-appliance use.
Can I actually carry the DELTA 2 Max, or is the Sherpa 100PD the only portable option?
The Sherpa 100PD at 1.5 lbs is genuinely grab-and-go. Toss it in a backpack, carry it one-handed to a picnic, take it on a boat. The DELTA 2 Max at 50.7 lbs is a different story. It's like carrying a large suitcase full of books. If you're setting up and breaking down camp frequently, this weight difference will exhaust you by day two.
How fast can each unit recharge from solar panels in real conditions?
On paper, the DELTA 2 Max accepts 1,000W vs the Sherpa 100PD's 20W of solar input. What the spec sheet won't tell you: solar panels typically deliver only 60-80% of their rated output due to panel angle, cloud cover, and temperature. In realistic conditions, expect full recharge in about 2.9 hours for the DELTA 2 Max and 6.8 hours for the Sherpa 100PD. That gap widens on cloudy days, when the DELTA 2 Max's higher input ceiling captures more of whatever sunlight is available. One more thing: summer gives you ~7 productive solar hours per day. Winter drops to ~4. If solar is your primary recharge method, the DELTA 2 Max's advantage is substantial.
"3,000 vs 500 cycles" — what does that actually mean for me?
In real years: the DELTA 2 Max (3,000 cycles) lasts 8.2 years at daily use, 29 years at weekend use (twice a week), or 125 years at twice-monthly camping trips. The Sherpa 100PD (500 cycles): 1.4 years daily, 5 years weekends, or 21 years twice-monthly. What most people miss: hitting the cycle limit doesn't kill your battery. Capacity drops to about 80%. Your 2,048Wh unit becomes a ~1,638Wh unit. Still very usable. For weekend users, both batteries will outlast the warranty by years.
Can I use the DELTA 2 Max as a home UPS to protect my electronics during blackouts?
Yes. The DELTA 2 Max has UPS mode with true 0ms switchover (double-conversion). Even hospital-grade equipment won't notice. Plug in your desktop PC, router, NAS, or CPAP machine and it switches to battery seamlessly when the grid drops. The Sherpa 100PD does not have this feature. Without UPS, a blackout means: your PC reboots (potentially corrupting unsaved work), your NAS may corrupt its drive array, your CPAP alarms and wakes you up, and your security cameras go dark until you manually switch them over. If always-on power protection matters, this is a dealbreaker advantage for the DELTA 2 Max.
What if I need more capacity than the Sherpa 100PD's 94.7Wh later?
The Sherpa 100PD is sealed at 94.7Wh, so if you expect your needs to climb, the DELTA 2 Max is the more future-proof pick: it starts at 2,048Wh and adds EcoFlow-compatible batteries without replacing the base unit. That said, "not expandable" isn't a flaw on its own — if 94.7Wh comfortably covers your loads, the Sherpa 100PD is a complete unit, not a downgrade.
Is EcoFlow or Goal Zero more reliable for long-term ownership?
Both brands have strengths and trade-offs. EcoFlow: Mixed. 2-5 years depending on model (DELTA Pro Ultra line gets 10 years). Some users report smooth claims; others report runarounds. Register your product to extend coverage. Goal Zero: 5 years on LFP models, 2 years on older NMC models. Battery must be charged within 7 days of purchase and every 6 months to maintain warranty (strict). Product reliability concerns have increased — repeat "Battery Fault" errors reported even on newer Yeti Pro 4000. One piece of advice from the power station community: regardless of brand, buy from Costco or Amazon. Their return policies provide a safety net that manufacturer warranties alone can't match, especially for a product you'll rely on in emergencies. Both brands use LFP (lithium iron phosphate) batteries in their current lineup, the most proven chemistry for longevity and safety.
Bottom line: should I buy the DELTA 2 Max or the Sherpa 100PD?
We'd pay the premium for the DELTA 2 Max. Yes, it costs more. The capability jump is real: you're stepping into a tier that handles appliances the base model can't start. The Sherpa 100PD is still solid if budget is the priority, but the DELTA 2 Max will leave you less likely to wish you'd "gone bigger" six months from now. That regret costs more than the price difference.
Where to buy
EcoFlow DELTA 2 MaxPick
$949.00
$949.00 list · direct from EcoFlow
Goal Zero Sherpa 100PD
$199.95
$199.95 list · direct from Goal Zero
Prices may vary by retailer and are subject to change.