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400+ Watt Solar Panels

In stock
Pallet
= 36
Regitec 415W Solar Panel 108 Cell RMH54/415B1 Wholesale 36 panels per pallet

Regitec 415W Solar Panel 108 Cell RMH54/415B1 Wholesale 36 panels per pallet

  • Rated Power Output 415 W
  • Voltage (VOC)37.45 V
  • Number of cells108
  • Cell TypeMonocrystalline
Limited stock
LONGi 405W Solar Panel 108 Cell All-Black LR5-54HPB-405M

LONGi 405W Solar Panel 108 Cell All-Black LR5-54HPB-405M

  • Rated Power Output 405 W
  • Voltage (VOC)37.15 V
  • Number of cells108
  • Cell TypeMonocrystalline
In stock
Seraphim 440W Solar Panel 108 Cell All-Black Bifacial SRP-440-BTD-BG Clearance

Seraphim 440W Solar Panel 108 Cell All-Black Bifacial SRP-440-BTD-BG Clearance

  • Rated Power Output 440 W
  • Voltage (VOC)39.3 V
  • Number of cells108
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

Limited stock
Customer Choice
Seraphim 410W Solar Panel 108 Cell Bifacial SRP-410-BMD-HV Clearance

Seraphim 410W Solar Panel 108 Cell Bifacial SRP-410-BMD-HV Clearance

  • Rated Power Output 410 W
  • Voltage (VOC)37.32 V
  • Number of cells108
  • Cell TypeMonocrystalline
Limited stock
Trina 410W Solar Panel 144 Cell Bifacial TSM-410-NE09RC.05 Clearance

Trina 410W Solar Panel 144 Cell Bifacial TSM-410-NE09RC.05 Clearance

  • Rated Power Output 410 W
  • Voltage (VOC)51 V
  • Number of cells144
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

In stock
Customer Choice
Peimar 450W Solar Panel 120 Cell All-Black DR10H450M Clearance

Peimar 450W Solar Panel 120 Cell All-Black DR10H450M Clearance

  • Rated Power Output 450 W
  • Voltage (VOC)41.18 V
  • Number of cells120
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Orlando, FL

In stock
Trina 415W Solar Panel 144 Cell All-Black Bifacial TSM-415NE09RC.05 Clearance

Trina 415W Solar Panel 144 Cell All-Black Bifacial TSM-415NE09RC.05 Clearance

  • Rated Power Output 415 W
  • Voltage (VOC)50.5 V
  • Number of cells144
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

Limited stock
Hyundai 405W Solar Panel 132 Half-Cell Bifacial HiS-S405YH(BK) Clearance

Hyundai 405W Solar Panel 132 Half-Cell Bifacial HiS-S405YH(BK) Clearance

  • Rated Power Output 405 W
  • Voltage (VOC)45.6 V
  • Number of cells132
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

Limited stock
JA Solar 410W Solar Panel 144 Cell JAM72S10-410/MR Liquidation

JA Solar 410W Solar Panel 144 Cell JAM72S10-410/MR Liquidation

  • Rated Power Output 410 W
  • Voltage (VOC)50.12 V
  • Number of cells144
  • Cell TypeMonocrystalline
In stock
JA Solar 405W Solar Panel 108 Cells JAM54S31-405/MR Clearance

JA Solar 405W Solar Panel 108 Cells JAM54S31-405/MR Clearance

  • Rated Power Output 405 W
  • Voltage (VOC)37.23 V
  • Number of cells108
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

In stock
Phono Solar 440W Solar Panel 108 Cell Bifacial PS440M8GFH-18/VNHB Clearance

Phono Solar 440W Solar Panel 108 Cell Bifacial PS440M8GFH-18/VNHB Clearance

  • Rated Power Output 440 W
  • Voltage (VOC)39.61 V
  • Number of cells108
  • Cell TypeMonocrystalline
Limited stock
Hyundai 435W Solar Panel 108 Half-Cell HiN-T435NF(BK)

Hyundai 435W Solar Panel 108 Half-Cell HiN-T435NF(BK)

  • Rated Power Output 435 W
  • Voltage (VOC)38.6 V
  • Number of cells108
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

In stock
Axitec 440W Solar Panel 108 Cell All-Black Bifacial AC-440TGB/108BB Clearance

Axitec 440W Solar Panel 108 Cell All-Black Bifacial AC-440TGB/108BB Clearance

  • Rated Power Output 440 W
  • Voltage (VOC)39.83 V
  • Number of cells108
  • Cell TypeMonocrystalline
In stock
Aptos Solar 460W Solar Panel 120 Cell Bifacial DNA-120-BF10-460W Clearance

Aptos Solar 460W Solar Panel 120 Cell Bifacial DNA-120-BF10-460W Clearance

  • Rated Power Output 460 W
  • Voltage (VOC)41.18 V
  • Number of cells120
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

Limited stock
JA Solar 450W Solar Panel 108 Cell All-Black Bifacial JA-54D41-450LB Clearance

JA Solar 450W Solar Panel 108 Cell All-Black Bifacial JA-54D41-450LB Clearance

  • Rated Power Output 450 W
  • Voltage (VOC)39.3 V
  • Number of cells108
  • Cell TypeMonocrystalline
In stock
JA Solar 440W Solar Panel 156 Cell JAM78S10-440/MR Clearance

JA Solar 440W Solar Panel 156 Cell JAM78S10-440/MR Clearance

  • Rated Power Output 440 W
  • Voltage (VOC)53 V
  • Number of cells156
  • Cell TypeMonocrystalline
Limited stock
ZNShine Solar 435W Solar Panel 108 Cell All-Black Bifacial ZXM7-UHLDD108-435 Clearance

ZNShine Solar 435W Solar Panel 108 Cell All-Black Bifacial ZXM7-UHLDD108-435 Clearance

  • Rated Power Output 435 W
  • Voltage (VOC)38.6 V
  • Number of cells108
  • Cell TypeMonocrystalline
Limited stock
JA Solar 445W Solar Panel 156 Cell JAM78S10-445/MR Clearance

JA Solar 445W Solar Panel 156 Cell JAM78S10-445/MR Clearance

  • Rated Power Output 445 W
  • Voltage (VOC)53.31 V
  • Number of cells156
  • Cell TypeMonocrystalline
In stock
Hyundai 440W Solar Panel 108 Cell All-Black Bifacial HiN-T440NF(BK)

Hyundai 440W Solar Panel 108 Cell All-Black Bifacial HiN-T440NF(BK)

  • Rated Power Output 440 W
  • Voltage (VOC)38.8 V
  • Number of cells108
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

In stock
Sunpro Power 440W Solar Panel 108 Cell All-Black Bifacial SM SP-440/108/FS30/BF

Sunpro Power 440W Solar Panel 108 Cell All-Black Bifacial SM SP-440/108/FS30/BF

  • Rated Power Output 440 W
  • Voltage (VOC)38.53 V
  • Number of cells108
  • Cell TypeMonocrystalline
Limited stock
Canadian Solar 440W Solar Panel 96 Cell All-Black CS6.2-48TM-440

Canadian Solar 440W Solar Panel 96 Cell All-Black CS6.2-48TM-440

  • Rated Power Output 440 W
  • Voltage (VOC)35.4 V
  • Number of cells96
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

In stock
Customer Choice
JA Solar 440W Solar Panel 108 Cell All-Black Bifacial JAM54D41-440/MB

JA Solar 440W Solar Panel 108 Cell All-Black Bifacial JAM54D41-440/MB

  • Rated Power Output 440 W
  • Voltage (VOC)39.38 V
  • Number of cells108
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Orlando, FL

In stock
Sirius 410W Solar Panel 108 Cell All-Black ELNSM54M-HC-410 Assembled in the USA

Sirius 410W Solar Panel 108 Cell All-Black ELNSM54M-HC-410 Assembled in the USA

  • Rated Power Output 410 W
  • Voltage (VOC)37.32 V
  • Number of cells108
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

In stock
Customer Choice
Q CELLS 410W Solar Panel 132 Cell Q.PEAK DUO BLK ML-G10+ Assembled in USA Clearance

Q CELLS 410W Solar Panel 132 Cell Q.PEAK DUO BLK ML-G10+ Assembled in USA Clearance

  • Rated Power Output 410 W
  • Voltage (VOC)45.37 V
  • Number of cells132
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

Limited stock
Q CELLS 415W Solar Panel 132 Cell Q.PEAK DUO HQC-415-QPD-BKML-G10.C+-DCA Assembled in the USA

Q CELLS 415W Solar Panel 132 Cell Q.PEAK DUO HQC-415-QPD-BKML-G10.C+-DCA Assembled in the USA

  • Rated Power Output 415 W
  • Voltage (VOC)45.41 V
  • Number of cells132
  • Cell TypeMonocrystalline
In stock
Q CELLS 410W Solar Panel 132 Cell Q.PEAK DUO HQC-410-QPD-BKML-G10.C+-DCA Assembled in the USA

Q CELLS 410W Solar Panel 132 Cell Q.PEAK DUO HQC-410-QPD-BKML-G10.C+-DCA Assembled in the USA

  • Rated Power Output 410 W
  • Voltage (VOC)45.37 V
  • Number of cells132
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Pompano Beach, FL

In stock
Q CELLS 430W Solar Panel 108 Cell Q.TRON HQC-430-QTRON-BKM-G2.H+-DCA Assembled in the USA

Q CELLS 430W Solar Panel 108 Cell Q.TRON HQC-430-QTRON-BKM-G2.H+-DCA Assembled in the USA

  • Rated Power Output 430 W
  • Voltage (VOC)39.32 V
  • Number of cells108
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Pompano Beach, FL

In stock
REC 460W Solar Panel 88 Cell All-Black REC460AA PURE-RX

REC 460W Solar Panel 88 Cell All-Black REC460AA PURE-RX

  • Rated Power Output 460 W
  • Voltage (VOC)65.8 V
  • Number of cells88
  • Cell TypeMonocrystalline

ClearanceUP TO 50% OFF

In stock
Pallet
= 36
Regitec 415W Solar Panel 108 Cell RMH54/415B1 Wholesale 36 panels per pallet

Regitec 415W Solar Panel 108 Cell RMH54/415B1 Wholesale 36 panels per pallet

  • Rated Power Output 415 W
  • Voltage (VOC)37.45 V
  • Number of cells108
  • Cell TypeMonocrystalline
Limited stock
LONGi 405W Solar Panel 108 Cell All-Black LR5-54HPB-405M

LONGi 405W Solar Panel 108 Cell All-Black LR5-54HPB-405M

  • Rated Power Output 405 W
  • Voltage (VOC)37.15 V
  • Number of cells108
  • Cell TypeMonocrystalline
In stock
Seraphim 440W Solar Panel 108 Cell All-Black Bifacial SRP-440-BTD-BG Clearance

Seraphim 440W Solar Panel 108 Cell All-Black Bifacial SRP-440-BTD-BG Clearance

  • Rated Power Output 440 W
  • Voltage (VOC)39.3 V
  • Number of cells108
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

Limited stock
Customer Choice
Seraphim 410W Solar Panel 108 Cell Bifacial SRP-410-BMD-HV Clearance

Seraphim 410W Solar Panel 108 Cell Bifacial SRP-410-BMD-HV Clearance

  • Rated Power Output 410 W
  • Voltage (VOC)37.32 V
  • Number of cells108
  • Cell TypeMonocrystalline
Limited stock
Trina 410W Solar Panel 144 Cell Bifacial TSM-410-NE09RC.05 Clearance

Trina 410W Solar Panel 144 Cell Bifacial TSM-410-NE09RC.05 Clearance

  • Rated Power Output 410 W
  • Voltage (VOC)51 V
  • Number of cells144
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

In stock
Customer Choice
Peimar 450W Solar Panel 120 Cell All-Black DR10H450M Clearance

Peimar 450W Solar Panel 120 Cell All-Black DR10H450M Clearance

  • Rated Power Output 450 W
  • Voltage (VOC)41.18 V
  • Number of cells120
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Orlando, FL

In stock
Trina 415W Solar Panel 144 Cell All-Black Bifacial TSM-415NE09RC.05 Clearance

Trina 415W Solar Panel 144 Cell All-Black Bifacial TSM-415NE09RC.05 Clearance

  • Rated Power Output 415 W
  • Voltage (VOC)50.5 V
  • Number of cells144
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

Limited stock
Hyundai 405W Solar Panel 132 Half-Cell Bifacial HiS-S405YH(BK) Clearance

Hyundai 405W Solar Panel 132 Half-Cell Bifacial HiS-S405YH(BK) Clearance

  • Rated Power Output 405 W
  • Voltage (VOC)45.6 V
  • Number of cells132
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

Limited stock
JA Solar 410W Solar Panel 144 Cell JAM72S10-410/MR Liquidation

JA Solar 410W Solar Panel 144 Cell JAM72S10-410/MR Liquidation

  • Rated Power Output 410 W
  • Voltage (VOC)50.12 V
  • Number of cells144
  • Cell TypeMonocrystalline
In stock
JA Solar 405W Solar Panel 108 Cells JAM54S31-405/MR Clearance

JA Solar 405W Solar Panel 108 Cells JAM54S31-405/MR Clearance

  • Rated Power Output 405 W
  • Voltage (VOC)37.23 V
  • Number of cells108
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

In stock
Phono Solar 440W Solar Panel 108 Cell Bifacial PS440M8GFH-18/VNHB Clearance

Phono Solar 440W Solar Panel 108 Cell Bifacial PS440M8GFH-18/VNHB Clearance

  • Rated Power Output 440 W
  • Voltage (VOC)39.61 V
  • Number of cells108
  • Cell TypeMonocrystalline
Limited stock
Hyundai 435W Solar Panel 108 Half-Cell HiN-T435NF(BK)

Hyundai 435W Solar Panel 108 Half-Cell HiN-T435NF(BK)

  • Rated Power Output 435 W
  • Voltage (VOC)38.6 V
  • Number of cells108
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

In stock
Axitec 440W Solar Panel 108 Cell All-Black Bifacial AC-440TGB/108BB Clearance

Axitec 440W Solar Panel 108 Cell All-Black Bifacial AC-440TGB/108BB Clearance

  • Rated Power Output 440 W
  • Voltage (VOC)39.83 V
  • Number of cells108
  • Cell TypeMonocrystalline
In stock
Aptos Solar 460W Solar Panel 120 Cell Bifacial DNA-120-BF10-460W Clearance

Aptos Solar 460W Solar Panel 120 Cell Bifacial DNA-120-BF10-460W Clearance

  • Rated Power Output 460 W
  • Voltage (VOC)41.18 V
  • Number of cells120
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

Limited stock
JA Solar 450W Solar Panel 108 Cell All-Black Bifacial JA-54D41-450LB Clearance

JA Solar 450W Solar Panel 108 Cell All-Black Bifacial JA-54D41-450LB Clearance

  • Rated Power Output 450 W
  • Voltage (VOC)39.3 V
  • Number of cells108
  • Cell TypeMonocrystalline
In stock
JA Solar 440W Solar Panel 156 Cell JAM78S10-440/MR Clearance

JA Solar 440W Solar Panel 156 Cell JAM78S10-440/MR Clearance

  • Rated Power Output 440 W
  • Voltage (VOC)53 V
  • Number of cells156
  • Cell TypeMonocrystalline
Limited stock
ZNShine Solar 435W Solar Panel 108 Cell All-Black Bifacial ZXM7-UHLDD108-435 Clearance

ZNShine Solar 435W Solar Panel 108 Cell All-Black Bifacial ZXM7-UHLDD108-435 Clearance

  • Rated Power Output 435 W
  • Voltage (VOC)38.6 V
  • Number of cells108
  • Cell TypeMonocrystalline
Limited stock
JA Solar 445W Solar Panel 156 Cell JAM78S10-445/MR Clearance

JA Solar 445W Solar Panel 156 Cell JAM78S10-445/MR Clearance

  • Rated Power Output 445 W
  • Voltage (VOC)53.31 V
  • Number of cells156
  • Cell TypeMonocrystalline
In stock
Customer Choice
Q CELLS 410W Solar Panel 132 Cell Q.PEAK DUO BLK ML-G10+ Assembled in USA Clearance

Q CELLS 410W Solar Panel 132 Cell Q.PEAK DUO BLK ML-G10+ Assembled in USA Clearance

  • Rated Power Output 410 W
  • Voltage (VOC)45.37 V
  • Number of cells132
  • Cell TypeMonocrystalline

Pickup on Mon, Feb 23 from Punta Gorda, FL

By Pallets

In stock
Pallet
= 36
Regitec 415W Solar Panel 108 Cell RMH54/415B1 Wholesale 36 panels per pallet

Regitec 415W Solar Panel 108 Cell RMH54/415B1 Wholesale 36 panels per pallet

  • Rated Power Output 415 W
  • Voltage (VOC)37.45 V
  • Number of cells108
  • Cell TypeMonocrystalline
Limited stock
Pallet
= 31
HT-SAAE 450W Solar Panel 144 Cell Bifacial HT72-166M-450 Wholesale 31 panels per pallet

HT-SAAE 450W Solar Panel 144 Cell Bifacial HT72-166M-450 Wholesale 31 panels per pallet

  • Rated Power Output 450 W
  • Voltage (VOC)50 V
  • Number of cells144
  • Cell TypeMonocrystalline
Limited stock
Pallet
= 35
CW Energy 450W Solar Panel 108 Cell All-Black CWT450-108TNFB10 Assembled in the USA Wholesale 35 panels per pallet

CW Energy 450W Solar Panel 108 Cell All-Black CWT450-108TNFB10 Assembled in the USA Wholesale 35 panels per pallet

  • Rated Power Output 450 W
  • Voltage (VOC)39.31 V
  • Number of cells108
  • Cell TypeMonocrystalline
In stock
Pallet
= 36
ZNShine Solar 410W Solar Panel 108 Cell ZXM7-SH108-410 Wholesale 36 panels per pallet

ZNShine Solar 410W Solar Panel 108 Cell ZXM7-SH108-410 Wholesale 36 panels per pallet

  • Rated Power Output 410 W
  • Voltage (VOC)37.5 V
  • Number of cells108
  • Cell TypeMonocrystalline
Limited stock
Pallet
= 29
REC 445W Solar Panel 144 Cell REC445AA-72-XV Wholesale 29 panels per pallet

REC 445W Solar Panel 144 Cell REC445AA-72-XV Wholesale 29 panels per pallet

  • Rated Power Output 445 W
  • Voltage (VOC)53.2 V
  • Number of cells144
  • Cell TypeMonocrystalline
In stock
Pallet
= 31
GreenWatts 450W Solar Panel 144 Cell Bifacial HT72-166M-450W Wholesale 31 panels per pallet

GreenWatts 450W Solar Panel 144 Cell Bifacial HT72-166M-450W Wholesale 31 panels per pallet

  • Rated Power Output 450 W
  • Voltage (VOC)50 V
  • Number of cells144
  • Cell TypeMonocrystalline

By Truckload

In stock
Container
= 936
ZNShine Solar 410W Solar Panel 108 Cell ZXM7-SH108-410 Commercial 936 panels per Container (Truckload)

ZNShine Solar 410W Solar Panel 108 Cell ZXM7-SH108-410 Commercial 936 panels per Container (Truckload)

  • Rated Power Output 410 W
  • Voltage (VOC)37.5 V
  • Number of cells108
  • Cell TypeMonocrystalline

Ready to ship on Feb 24–27

In stock
Container
= 936
Sunpro Power 440W Solar Panel 108 Cell All-Black Bifacial SPDG440-N108M10 Commercial 936 panels per Container (Truckload)

Sunpro Power 440W Solar Panel 108 Cell All-Black Bifacial SPDG440-N108M10 Commercial 936 panels per Container (Truckload)

  • Rated Power Output 440 W
  • Voltage (VOC)38.53 V
  • Number of cells108
  • Cell TypeMonocrystalline

Ready to ship on Feb 20–25

In stock
Container
= 806
Thornova Solar 440W Solar Panel 108 Cells All-Black Bifacial TS-BBT54(440) Container 806 panels (Truckload)

Thornova Solar 440W Solar Panel 108 Cells All-Black Bifacial TS-BBT54(440) Container 806 panels (Truckload)

  • Rated Power Output 440 W
  • Voltage (VOC)39.16 V
  • Number of cells108
  • Cell TypeMonocrystalline

Ready to ship on Feb 24–27

In stock
Container
= 936
ZNShine Solar 440W Solar Panel 108 Cell All-Black Bifacial ZXM7-UHLDD108-440 Commercial 936 panels per Container (Truckload)

ZNShine Solar 440W Solar Panel 108 Cell All-Black Bifacial ZXM7-UHLDD108-440 Commercial 936 panels per Container (Truckload)

  • Rated Power Output 440 W
  • Voltage (VOC)38.8 V
  • Number of cells108
  • Cell TypeMonocrystalline

Ready to ship on Feb 24–27

In stock
Container
= 726
GreenWatts 450W Solar Panel 144 Cell Bifacial HT72-166M-450W Commercial 726 panels per Container (Truckload)

GreenWatts 450W Solar Panel 144 Cell Bifacial HT72-166M-450W Commercial 726 panels per Container (Truckload)

  • Rated Power Output 450 W
  • Voltage (VOC)50 V
  • Number of cells144
  • Cell TypeMonocrystalline

Ready to ship on Feb 20–25

In stock
Container
= 728
Mission Solar 430W Solar Panel 72 Cell MSE430SX9Z Assembled in the USA Commercial 728 panels per Container (Truckload)

Mission Solar 430W Solar Panel 72 Cell MSE430SX9Z Assembled in the USA Commercial 728 panels per Container (Truckload)

  • Rated Power Output 430 W
  • Voltage (VOC)49.26 V
  • Number of cells72
  • Cell TypeMonocrystalline

Ready to ship on Feb 24–27

  • Overview
  • Articles

400 Watt Solar Panels


400-450 watt solar panels deliver high efficiency in a compact form, ideal for homeowners, cottage owners, and small business operators building medium-sized systems of 5-15 kW. These panels balance upfront costs with long-term energy yield, targeting above-average income users in the USA prioritizing reliability and performance.

⚡ Quick Overview: Panels in the 400-450W range generate 1.5-2.0 kWh daily under average US conditions, making them perfect for roofs of 800-2000 sq ft homes or small commercial spaces. Their 108-144 cell monocrystalline design achieves 20-22% efficiency, outperforming older 300W models in space-constrained installations.

What Makes 400-450W Panels Right for Your Setup?

These panels suit medium-sized systems because they scale efficiently without requiring excessive roof space. Homeowners can offset 30-50% of electricity bills, cottage owners ensure reliable off-grid backup, and businesses cut peak demand charges effectively.

🏠 Homeowners

Perfect for 800-2000 sq ft homes looking to offset utility bills without covering the entire roof

🏕️ Cottage Owners

Ideal for off-grid backup systems with reliable performance in variable weather conditions

🏢 Small Businesses

Excellent for reducing peak demand charges while maintaining compact commercial installations

Performance Across US Climates

Production varies significantly by location and insolation levels. Understanding your regional solar potential is crucial for accurate system sizing and ROI calculations.

Region Daily Production (per panel) Annual kWh (400W) Key Factors
Southwest (AZ, NM, NV) 2.0 kWh/day 730 kWh Excellent sun, minimal clouds
Midwest (IL, OH, IN) 1.6 kWh/day 584 kWh Moderate sun, seasonal variation
Northeast (NY, MA, PA) 1.4 kWh/day 511 kWh Lower winter output, good summer
Pacific Northwest (WA, OR) 1.3 kWh/day 475 kWh Diffuse light, PERC tech helps
Expert Tip 1

Pair 400W panels with MPPT charge controllers to boost yield by 20-30% over PWM in partial shade—essential for cottage roofs with trees or business arrays near HVAC units. The investment in MPPT technology pays for itself within 2-3 years through increased energy production.

Top 400-450W Panel Comparison

Current models available from A1 SolarStore offer diverse options across efficiency, pricing, and warranty tiers. This comparison focuses on real-world availability and pricing as of January 2026.

Model Wattage Efficiency Voc (V) Cells Price Range Warranty Best For
JA Solar JAM72S10-410/MR 410W 20.7% 50.12 144 $137 (Clearance) 12/25 yr Budget clearance
LONGi LR5-54HPB-410M 410W 21.2% 37.4 108 $202 12/25 yr All-black aesthetics
ZNShine ZXM7-SH108-410 410W 20.4% 37.5 108 $0.32-$0.36/W 12/25 yr Wholesale/Commercial
Regitec RMH54/415B1 415W 20.6% 37.45 108 $0.27/W 12/25 yr Value wholesale
Regitec RMHT54/430AB2 430W 21.0% 38.49 108 $0.28-$0.29/W 12/25 yr Bifacial all-black
JA Solar JAM78S10-440/MR 440W 21.3% 53.0 156 $241 (Clearance) 12/25 yr High efficiency clearance
JA Solar JAM78S10-445/MR 445W 21.5% 53.31 156 $224 (Clearance) 12/25 yr Premium clearance
GreenWatts HT72-166M-450W 450W 20.8% 50.0 144 $0.37/W 12/25 yr Bifacial budget
CW Energy CWT450-108TNFB10 450W 21.7% 39.31 108 $0.34-$0.39/W 12/25 yr USA-made, IRA credits

💡 Current Availability: Clearance models offer significant savings but limited stock. Wholesale options (pallets of 31-36 panels) and commercial containers (620-936 panels) provide the best per-watt pricing for larger projects.

Real Cost of 400-450W Panel Systems

Understanding total system costs beyond panel pricing is essential for accurate budgeting. Here's a breakdown of typical medium-sized installation expenses:

Single Panel Costs

  • Clearance retail: $137-$241 per panel
  • Wholesale pricing: $0.27-$0.39 per watt
  • Commercial bulk: $0.25-$0.34 per watt
  • Premium US-made: $0.34-$0.39 per watt

Complete System (10-panel, 4kW)

  • Panels: $1,400-$2,400
  • Racking: $800 ($0.20/W)
  • Inverter: $1,200 ($0.30/W)
  • Labor & permits: $2,600-$5,600
  • Total pre-incentive: $6,000-$10,000

🇺🇸 US-Made Advantage: CW Energy panels assembled in the USA qualify for additional IRA manufacturing credits, reducing effective cost by up to 30% beyond the standard Investment Tax Credit. Combined savings can drop installed costs to $0.70/W for qualifying projects.

ROI Calculator for 400-450W Systems

Calculating return on investment helps justify the upfront expense and plan financing. Use this framework to estimate your specific payback period:

How do I calculate payback period?

Formula: Payback Period = Net System Cost ÷ Annual Savings

Example (10-panel 4kW system in Arizona):

  • Gross cost: $8,000
  • 30% ITC credit: -$2,400
  • Net cost: $5,600
  • Annual production: 7,300 kWh
  • Utility rate: $0.15/kWh
  • Annual savings: $1,095
  • Payback: 5.1 years
What affects ROI calculations?

Positive factors:

  • Higher local electricity rates (faster payback)
  • State/utility rebates beyond federal ITC
  • MACRS depreciation for businesses (26% first year)
  • Net metering policies with 1:1 credit
  • Battery backup avoiding demand charges

Negative factors:

  • Poor net metering policies
  • High financing interest rates
  • Excessive shading reducing output
  • Installation delays increasing soft costs
Expert Tip 2

Size arrays at 120% of peak load for cottages—e.g., 12 panels for 4kW demand—to handle surges without clipping losses. This oversizing prevents inverter saturation during optimal production hours and extends equipment lifespan by reducing thermal stress.

25-Year Financial Projection

Year Production (kWh) Savings @ $0.15/kWh Cumulative Savings Panel Degradation
1-5 7,300/yr $1,095/yr $5,475 0.4%/yr
6-10 7,156/yr $1,073/yr $10,840 0.4%/yr
11-15 7,014/yr $1,052/yr $16,100 0.4%/yr
16-20 6,874/yr $1,031/yr $21,255 0.4%/yr
21-25 6,736/yr $1,010/yr $26,305 0.4%/yr
Net Profit (minus $5,600 cost) $20,705 ~370% ROI

400-450W vs. Higher Wattage Panels: Trade-offs

Comparing panel sizes helps determine the optimal configuration for your specific roof and energy needs.

Aspect 400-450W Panels 500-600W Panels
Roof Space Required 20-25 sq ft/panel 25-30 sq ft/panel
Average Cost/Watt $0.27-$0.40 $0.25-$0.35
10kW System Panel Count 22-25 panels 17-20 panels
10kW System Cost $7,000-$10,000 $8,500-$9,500
Shading Tolerance Good (half-cut cells) Better (multi-busbar)
Installation Complexity Simpler racking, lighter weight Heavier, requires reinforced mounts
Best Application Residential roofs, modular systems Commercial, ground-mount

✅ Winner for Medium Installs: 400-450W panels win for modular residential and small commercial systems, avoiding oversized panel fragility while maintaining excellent efficiency. They're easier to handle during installation and provide more layout flexibility on complex roof geometries.

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