Ratings worksheet — factor vectors for every published rating
Derived 2026-07-25 against the factor anchors published on /how-we-research.
Weights: stations — longevity 25% / output 20% / solar 15% / recharge 15% / value 25%.
Panels — yield 35% / build 25% / compatibility 15% / value 25%. Both sum to 100%.
Factor scores are 1–5 with the ±0.3 adjustments the anchors define; the weighted sum,
rounded half-up to one decimal, is the published rating: in the review frontmatter.
Any rating that cannot be rebuilt from this file is wrong — fix the file or the rating.
Output headroom takes the higher of an absolute-watts table and a proportionate (continuous W ÷ rated Wh) table, then applies the surge modifier, capped at 5.0.
Panel value bands (derived from the tracked catalogue, dated checks 2026-06-27 to 2026-07-23): median 0.58 W/$, best 0.81, worst 0.40 → 5: ≥0.75 · 4: 0.64–0.74 · 3: 0.54–0.63 · 2: 0.45–0.53 · 1: under 0.45.
Summary
| Slug | Type | Longevity/Yield | Output/Build | Solar/Compat | Recharge | Value | Rating |
|---|---|---|---|---|---|---|---|
| anker-solix-c1000-gen2 | station | 4.5 | 5 | 4 | 5 | 5 | 4.7 |
| anker-solix-c1000-solar-generator | station | 4.5 | 5 | 4 | 5 | 4.3 | 4.6 |
| anker-solix-f2600 | station | 4 | 4 | 2 | 4 | 4 | 3.7 |
| anker-solix-f3000 | station | 4.5 | 5 | 4 | 3 | 5 | 4.4 |
| bluetti-ac180-solar-generator | station | 4.5 | 4 | 3 | 4 | 4.3 | 4.1 |
| bluetti-ac200l | station | 5 | 4 | 3 | 4 | 5 | 4.4 |
| bluetti-ac60p | station | 4 | 3.3 | 2 | 4 | 3 | 3.3 |
| bluetti-apex-300 | station | 5 | 5 | 5 | 4 | 5 | 4.9 |
| ecoflow-delta-2 | station | 4 | 4 | 3 | 4 | 5 | 4.1 |
| ecoflow-delta-3 | station | 4.5 | 4.3 | 3 | 5 | 5 | 4.4 |
| ecoflow-delta-2-max | station | 4 | 3.7 | 3 | 4 | 4 | 3.8 |
| ecoflow-delta-2-solar-generator | station | 4 | 4 | 3 | 4 | 4.3 | 3.9 |
| ecoflow-delta-pro-3 | station | 4.5 | 5 | 4 | 4 | 4.3 | 4.4 |
| ecoflow-river-2-pro-solar-generator | station | 4 | 3.3 | 2 | 4 | 3.3 | 3.4 |
| goal-zero-yeti-1500x | station | 1 | 4 | 2 | 1 | 1 | 1.8 |
| goal-zero-yeti-500x | station | 1 | 1.3 | 3 | 2 | 1 | 1.5 |
| jackery-explorer-1000-v2 | station | 4.5 | 4.3 | 2 | 4 | 5 | 4.1 |
| jackery-explorer-2000-plus | station | 4.5 | 5 | 4 | 3 | 5 | 4.4 |
| jackery-solar-generator-1000-v2 | station | 4.5 | 4.3 | 2 | 4 | 5 | 4.1 |
| jackery-solar-generator-2000-v2 | station | 4.5 | 4.3 | 1 | 3 | 4.3 | 3.7 |
| bluetti-pv200 | panel | 3 | 3 | 4 | — | 2 | 2.9 |
| anker-solix-ps200 | panel | 3 | 4 | 4 | — | 4 | 3.7 |
| anker-solix-ps200-bifacial | panel | 5 | 5 | 4 | — | 2 | 4.1 |
| jackery-solarsaga-100w-air | panel | 5 | 3 | 3 | — | 1 | 3.2 |
| jackery-solarsaga-200w | panel | 4 | 5 | 3 | — | 2 | 3.6 |
| renogy-400w-solar-suitcase | panel | 4 | 3 | 4 | — | 5 | 4.0 |
| goal-zero-yeti-1500 | station | 4.5 | 4 | 4 | 4 | 4.3 | 4.2 |
goal-zero-yeti-1500 — value resolved 2026-10-11
Longevity 4.5 — 4,000 rated cycles (body), 3,500–4,999 band. Output 4 — absolute 2,000W → 4; proportionate 2,000W/1,505Wh = 1.33 W/Wh → 3; take the higher (4); 3,600W surge (1.8x, between 1.5x and 2.0x, no adjustment). Solar 4 — 900W / 1,505Wh = 0.60 W/Wh (body). Recharge 4 — 1.1h (66 min, body). Value 4.3 — (1,505Wh x 4,000 cycles)/1000/$1,499.95 = 4.01 kWh per dollar (in stock at Amazon, checked 2026-10-11; the street price equals Goal Zero's list) → 4. +0.3 ecosystem expansion path (Yeti Tank expansion and Home Integration Kit, stated in body as the reason for the premium). Weighted: 4.5x25% + 4x20% + 4x15% + 4x15% + 4.3x25% = 4.2. Published rating corrected 3.9 → 4.2 with a dated note in the review; the 3.9 predated the anchors.
Per-product derivations
anker-solix-c1000-gen2
- Longevity 4.5 — 4,000 rated cycles.
- Output 5 — absolute 2,000W → 4; proportionate 2,000W/1,024Wh = 1.95 W/Wh → 5; take the higher (5); 3000W surge (1.50x).
- Solar 4 — 600W max / 1,024Wh = 0.59 W/Wh.
- Recharge 5 — 49 min AC on the in-box supply.
- Value 5 — (1,024Wh x 4,000 cycles)/1000/$669.00 = 6.12 kWh per dollar (in stock, checked 2026-10-11).
- Notes: All specs stated in review body (4,000 cycles; 2000W/3000W; 600W solar; 49-min recharge).
anker-solix-c1000-solar-generator
- Longevity 4.5 — 4,000 rated cycles (C1000 Gen 2 station).
- Output 5 — absolute 2,000W → 4; proportionate 2,000W/1,024Wh = 1.95 W/Wh → 5; take the higher (5); 3000W surge (1.50x).
- Solar 4 — 600W max / 1,024Wh = 0.59 W/Wh.
- Recharge 5 — 49 min AC on the in-box supply.
- Value 4.3 — (1,024Wh x 4,000 cycles)/1000/$849.99 = 4.82 kWh per dollar (in stock, checked 2026-10-11) → 4; +0.3 bundled 200W bifacial panel.
- Weighted: 4.5x25% + 5x20% + 4x15% + 5x15% + 4.3x25% = 4.55 → 4.6.
- Notes: Re-derived 2026-10-11 for the Gen 2 bundle (B0GWGSKN54), which the review has covered since 2026-08-09; the previous entry described the Gen 1 bundle (1,056Wh, 3,000 cycles) and no longer matched the review. Specs as for anker-solix-c1000-gen2 (4,000 cycles; 2000W/3000W; 600W solar; 49-min recharge). Published rating corrected 4.5 → 4.6 with a dated note in the review.
anker-solix-f2600
- Longevity 4 — 3,000 rated cycles.
- Output 4 — absolute 2,400W → 4; proportionate 2,400W/2,560Wh = 0.94 W/Wh → 2; take the higher (4); 3600W surge (1.50x).
- Solar 2 — 1,000W max / 2,560Wh = 0.39 W/Wh.
- Recharge 4 — 75 min AC on the in-box supply.
- Value 4 — (2,560Wh x 3,000 cycles)/1000/$1,399.00 = 5.49 kWh per dollar (unavailable; last dated check 2026-06-12).
- Notes: All specs stated in review body (3,000 cycles; 2,400W; 1,000W solar; ~75-min recharge).
anker-solix-f3000
- Corrected 2026-10-25 against Anker US specifications and Anker US datasheet. Earlier catalog metadata understated output, solar, cycle life, and weight.
- Longevity 4.5 — 4,000 rated cycles.
- Output 5 — 3,600W absolute output is in the top band; 7,200W AC surge is 2x continuous. A single unit supplies 120V; 240V requires two units and the optional Double Voltage Hub.
- Solar 4 — 2,400W / 3,072Wh = 0.78125 W/Wh, across separate 1,600W and 800W inputs.
- Recharge 3 — calculated in-box floor: 3,072Wh / 1,800W × 60 = 102.4 min. This is not a measured full-charge time; actual full charge takes longer.
- Value 5 — (3,072Wh × 4,000 cycles) / 1000 / $1,398.98 = 8.78 kWh per dollar, using the unchanged tracked offer checked 2026-10-12. The score is capped at 5; no price check was refreshed during this specification correction.
- Weighted sum: 4.5×0.25 + 5×0.20 + 4×0.15 + 3×0.15 + 5×0.25 = 4.425 → 4.4. Previous rating: 4.0.
- Weight corrected to 91.5 lb. Capacity and runtime calculations are unchanged.
bluetti-ac180-solar-generator
- Longevity 4.5 — 3,500 rated cycles.
- Output 4 — absolute 1,800W → 4; proportionate 1,800W/1,152Wh = 1.56 W/Wh → 4; take the higher (4); surge not published; no adjustment.
- Solar 3 — 500W max / 1,152Wh = 0.43 W/Wh.
- Recharge 4 — 78 min AC on the in-box supply.
- Value 4.3 — (1,152Wh x 3,500 cycles)/1000/$999.00 = 4.04 kWh per dollar (in stock, checked 2026-10-11). +0.3 bundled 200W panel.
- Notes: Body states 1,152Wh / 1,800W / 200W panel. Cycles (3,500), solar max (500W), and ~1.3h turbo AC recharge (in-box capability, app toggle) from Bluetti's AC180 product page — not yet stated in the review body. Bluetti's 2,700W figure is Power Lifting (resistive loads), not motor surge, so no surge adjustment is applied.
bluetti-ac200l
Slug kept from the AC200L; the review has covered its successor, the Bluetti Elite 200 V2, since 2026-09-21.
- Longevity 5 — 6,000+ rated cycles.
- Output 4 — absolute 2,600W → 4; proportionate 2,600W/2,073.6Wh = 1.25 W/Wh → 3; take the higher (4). No surge figure published (the 3,900W figure is a lifting mode for resistive loads, not surge), so no surge modifier.
- Solar 3 — 1,000W max / 2,073.6Wh = 0.48 W/Wh.
- Recharge 4 — about 84 min (1.4 hours) AC on the included cable, 1,800W input.
- Value 5 — (2,073.6Wh x 6,000 cycles)/1000/$899.00 = 13.84 kWh per dollar (in stock, checked 2026-10-11). Not expandable, so no ecosystem adjustment.
- Weighted: 5x25% + 4x20% + 3x15% + 4x15% + 5x25% = 4.35 → 4.4.
- Notes: Re-derived 2026-10-11; the previous entry still described the AC200L (2,048Wh, 3,500 cycles, 1,200W solar). Published rating corrected 4.3 → 4.4 with a dated note in the review.
bluetti-ac60p
- Longevity 4 — 3,000 rated cycles.
- Output 3.3 — absolute 600W → 2; proportionate 600W/504Wh = 1.19 W/Wh → 3; take the higher (3); 1200W surge (2.00x).
- Solar 2 — 200W max / 504Wh = 0.40 W/Wh.
- Recharge 4 — 60 min AC on the in-box supply.
- Value 3 — (504Wh x 3,000 cycles)/1000/$399.00 = 3.79 kWh per dollar (unavailable; last dated check 2026-06-12).
- Notes: All specs stated in review body (3,000 cycles; 600W with 1,200W Power Lifting; 200W solar; ~60-min recharge). The 1,200W figure is Power Lifting for resistive loads; scored as surge per DB spec table, +0.3.
bluetti-apex-300
- Longevity 5 — 6,000 rated cycles.
- Output 5 — absolute 3,840W → 5 (or 120/240V dual voltage); proportionate 3,840W/2,764Wh = 1.39 W/Wh → 3; take the higher (5); 7680W surge (2.00x).
- Solar 5 — 2,400W max / 2,764Wh = 0.87 W/Wh.
- Recharge 4 — 90 min AC on the in-box supply.
- Value 5 — (2,764Wh x 6,000 cycles)/1000/$1,699.00 = 9.76 kWh per dollar (in stock, checked 2026-10-11).
- Notes: All specs stated in review body (6,000 cycles; 3,840W/7,680W; 120/240V dual voltage; 2,400W solar; 90-min recharge).
ecoflow-delta-2
- Longevity 4 — 3,000 rated cycles.
- Output 4 — absolute 1,800W → 4; proportionate 1,800W/1,024Wh = 1.76 W/Wh → 4; take the higher (4); 2700W surge (1.50x).
- Solar 3 — 500W max / 1,024Wh = 0.49 W/Wh.
- Recharge 4 — 80 min AC on the in-box supply.
- Value 5 — (1,024Wh x 3,000 cycles)/1000/$469.00 = 6.55 kWh per dollar (in stock, checked 2026-07-23). +0.3 best-in-class app (verdict) and expandable-battery path (body).
- Notes: Body states 3,000 cycles; 80-min recharge; 1800W output. Surge (2,700W) and 500W solar max from the on-page spec table (DB meta).
ecoflow-delta-2-max
- Longevity 4 — 3,000 rated cycles.
- Output 3.7 — absolute 2,400W → 4; proportionate 2,400W/2,048Wh = 1.17 W/Wh → 3; take the higher (4); 3100W surge (1.29x).
- Solar 3 — 1,000W max / 2,048Wh = 0.49 W/Wh.
- Recharge 4 — 81 min AC on the in-box supply.
- Value 4 — (2,048Wh x 3,000 cycles)/1000/$1,029.00 = 5.97 kWh per dollar (in stock, checked 2026-10-11).
- Rescored 2026-10-11 at the current street price (weekly re-scoring): value 5 → 4, rating 4.0 → 3.8.
- Notes: All specs stated in review body (3,000 cycles; 81-min recharge; 1,000W solar; 2,400W output). Surge 3,100W from on-page spec table; 3,100/2,400 = 1.29x, below the 1.5x floor, so -0.3.
ecoflow-delta-2-solar-generator
- Longevity 4 — 3,000 rated cycles.
- Output 4 — absolute 1,800W → 4; proportionate 1,800W/1,024Wh = 1.76 W/Wh → 4; take the higher (4); 2700W surge (1.50x).
- Solar 3 — 500W max / 1,024Wh = 0.49 W/Wh.
- Recharge 4 — 80 min AC on the in-box supply.
- Value 4.3 — (1,024Wh x 3,000 cycles)/1000/$684.00 = 4.49 kWh per dollar (in stock, checked 2026-06-29). +0.3 bundled 220W bifacial panel.
- Notes: Body states 1,024Wh; 1,800W/2,700W; 500W solar ceiling; 3,000-cycle battery. 80-min AC recharge from the same Delta 2 platform (stated in our Delta 2 review).
ecoflow-delta-pro-3
- Longevity 4.5 — 4,000 rated cycles.
- Output 5 — absolute 4,000W → 5 (or 120/240V dual voltage); proportionate 4,000W/4,096Wh = 0.98 W/Wh → 2; take the higher (5); 8000W surge (2.00x).
- Solar 4 — 2,600W max / 4,096Wh = 0.63 W/Wh.
- Recharge 4 — 60 min AC on the in-box supply.
- Value 4.3 — (4,096Wh x 4,000 cycles)/1000/$2,799.00 = 5.85 kWh per dollar (in stock, checked 2026-10-11) → 4. +0.3 ecosystem expansion (48kWh, stated in body).
- Rescored 2026-10-11 at the current street price (weekly re-scoring): value 5 → 4.3, rating 4.6 → 4.4.
- Notes: All specs stated in review body (4,000 cycles; 4,000W/8,000W; 120/240V; 2,600W solar; ~60-min recharge).
ecoflow-river-2-pro-solar-generator
- Longevity 4 — 3,000 rated cycles.
- Output 3.3 — absolute 800W → 2; proportionate 800W/768Wh = 1.04 W/Wh → 3; take the higher (3); 1600W surge (2.00x).
- Solar 2 — 220W max / 768Wh = 0.29 W/Wh.
- Recharge 4 — 70 min AC on the in-box supply.
- Value 3.3 — (768Wh x 3,000 cycles)/1000/$599.00 = 3.85 kWh per dollar (in stock, checked 2026-10-11) → 3. +0.3 bundled 220W panel.
- Rescored 2026-10-11 at the current street price (weekly re-scoring): value 4.3 → 3.3, rating 3.6 → 3.4.
- Notes: Body states 768Wh; 800W/1,600W; 220W panel. Cycles (3,000), solar max (220W), and 70-min AC recharge from EcoFlow's River 2 Pro product page — not yet stated in the review body.
goal-zero-yeti-1500x
- Longevity 1 — 500 rated cycles.
- Output 4 — absolute 2,000W → 4; proportionate 2,000W/1,516Wh = 1.32 W/Wh → 3; take the higher (4); 3500W surge (1.75x).
- Solar 2 — 600W max / 1,516Wh = 0.40 W/Wh.
- Recharge 1 — 840 min AC on the in-box supply.
- Value 1 — (1,516Wh x 500 cycles)/1000/$1,799.95 = 0.42 kWh per dollar (no current listing (ASIN dead); last dated check 2026-06-12).
- Notes: All specs stated in review body (500 cycles; 2,000W; 600W solar; 14-hour in-box recharge on the 120W supply — the 3-hour figure needs a 600W supply sold separately).
goal-zero-yeti-500x
- Longevity 1 — 500 rated cycles.
- Output 1.3 — absolute 300W → 1; proportionate 300W/505Wh = 0.59 W/Wh → 1; take the higher (1); 1200W surge (4.00x).
- Solar 3 — 240W max / 505Wh = 0.48 W/Wh.
- Recharge 2 — 180 min AC on the in-box supply.
- Value 1 — (505Wh x 500 cycles)/1000/$549.95 = 0.46 kWh per dollar (unavailable; last dated check 2026-06-12).
- Notes: All specs stated in review body (500 cycles; 300W/1,200W surge; 240W solar; 3-hour recharge).
jackery-explorer-1000-v2
- Longevity 4.5 — 4,000 rated cycles.
- Output 4.3 — absolute 1,500W → 3; proportionate 1,500W/1,070Wh = 1.40 W/Wh → 4; take the higher (4); 3000W surge (2.00x).
- Solar 2 — 400W max / 1,070Wh = 0.37 W/Wh.
- Recharge 4 — 60 min AC on the in-box supply.
- Value 5 — (1,070Wh x 4,000 cycles)/1000/$499.00 = 8.58 kWh per dollar (in stock, checked 2026-10-11). +0.3 retail-returns availability (Costco/Target, stated in body).
- Notes: All specs stated in review body (4,000 cycles; 1500W/3000W; 400W solar; 60-min recharge).
jackery-explorer-2000-plus
- Longevity 4.5 — 4,000 rated cycles.
- Output 5 — absolute 3,000W → 5; proportionate 3,000W/2,042Wh = 1.47 W/Wh → 4; take the higher (5); 6000W surge (2.00x).
- Solar 4 — 1,400W max / 2,042Wh = 0.69 W/Wh.
- Recharge 3 — 120 min AC on the in-box supply.
- Value 5 — (2,042Wh x 4,000 cycles)/1000/$899.00 = 9.09 kWh per dollar (in stock, checked 2026-06-29). +0.3 ecosystem expansion (24kWh) and retail support (both stated in body).
- Notes: All specs stated in review body (4,000 cycles; 3,000W/6,000W; 1,400W solar; 120-min recharge).
jackery-solar-generator-1000-v2
- Longevity 4.5 — 4,000 rated cycles.
- Output 4.3 — absolute 1,500W → 3; proportionate 1,500W/1,070Wh = 1.40 W/Wh → 4; take the higher (4); 3000W surge (2.00x).
- Solar 2 — 400W max / 1,070Wh = 0.37 W/Wh.
- Recharge 4 — 60 min AC on the in-box supply.
- Value 5 — (1,070Wh x 4,000 cycles)/1000/$699.00 = 6.12 kWh per dollar (in stock, checked 2026-10-11) → 5. +0.3 bundled 200W panel (retail availability also stated; one adjustment applied), capped at 5.
- Rescored 2026-10-11 at the current street price (weekly re-scoring): value 4.3 → 5, rating 4.0 → 4.1.
- Notes: Body states 4,000 cycles; 1,500W/3,000W; 400W solar ceiling. 60-min AC recharge from the same Explorer 1000 v2 platform (stated in our Explorer 1000 v2 review).
jackery-solar-generator-2000-v2
- Longevity 4.5 — 4,000 rated cycles.
- Output 4.3 — absolute 2,200W → 4; proportionate 2,200W/2,042Wh = 1.08 W/Wh → 3; take the higher (4); 4400W surge (2.00x).
- Solar 1 — 400W max / 2,042Wh = 0.20 W/Wh.
- Recharge 3 — 102 min AC on the in-box supply.
- Value 4.3 — (2,042Wh x 4,000 cycles)/1000/$1,399.00 = 5.84 kWh per dollar (in stock, checked 2026-10-11) → 4. +0.3 bundled 2x200W panels.
- Rescored 2026-10-11 at the current street price (weekly re-scoring): value 5 → 4.3, rating 3.8 → 3.7.
- Notes: Body states 2,042Wh; 2,200W; 400W solar intake; 4,000 cycles. Surge (4,400W) and ~1.7h (102-min) AC recharge from Jackery's Explorer 2000 v2 product page — not yet stated in the review body.
bluetti-pv200
- Yield 3 — Single-sided (body: 'no bifacial cells'), no published efficiency figure — efficiency-not-published band. Review should note fit: suits sub-1,000Wh stations per its own body.
- Build 3 — No IP rating published; body describes a standard foldable.
- Compatibility 4 — Standard MC4 (body), but body notes Jackery needs an adapter — standard connectors, adapter for some brands.
- Value 2 — 200W / $399.00 = 0.50 W per dollar (in stock, checked 2026-10-11).
- Rescored 2026-10-11 at the current street price (weekly re-scoring): value 3 → 2, rating 3.2 → 2.9.
anker-solix-ps200
- Yield 3 — Single-sided (body: 'no bifacial trick'), no published efficiency figure — efficiency-not-published band.
- Build 4 — IP67 with integrated adjustable kickstand (both stated in body).
- Compatibility 4 — Pairs natively with Anker, 'works with others through standard connectors' (body) — adapter for some brands.
- Value 4 — 200W / $299.99 = 0.67 W per dollar (unavailable; last dated check 2026-06-27).
anker-solix-ps200-bifacial
- Yield 5 — Bifacial (body) and 25% N-type cells per Anker's product page — 23%+ threshold met.
- Build 5 — IP68 per Anker's product page (not yet stated in the review body).
- Compatibility 4 — XT-60 output with MC4-to-XT-60 adapter support per Anker's product page — standard connectors, adapter for some brands.
- Value 2 — 200W / $399.99 = 0.50 W per dollar (in stock, checked 2026-10-11).
- Rescored 2026-10-11 at the current street price (weekly re-scoring): value 1 → 2, rating 3.9 → 4.1.
jackery-solarsaga-100w-air
- Yield 5 — Bifacial and 23% efficiency, both stated in body — wattage no longer scored; review should state fit (100W suits sub-500Wh stations and daytime top-ups).
- Build 3 — Sources conflict: the Amazon listing we track says IP65, Jackery pages say IP68. Scored on the verified lower figure (IP65) without a confirmed adjustable stand. If IP68 is confirmed, this becomes a 5.
- Compatibility 3 — DC8020 output, Jackery-native; third-party adapters required for other brands (Jackery product page).
- Value 1 — 100W / $249.00 = 0.40 W per dollar (in stock, checked 2026-10-11).
jackery-solarsaga-200w
- Yield 4 — Bifacial (body); no published efficiency figure, so the 23%+ AND-condition for a 5 isn't confirmed — bifacial-alone band.
- Build 5 — IP68 (stated in body).
- Compatibility 3 — Natively matched to Jackery, 'works with others via standard adapters' (body).
- Value 2 — 200W / $379.00 = 0.53 W per dollar (in stock, checked 2026-10-11).
- Rescored 2026-10-11 at the current street price (weekly re-scoring): value 3 → 2, rating 3.9 → 3.6.
renogy-400w-solar-suitcase
- Yield 4 — Single-sided, 23% efficiency (body) — single-sided-with-23%+-efficiency band. Review should state fit (400W suits 2kWh+ stations, per its own body).
- Build 3 — Suitcase with stand (body); no IP rating published.
- Compatibility 4 — 'Works across stations via standard connectors' (body) — adapter for some brands.
- Value 5 — 400W / $495.99 = 0.81 W per dollar (in stock, checked 2026-10-11).
ecoflow-delta-3
- Longevity 4.5 — 4,000 rated cycles.
- Output 4.3 — absolute 1,800W → 4; proportionate 1,800W/1,024Wh = 1.76 W/Wh → 4; take the higher (4); 3600W surge (2.00x) → +0.3.
- Solar 3 — 500W max / 1,024Wh = 0.49 W/Wh.
- Recharge 5 — 56 min AC (1,500W in-box input; floor 1,024/1,500 ≈ 41 min); under 60 min.
- Value 5 — (1,024Wh x 4,000 cycles)/1000/$599.00 = 6.84 kWh per dollar (in stock, checked 2026-10-11).
- Weighted: 4.5x25% + 4.3x20% + 3x15% + 5x15% + 5x25% = 4.435 → 4.4.
- Notes: All specs confirmed 2026-10-11 on EcoFlow's US DELTA 3 product page (1,024Wh; 4,000 cycles to 80%; 1,800W/3,600W; 1,500W AC in, 0–100% in 56 min; 500W 11–60V solar; under 10ms; 27.6 lb; expandable to 5kWh). Amazon B0DCBYMC9D title "EF ECOFLOW Delta 3 … 1024Wh 1800W … Full Charge in 56 Min" (plain Delta 3, not Plus/Classic; the Classic is a separate EFDELTA3C listing).
Weights and score bands are published on how we research.