SunPower Maxeon Solar Cells in Stock: 125 mm & 166 mm IBC

Last updated: September 2026. Stock and cut options checked against the live product pages.

Yes, genuine SunPower solar cells are still available: LinkSolar stocks two formats, 125 mm Gen 3 and 166 mm Gen 6 interdigitated back contact (IBC) cells, both from Maxeon production and sold as surplus. Each format ships full or cut, with the electrical bin stated on the product page. Stock orders process in 1–3 business days.

This page is for builders wiring their own packs, university and R&D labs that need a documented bin, and OEM buyers sourcing cells to a drawing. It covers what we hold, how to verify it, and how to order.

TL;DR

• Formats: 125 mm IBC cells, full or cut (Gen 3, Me3 bin, 3.75 W typical) and 166 mm IBC cells (Gen 6, Mn1 bin, 6.60 W typical).
• Cuts: half, 1/3 and 1/6 on the 125 mm, half, 1/4 and 1/8 on the 166 mm, center strips on both, custom down to about 35 × 22 mm.
• How to verify: no front busbars on a back contact cell, the bin printed on the product page, then Voc and Isc against the typical values.
• How to order: 10- and 20-piece packs ship straight from the product pages, bulk and cut-to-drawing go through a quote.

What we hold: 125 mm Gen 3 and 166 mm Gen 6 IBC cells

We hold two formats of genuine SunPower Maxeon cells in stock: 125 mm on the Gen 3 platform in the Me3 bin, and 166 mm on the Gen 6 platform in the Mn1 bin. Both are IBC cells — interdigitated back contact, so both electrical contacts sit on the rear face and nothing shades the front. Each format ships full, in three pre-cut sizes, or as a center strip.

Values below are typical at STC, per cell, at the Vmp/Imp point rather than open circuit.

Cutting a cell does not change its voltage. A one-sixth 125 mm cut still reads 0.621 V, the same as the full cell, because voltage is set by the junction rather than by area. Current is what scales: the same one-sixth cut passes 1.01 A instead of 6.05 A.

Both formats stay in stock because they solve different problems. A 125 mm cell fits small panels and high-voltage, low-current strings, where six one-sixth cuts in series make 3.73 V at 1.01 A. A 166 mm cell gives watts per cell instead, 6.60 W against 3.75 W, so the same array needs fewer cells and tab joints.

Bin, pack size and cut options sit on each listing: the 125 mm cells with all four cuts and the 166 mm cells, full or cut. Still choosing a size? Our breakdown of the two formats works through the cut geometry.

Why the official channel closed, and what "genuine surplus" means

The buying route for these cells changed because both companies behind them went through insolvency proceedings. SunPower Corporation filed for Chapter 11 in August 2024, and Maxeon Solar Technologies, the company that made the cells, entered court-supervised restructuring in Singapore in April 2026.

Genuine surplus means factory-made Maxeon IBC cells drawn from existing inventory and sold on under first-sale. The cells came off the original production platforms, Gen 3 in the 125 mm format and Gen 6 in the 166 mm format, and reached the secondary market as unbranded stock. Reselling material that has already had its first sale is ordinary trade, and it is the accurate description of what sits on our shelves.

Three distinctions decide whether a cell listing is worth reading at all:

• Not new production. No line is running either format to fill orders, so the available quantity is whatever the inventory holds and formats disappear when a bin runs out.
• Not cells pulled from modules. Cells recovered from laminated panels carry solder residue, ribbon scars and micro-cracks. What we stock is loose cell material that was never laminated, not salvage.
• Not a counterfeit. Copies of back-contact cells circulate under both names, so treat the electrical signature as the proof and the wording on a listing as a claim that still needs checking.

LinkSolar buys and resells this stock as an independent trader. We are not affiliated with, endorsed by, or acting for SunPower or Maxeon, and we hold no rights in either trademark. Those names appear on this page to identify what the hardware is, nothing more.

The corporate history sits outside a supply page, so we wrote it up separately: whether SunPower is still in business, and whether Maxeon and SunPower are the same company. For a buyer in 2026 the deciding question is narrower: verified provenance and a bin you can check, rather than the brand name attached to the listing.

How to verify what you receive

Four checks confirm a tray of SunPower Maxeon IBC cells is what the listing says: the rear contact pattern, the bin on the product page, a multimeter reading in direct sun, and an IV curve comparison. None of them needs lab equipment. Run them on two or three cells before the rest goes into storage. The U.S. Department of Energy's solar photovoltaic cell basics page explains why the front contact grid exists on standard cells, which is exactly what an IBC cell lacks.

1. Look at the back, not the front. IBC stands for interdigitated back contact: both contacts sit on the rear, so the sun-facing side carries no busbars and no gridlines. Silver fingers across the front mean it is not back-contact.
2. Match the bin to the typical parameters. Gen 3 125 mm cells ship in the Me3 bin, Gen 6 166 mm cells in the Mn1 bin, and each product page carries typical STC output for that bin: 0.621 V / 6.05 A at maximum power for a full 125 mm cell, 0.60 V / 11.0 A for a full 166 mm one. What the bin letters mean tells you more than grade wording in a title.
3. Measure Voc and Isc outdoors. In full sun a multimeter reads Voc above the maximum-power voltage and Isc above the maximum-power current; Isc tracks irradiance, so a hazy-day reading comes in low and proves nothing. Our guide to testing and wiring SunPower cells has the method.
4. Compare IV curves, not headline watts. Two cells can hit the same peak wattage and differ under load, which an IV curve reading shows and a wattage figure hides. Cut cells follow the same rule: voltage stays essentially constant, current scales with area.

Every listing states the platform and bin it ships from, so readings across a tray should track each other. Send us the numbers if several samples read low.

C60, E60J and A300 name generations and formats, not bins. Our decoder for those listing codes maps each one to its format.

Which format and cut for which build

Pick the voltage first, then the area. Every piece sits near 0.6 V at maximum power, full cell or cut cell, so the count of pieces in a series string sets the output voltage. Cut size then sets the current, because current scales with cell area.

A worked example: ten 125 mm pieces in series give about 6.2 V in every cut option. Full cells reach that at 6.05 A and 3.75 W each; 1/6 cuts reach it at roughly 1.0 A and 0.63 W each. Same voltage, one sixth of the current, one sixth of the footprint.

Center strips and custom shapes go down to about 35 × 22 mm, cut by laser scoring and mechanical separation. The 125 mm and 166 mm format comparison sets the two side by side if you are still choosing.

Ordering: stock packs, bulk, custom cutting, cells to module

SunPower Maxeon IBC cells can be ordered three ways: packs straight off the product pages, a quoted order for bulk volume or a custom cut, or finished mini panels built from the same cells. Which route fits depends on whether you need a listed size, your own size, or a laminated module. All three draw on the same verified surplus stock.

Stock packs

Every cut option is listed in 10-piece and 20-piece packs, so an order can go through checkout without a quote step. Both formats have their own listing: the 125 mm cell page and the 166 mm cell page, with every cut option grouped in the solar cells collection. Sample quantities go through the same checkout at the pack price shown, and in-stock orders process and ship in 1–3 business days.

Bulk and custom cuts

Send a drawing, or the target voltage and current you need, and we quote against the same stock; our walkthrough of the cut service covers what a usable drawing has to state. Cutting is laser scoring followed by mechanical separation, with a practical floor around 35 × 22 mm, and pre-tabbed cells with the interconnect ribbon already soldered on can be priced into the same quote. Send your drawing or target output to open one.

From cells to a finished module

The same cells are cut and laminated into custom mini panels, so a build can move from loose cells to a sealed module on one material spec. We source the laminate, front sheet and junction hardware through our partner factories, and the cell format you tested on the bench stays the cell format inside the panel. Bring outline dimensions and a target output to the custom panel page.

Ratings live at module level, not cell level. A laminated panel is what gets tested to IEC 61215 and IEC 61730, and its enclosure rating such as IP67 comes from the lamination and junction box, so a bare cell carries none of these marks. Our partner factories for lamination run ISO 9001 quality systems, and for charging builds we recommend an MPPT controller over a PWM unit so the higher string voltage of IBC cells is not wasted.

Universities and research labs can order on a purchase order instead of card checkout, and our buyer's guide for university purchasing walks through the paperwork and lead time questions procurement asks first.

Buyer FAQ

Are these new SunPower cells?

No, these are genuine surplus SunPower Maxeon cells: factory-made IBC stock held in inventory and sold under first-sale, not new production. Surplus in this sense also rules out cells recovered from used modules and look-alike copies. LinkSolar is an independent seller of that stock, and the product pages state the platform and bin for each format.

Is SunPower still in business?

Not as the original company. SunPower Corporation filed for Chapter 11 in August 2024 and the brand name now trades under different ownership, while Maxeon Solar Technologies, which manufactured these IBC cells, entered court-supervised restructuring in Singapore in April 2026. Our article on whether SunPower is still in business follows that ownership trail.

What is the difference between C60, Gen 3 and Gen 6?

C60 is the classic 125 mm Gen 3 cell format, and Gen 6 is the larger 166 mm format. Both are interdigitated back contact (IBC) cells. Format sets current per cell rather than voltage, so a full 166 mm cell delivers about 6.60 W at STC against 3.75 W for a full 125 mm cell. ME1 is a different Gen III bin from the Me3 cells we hold, so listings quoting ME1 efficiency figures describe a different bin; our SunPower Maxeon Gen III C60 ME1 efficiency guide explains how to read those numbers.

Can you cut cells to my drawing?

Yes, down to roughly 35 × 22 mm. Send a drawing, or the target voltage and current, and we cut from the same stock using laser scoring and mechanical separation. Voltage per piece stays essentially constant after cutting while current scales with the remaining area, so the target current tells us which cut to quote.

Do you ship worldwide and who handles customs?

Yes, we ship worldwide, and in-stock orders process in 1–3 business days. Import duties and taxes are collected by the carrier at the destination where they apply, so they sit outside the order total. Shipping terms and which costs sit with which party are stated on the quote, because that varies by destination and carrier.