Quick Take
If you want one mid-size unit that does almost everything, choose EcoFlow DELTA 2: 1,024 Wh capacity, ~1-hour AC recharge, and a robust 1,800 W peak / 1,600 W rated inverter in a 27 lb body. Prefer simple controls and lower weight? EcoFlow DELTA mini (882 Wh) is easy to carry. For LiFePO₄ longevity in the ~700–800 Wh range, BLUETTI EB70S (716 Wh) and BLUETTI AC70 (768 Wh, 22.5 lb) are excellent. Anker 555 PowerHouse (1,024 Wh) adds long warranty support, Jackery Explorer 1000 Pro (1,002 Wh) is a mainstream favorite, and Goal Zero Yeti 1000 Core (983 Wh) integrates cleanly with fridge-friendly 12 V gear.
Introduction
“Mid-size” here means ~700–1,200 Wh capacity and roughly 20–35 lb. This class is ideal for car-accessible campsites and short walks to a site: enough energy for CPAP all night, 12 V fridge through the day, and plenty of phone/camera/laptop charging without the bulk of 2 kWh home-backup units.
We focus on the things that matter at camp: usable capacity, inverter strength & reliability, AC recharge speed, weight, and real-world runtimes (CPAP, fridges, phones, laptops). Where brands don’t publish runtimes, we provide clearly labeled estimates.
Testing & Selection Process
We considered current, North America–available models from EcoFlow, BLUETTI, Jackery, Anker (SOLIX), and Goal Zero.
Sources
- Manufacturer specifications
- Independent lab/editorial reviews
- Aggregated buyer feedback from major authorized retailers
Evaluation Priorities
- Performance under load (inverter stability & surge)
- Durability (chemistry, cycle life, build)
- Recharge speed (AC 0–100%)
- Weight vs. capacity
- Value
Scoring Weights
- Performance Under Load: 30%
- Durability: 25%
- Recharge Speed: 20%
- Weight/Portability: 15%
- Value: 10%
Overall Top Picks — Mid-Size (≈700–1,200 Wh)
| Rank | Product | Capacity (Wh) | Weight (lb) | AC Output (W) | AC Recharge | Price (USD) |
|---|---|---|---|---|---|---|
| 1 | EcoFlow DELTA 2 | 1,024 | 27 | 1,600 (surge 1,800) | ~1 h | $999 |
| 2 | EcoFlow DELTA mini | 882 | 23.6 | 1,400 | ~1 h | $799 |
| 3 | BLUETTI EB70S | 716 | 21.4 | 800 (1,000 surge) | ~1.5–2 h | $599 |
| 4 | BLUETTI AC70 | 768 | 22.5 | 1,000 (2,000 surge) | ~1.5 h | $699 |
| 5 | Anker 555 PowerHouse | 1,024 | ~29.9 | 1,000 | ~2–2.5 h | $999 |
| 6 | Jackery Explorer 1000 Pro | 1,002 | 25.4 | 1,000 | ~1.8–2 h | $999 |
| 7 | Goal Zero Yeti 1000 Core | 983 | 31.7 | 1,200 | ~4.5–9 h* | $799–999 |
*Charge time varies by charger (≈120–230 W AC).
Detailed Product Reviews
EcoFlow DELTA 2
Overview
A proven 1,024 Wh LiFePO₄ platform that recharges from wall AC in about 1 hour and drives demanding camp loads with a 1,600 W inverter (1,800 W peak).
Pros
- Class-leading AC recharge speed
- Long-life LFP chemistry (thousands of cycles)
- Strong app and ecosystem compatibility
Cons
- Heavier than sub-1 kWh competitors
Best For
CPAP + fridge + devices on weekend to multi-day trips.
Why It’s Ranked Here
The most balanced mix of capacity, speed, inverter muscle, and longevity.
EcoFlow DELTA mini
Overview
At 882 Wh and ~23.6 lb, DELTA mini is the most carry-friendly model here while still delivering a 1,400 W inverter and fast AC charging.
Pros
- Lighter body for the class
- Quick AC recharge
- Solid inverter headroom
Cons
- Smaller capacity than 1 kWh peers
Best For
Short trips where carry weight matters.
Why It’s Ranked Here
Best midsize portability without giving up capable AC output.
BLUETTI EB70S
Overview
A 716 Wh LiFePO₄ unit with 800 W (1,000 W surge) inverter, straightforward interface, and good value.
Pros
- LFP longevity at a friendly price
- Practical port spread
- Manageable 21.4 lb carry
Cons
- Inverter wattage below 1 kW continuous
Best For
Everyday camp power with long battery life expectations.
Why It’s Ranked Here
Great durability-per-dollar with enough capacity for a long weekend.
BLUETTI AC70
Overview
768 Wh LFP with 1,000 W output (2,000 W “lifting power”), 22.5 lb weight, and fast AC/solar intake.
Pros
- 22.5 lb carries easily for this class
- Quick AC (≈950 W input) and 500 W solar
- LFP chemistry for cycle life
Cons
- Capacity sits below 1 kWh
Best For
Frequent campers who want fast turnarounds and LFP longevity.
Why It’s Ranked Here
Best blend of weight, recharge speed, and inverter output under 1 kWh.
Anker 555 PowerHouse
Overview
A 1,024 Wh LFP station with 1,000 W AC, long warranty support, and a robust build.
Pros
- LFP battery and 5-year warranty (brand)
- Clear LCD and generous port mix
- Strong reputation for reliability
Cons
- Heavier (~29.9 lb)
Best For
Buy-once buyers who value longevity and support.
Why It’s Ranked Here
Proven reliability plus long-life chemistry at the 1 kWh mark.
Jackery Explorer 1000 Pro
Overview
1,002 Wh NMC with 1,000 W AC, clean controls, and wide retail availability.
Pros
- Easy to find, easy to use
- Quick AC charge for an NMC pack
- Good balance of ports
Cons
- NMC chemistry has shorter cycle life than LFP
Best For
Campers who want simple, mainstream power with fast setup.
Why It’s Ranked Here
A trusted, widely available 1 kWh option with quick charging.
Goal Zero Yeti 1000 Core
Overview
983 Wh NMC with 1,200 W inverter and regulated 12 V output—excellent with portable fridges and Goal Zero accessories.
Pros
- Ecosystem accessories and service network
- Fridge-friendly regulated 12 V
- Solid build
Cons
- Heavier (31.7 lb) and slower AC charging
Best For
Users already in the Goal Zero ecosystem or prioritizing 12 V performance.
Why It’s Ranked Here
Accessory ecosystem and 12 V stability outweigh slower charging for many.
Comparative Analysis (with Runtime Estimates)
Assumptions for estimates where brands don’t publish runtimes:
Phone ≈ 12 Wh; Laptop ≈ 50 Wh; CPAP ≈ 30 W continuous; 12 V fridge ≈ 60 W @ ~40% duty (≈24 W avg). We apply typical conversion losses.
| Product | Chem. | Capacity (Wh) | Weight | AC Output | AC 0–100% | Phones* | Laptops* | CPAP 30 W* | 12 V Fridge* |
|---|---|---|---|---|---|---|---|---|---|
| EcoFlow DELTA 2 | LFP | 1,024 | 27 lb | 1,600 | ~1 h | ~68× | ~18× | ~34 h | ~40 h |
| EcoFlow DELTA mini | NMC | 882 | 23.6 lb | 1,400 | ~1 h | ~58× | ~14× | ~30 h | ~36 h |
| BLUETTI EB70S | LFP | 716 | 21.4 lb | 800 | ~1.5–2 h | ~48× | ~14× | ~24 h | ~28 h |
| BLUETTI AC70 | LFP | 768 | 22.5 lb | 1,000 | ~1.5 h | ~52× | ~15× | ~26 h | ~31 h |
| Anker 555 PowerHouse | LFP | 1,024 | ~29.9 lb | 1,000 | ~2–2.5 h | ~68× | ~18× | ~34 h | ~40 h |
| Jackery Explorer 1000 Pro | NMC | 1,002 | 25.4 lb | 1,000 | ~1.8–2 h | ~66× | ~17–18× | ~33 h | ~39 h |
| Goal Zero Yeti 1000 Core | NMC | 983 | 31.7 lb | 1,200 | ~4.5–9 h | ~65× | ~17× | ~32 h | ~38 h |
Buying Guide
- Pick capacity for nights out: ~700–900 Wh = 1–2 nights with CPAP or a day of fridge duty; ~1,000–1,200 Wh = room to spare.
- Look for fast AC charging: ≤ 2 hours keeps you flexible between drives and camp.
- Mind inverter headroom: 1,000–1,600 W comfortably handles laptops, induction cooktops, or coffee makers (check appliance draw).
- Battery chemistry: LFP lasts longer and tolerates heavy cycling; NMC is lighter for the capacity but usually fewer cycles.
- Fridge users: Prefer models with regulated 12 V for consistent compressor performance.
- Solar pairing: If you’ll recharge off-grid, check for MPPT and ≥ 200–500 W solar input support.
Verdict & Recommendations
- Best Overall — EcoFlow DELTA 2
Fastest AC charging, long-life LFP, and solid inverter make it the most versatile mid-size pick. - Best Lightweight Mid-Size — EcoFlow DELTA mini
Easier carry, still plenty of output for camp basics. - Best Sub-1 kWh LFP — BLUETTI AC70
Quick charging, 1,000 W output, and manageable 22.5 lb weight. - Best Longevity + Warranty — Anker 555 PowerHouse
LFP plus strong brand warranty for long-term value. - Best Ecosystem/12 V — Goal Zero Yeti 1000 Core
Plays nicely with 12 V fridges and Goal Zero accessories.
FAQ
Will these run a CPAP all night?
Yes. Around 700–1,200 Wh typically yields ~24–40 hours depending on settings. Turning off the humidifier extends runtime.
Can I use a portable induction cooktop?
Check the cooktop’s wattage. A 1,600 W inverter (e.g., DELTA 2) is a safer bet for short boils; smaller inverters may trip.
Is LiFePO₄ worth it?
If you camp frequently or want a unit that lasts many years, yes. LFP typically offers thousands of cycles and better thermal stability.
How much solar should I bring?
Aim for 200–400 W portable panels for mid-size units if you plan to recharge meaningfully during the day.
Sources & References
Manufacturer specifications (North America): EcoFlow, BLUETTI, Jackery, Anker (SOLIX), Goal Zero.
Independent reviews and measurements: reputable editorial test outlets and large-sample verified buyer feedback from authorized retailers.
