Solar Panel Comparison

Comparing Amazon alternatives against the Greentech Renewables QCells quote. Target: ~1,600–1,800W array for EG4 6000XP inverter. Roof mount, 30deg pitch. Zip 05763.Prices as of March 7, 2026. Amazon prices include free shipping where noted.

Total Cost Summary (Panels + Mounting + BOS)

Configuration	Total Watts	Panel Cost	Mount Cost	BOS	Grand Total	$/Watt
Baseline4x 430W	1720W	$1686.69	included	$75	$1761.67	`$1.02`
Option A16x 100W	1600W	$744.00	$72.00	$73	$886.98	`$0.55`
Option B8x 195W	1560W	$1079.88	$36.00	$75	$1190.86	`$0.76`

Baseline includes IronRidge AIRE professional racking in the $1,686.69 Greentech quote (panels + racking bundled). Options A and B use Z-bracket roof mounting (flush to 30deg pitch). BOS includes string fuse, cable clips, and roof junction box (~$73–75 for all options). Does not include home-run cabling (see Cabling page).

Panel Layout (True Scale)

All three configurations shown at the same scale. 1-inch gap between panels.

Panel Specifications

Spec	Baseline	Option A	Option B
Panel	QCells Q.TRON BLK M-G2+ 430W	ECO-WORTHY 100W Mono (Silver)	ECO-WORTHY 195W N-Type Bifacial
Wattage	430W	100W	195W
Qty needed	4 panels	16 panels	8 panels
Total array	1720W	1600W	1560W
Cell type	Mono PERC, Q.ANTUM NEO	Mono PERC	N-Type TOPCon, 18BB, Bifacial
Efficiency	21.4%	21–23%	25%
Bifacial	No	No	Yes
Vmp	32.94V	18V	20V
Imp	13.06A	6A	9.85A
Voc	39.32V	22V	24V
Isc	13.93A	6A	10.5A
Dimensions	69.7 x 45.5 x 1.2 in	38.6 x 21.1 x 1.4 in	58.9 x 26.2 x 1.4 in
Area (each)	22 ft²	5.7 ft²	10.7 ft²
Total array area	88.1 ft²	90.5 ft²	85.7 ft²
Weight (each)	46.3 lbs	13.4 lbs	21 lbs
Total weight	185 lbs	214 lbs	168 lbs
Warranty	25yr product / 25yr performance	5yr workmanship / 25yr performance	5yr workmanship / 25yr performance
UL Listed	Yes	No	No
Shipping	Local pickup / Greentech delivery	FREE delivery	FREE delivery

String Configuration (EG4 6000XP)

Inverter MPPT input range: 100–480V DC. 2 independent MPPT inputs. Cold Voc calculated for Vermont winter (-30C), using temperature coefficient -0.3%/C.

Config	String Layout	Vmp (string)	Voc (string)	Voc Cold	Viable?
Baseline	`4S1P on 1 MPPT`	131.76V	157.28V	183.24V	YES
Option A	`16S1P on 1 MPPT`	288V	352V	410.08V	YES
Option B	`8S1P on 1 MPPT`	160V	192V	223.68V	YES

Baseline Well within 100–480V window. Leaves 2nd MPPT open for future expansion.Option A Fits window. High voltage string. Could split 8S+8S on 2 MPPTs (Vmp=144V, Voc=176V).Option B Fits window well. Cannot split 4S+4S (Vmp=80V < 100V min).

Inter-Panel BOS Costs

Balance-of-system costs for rooftop wiring between panels and into the building. All panels come with pre-attached MC4 leads long enough for panel-to-panel series connections — no extension cables needed. Single-string configs don't strictly require overcurrent protection per NEC 690.9(A), but a fuse is included as best practice.

Item	Baseline	Option A	Option B
MC4 extensions	$0 (3 connections — pre-attached ~39" MC4 leads reach between panels)	$0 (15 connections — pre-attached 35" MC4 leads reach between panels)	$0 (7 connections — pre-attached ~35" MC4 leads reach between panels)
Inline fuse + holder	$14.99	$12.99	$14.99
Cable clips	$7.99	$7.99	$7.99
Roof junction box	$52.00	$52.00	$52.00
BOS Total	$74.98	$72.98	$74.98

All prices from Amazon with free shipping to 05763. Priced March 2026. BOS costs are essentially identical across options (~$73–75) — the cost difference between configurations is driven entirely by panel and racking costs, not inter-panel wiring.

Analysis

Baseline: QCells + IronRidge ($1,686.69)

The Greentech quote bundles 4x QCells 430W panels with IronRidge AIRE A2 professional racking. This is the premium option: UL-listed panels AND racking, engineered wind/snow load ratings, 20-year racking warranty, fire-rated assembly, and zero permitting friction. The QCells panels are a tier-1 manufacturer with bankable warranties. At $0.98/W all-in, this is competitive for a turnkey panels+racking package.

Option A: ECO-WORTHY 100W x16 ($814)

The cheapest option at $0.51/W with Z-brackets. But 16 small panels means 16 sets of MC4 connections, extensive wiring, and ~91 sq ft of roof coverage. Z-brackets flush-mount to the roof, so panels inherit the 30deg pitch — good for Vermont. The sheer number of panels increases points of failure and maintenance burden. Also requires significantly more roof penetrations (64 Z-bracket attachment points vs 12–16 for larger panels).

Option B: ECO-WORTHY 195W Bifacial x8 ($1,116)

The sweet spot. N-Type TOPCon cells at 25% efficiency with bifacial design. Half the panel count of Option A (8 vs 16), so less wiring, fewer connection points, and fewer roof penetrations. Z-brackets flush to the 30deg roof pitch for just $36. At $0.72/W all-in, this undercuts the Greentech quote by $571 while offering newer cell technology (N-Type vs PERC). The tradeoff: no UL listing on panels or racking, 5yr vs 25yr product warranty, and ECO-WORTHY is a budget brand vs QCells tier-1.

Mounting Options

System	Price	Pros	Cons
Z-Brackets (SUNMAK 16-pack)	`$17.99/pack (4 panels)`	Cheapest, simplest, lightweight aluminum. Flush to roof = panels inherit 30deg pitch.	Not UL listed. No engineered wind/snow ratings.
Unistrut P1000 Roof Rails	`$200–430 (4 panels, rails+clamps+hardware)`	Flexible, available at Home Depot/Amazon, strong channel system	NOT UL 2703 listed. Corrosion risk (pre-galv rusts outdoors). No engineering letter. More complex install.
IronRidge AIRE A2 (current quote)	`Included in $1,686.69 Greentech quote`	UL 2703 listed, 20yr warranty, free engineering tools, fire-rated, engineered for snow/wind	Most expensive. Only through distributors.

Verdict

Criteria	Winner	Notes
Lowest cost	Option A	16x100W + Z-brackets + BOS = $887 ($0.55/W)
Best value	Option B	8x195W bifacial + Z-brackets + BOS = $1,191 ($0.76/W)
Best quality	Baseline	Tier-1 panels, UL-listed racking + BOS = $1,762 ($1.02/W)
Easiest install	Baseline	IronRidge is purpose-built; everything clicks together
Fewest panels	Baseline	4 panels vs 8 (B) vs 16 (A)
Best cell tech	Option B	N-Type TOPCon 25% eff + bifacial vs PERC 21%
Permitting	Baseline	Only option with UL 2703-listed racking
Expandability	Tie	All configs leave 2nd MPPT open for future panels

Bottom line: Including BOS costs (~$75 for all options), the Greentech QCells package comes to $1,762 ($1.02/W). You're paying ~$571 more than Option B for UL-listed panels and racking, engineered wind/snow ratings, 20-year racking warranty, and tier-1 panel warranties.If budget is the primary driver, Option B (ECO-WORTHY 195W bifacial x8) is the best Amazon alternative at $0.76/W all-in — newer N-Type cell technology, half the panel count of Option A, and $571 cheaper than Baseline. Z-brackets flush-mount to the 30deg roof pitch, which is near-optimal tilt for Vermont latitude.

Sources