Solar and green-energy cleanroom manufacturer
Solar cleanroom manufacturer: cleanrooms for solar-cell production and PV modules
Your cell technology sets the class. A particle on a cell is efficiency lost for good. We build the rooms that protect it.
- ISO Class 7 to 8
- Mono, poly and thin-film
- Solar film and PV modules
- Panels made in-house
- Validated to ISO 14644
We have delivered 2,000+ controlled environments since 2004, across every industry that needs controlled air. We build solar-cell, solar-film and PV-module cleanrooms for mono, poly and thin-film lines, at ISO 7 to 8 and validated to ISO 14644. Every class is certified before handover. We manufacture the panels for every room we build.
- ISO 7 to 8
- Production class
- 2004
- Delivered since
- 2,000+
- Controlled environments
What a solar cleanroom is
A solar cleanroom is a contamination-controlled room, typically ISO 14644 Class 7 to 8. Solar cells, solar film and photovoltaic modules are made inside it, without the airborne particles that cost conversion efficiency and shorten module life in the field.
- ISO 14644 Class 7 to 8
- Monocrystalline
- Polycrystalline
- Thin-film and solar film
- PV module assembly
It covers monocrystalline, polycrystalline and thin-film routes, from cell handling through coating support, lamination and module assembly. Which cell technology you run decides the room you need. That is where every solar scope starts.
Order a clean room for solar cell production and you are really ordering three things at once. There is the room, the modular panels it is built from, and the HVAC that holds the class. Solar panel cleanroom solutions have to cover all three. Leave one out and the room will not hold its class.
At a glance
- Production class
- ISO Class 7 for the sensitive cell steps, ISO Class 8 for module assembly
- Standard
- ISO 14644-1, certified on the meter before handover
- Filtration
- HEPA H13 at 99.95 percent and H14 at 99.995 percent against MPPS, per EN 1822
- Routes covered
- Monocrystalline, polycrystalline, thin-film and solar film
- Room envelope
- Modular PUF and Rockwool panels, made in-house
Why a clean line is a more efficient line: the yield stakes
In solar manufacturing, dirt does not announce itself. A particle that lands on a cell will not break the panel on day one. It quietly takes a sliver of conversion efficiency. You never get that back.
Months later it shows up as a module that fades early in the field. Solar is a yield game played at huge volume. A small contamination loss, repeated across millions of cells, is the line between a profitable factory and a struggling one. A controlled room protects the efficiency and the field life you are already paying to build in.
ISO 7 to 8
The band photovoltaic manufacturing runs in, per ISO 14644-1
So we build for exactly that. Photovoltaic manufacturing runs at ISO 7 to 8. That means HEPA-filtered air, controlled particle loading, and stable temperature and humidity. Four things have to be true at once:
- Across every stepThose conditions have to hold across cell handling, texturing, coating support, lamination and module assembly. The class follows the process step, not the address on the building.
- Shift after shiftYield and batch consistency depend on them holding shift after shift, evenly, across a large floor. A hall that is in class at one end and out of class at the other is not in class.
- On cleanable surfacesThe surfaces have to be modular and cleanable, with seamless flooring, because a finish that sheds is a particle source inside the room you just paid to clean.
- Set by your processYour cell technology and your process step set the target class. That is the first decision below, and it is the one everything else is priced against.
Cell type to cleanroom class, contamination risk and yield
The fastest way to scope a green-energy cleanroom is to start from the cell technology. Each route carries a different contamination sensitivity, and a different yield exposure. This matrix maps the three production routes to the room they need.
How to read it
Find your cell technology on the left and follow that row across. The four values are the whole brief: the class the process needs, the contamination that specifically hurts that chemistry, what it costs you in yield when it is not controlled, and the room feature that controls it. One row at a time is lit, because one row at a time is what you actually have to specify.
- 01
Monocrystalline (mono-Si)
High-efficiency wafers and cells through texturing, diffusion and coating support, then metallisation
- Room class it needs
- ISO 7 for the sensitive cell steps. ISO 8 for assembly.
- Contamination that hurts it
- Particles and handling damage on high-value wafers, and surface contamination before coating.
- Yield consequence
- Highest cost per cell, so each lost cell hurts most. Tight class protects efficiency.
- Room feature that controls it
- HEPA terminal housings over the cell steps, with gowning and material-entry control at the boundary.
- 02
Polycrystalline (poly-Si / multi-Si)
Cast multi-crystalline cells through similar process steps
- Room class it needs
- ISO 7 to 8, depending on the step.
- Contamination that hurts it
- Particle loading during handling, texturing and coating support.
- Yield consequence
- Lower cost per cell than mono but high volume, so consistency across the batch is the win.
- Room feature that controls it
- Uniform air-change rate and even delivery end to end, so the class does not drift across the hall.
- 03
Thin-film (a-Si / CdTe / CIGS) and solar film
Deposited and laminated layers, and solar-film stacks
- Room class it needs
- ISO 7 to 8, with deposition support areas tighter.
- Contamination that hurts it
- Particle inclusion in deposited layers and in solar-film lamination.
- Yield consequence
- Defects are layer-level: a single inclusion can fault a whole module area.
- Room feature that controls it
- The tightest class on the line over deposition and lamination, on seamless low-particle finishes.
FIG. 01Enter at your own cell technology on the left and follow that row across: the class the process needs, the contamination that hurts that chemistry, the yield consequence when it is not controlled, and the room feature that controls it. The reading path walks one row at a time and holds on the completed row. At rest, and under reduced motion, all three rows are lit and readable at once.
The same mapping as a table you can paste into a specification:
| Cell technology | Room class it needsTHIS PAGE | Contamination that hurts it | Yield consequence | Room feature that controls it |
|---|---|---|---|---|
| Monocrystalline (mono-Si)High-efficiency wafers and cells through texturing, diffusion and coating support, then metallisation | ISO 7 for the sensitive cell steps. ISO 8 for assembly. | Particles and handling damage on high-value wafers, and surface contamination before coating. | Highest cost per cell, so each lost cell hurts most. Tight class protects efficiency. | HEPA terminal housings over the cell steps, with gowning and material-entry control at the boundary. |
| Polycrystalline (poly-Si / multi-Si)Cast multi-crystalline cells through similar process steps | ISO 7 to 8, depending on the step. | Particle loading during handling, texturing and coating support. | Lower cost per cell than mono but high volume, so consistency across the batch is the win. | Uniform air-change rate and even delivery end to end, so the class does not drift across the hall. |
| Thin-film (a-Si / CdTe / CIGS) and solar filmDeposited and laminated layers, and solar-film stacks | ISO 7 to 8, with deposition support areas tighter. | Particle inclusion in deposited layers and in solar-film lamination. | Defects are layer-level: a single inclusion can fault a whole module area. | The tightest class on the line over deposition and lamination, on seamless low-particle finishes. |
FIG. 02Classes per ISO 14644-1. Class per step is confirmed against your line spec on request.
Whichever technology you run, the principle is the same. The more sensitive and the more valuable the step, the tighter the class. Mono cells justify the tightest control, because each cell is worth the most. Thin-film and solar-film lines protect deposited layers and laminate stacks. Poly lines win on consistency at volume.
Start from the cell route
Tell us your cell route and we will set the class per step. Exact class-per-step is confirmed against your line spec on request.
Classification and ISO class for solar-cell manufacturing
There is no single number for a solar plant. The class is set step by step, and an older specification written in the retired US wording still has to be mapped onto the standard in use today.
Each ISO rung is a factor of ten. ISO Class 7 allows 352,000 particles at or above 0.5 micron per cubic metre; ISO Class 8 allows 3,520,000.
| ISO 14644-1 class | Where it is used on a solar line |
|---|---|
| ISO 7 | More sensitive cell handling, coating, and thin-film or solar-film deposition and lamination steps |
| ISO 8 | Module assembly and general PV production, including standard module lamination |
| Controlled (non-classified) | Staging, inspection, material entry and gowning |
| Legacy Class 10,000 / 100,000 | Federal Standard 209E wording, superseded by ISO 14644 in 2001. Class 10,000 maps onto ISO 7, Class 100,000 onto ISO 8 |
FIG. 03ISO 14644-1:2015. Federal Standard 209E was withdrawn in 2001.
The rule of thumb is simple. The more sensitive the step, the tighter the air has to be. Cell handling and coating support sit at the tight end of the scale. Module lamination and assembly can run a step looser.
Your cell technology and your process step decide the solar cell manufacturing cleanroom ISO class. There is no one-size number for a whole plant. We confirm the actual class and validate it to ISO 14644-1.
If your spec is written in the old wording
If an older spec quotes Class 10,000 or 100,000, that is retired wording from the standard the current one replaced. We simply map it onto the classes in use today, as the table above shows.
Clean-room panels for green-energy and renewable-energy manufacturers
A solar factory is a big, hard-working space, and the room has to earn its keep. It has to stay clean. It has to hold its class. And it has to survive a high-volume production floor for years.
That starts with the panels. We manufacture the clean-room panels that green-energy and renewable-energy manufacturers build their lines inside. Then we install the room around them and prove it works. The people running the line answer to one team, not five.
The wall and ceiling panels are modular and made in-house, with PUF and Rockwool infill. Honeycomb-infill panels are supplied and installed when a project calls for them. Modular cleanroom partitions zone the hall. That is what green-energy clean-room technology looks like at production scale.
Seamless epoxy or PU flooring, low-particle finishes and wide clear spans suit heavy line equipment. All of it is engineered for the ISO 7 to 8 class your cell technology demands. We build cleanrooms for renewable energy in India. Because the panels are ours, we control the finish, the joint detail and the airflow path that hold the class.
Made on our own floor
Modular wall and ceiling systems on PUF and Rockwool infill, plus modular cleanroom partitions, are manufactured in our own facility and installed by our own team. That is why the joint detail, the flush finish and the airflow path can be treated as one engineering decision rather than three suppliers' problems.
What a solar cleanroom must deliver
Four promises, and the engineering that keeps each one.
Air clean enough to protect yield.
ISO 7 for the sensitive cell steps, ISO 8 for assembly. The class follows the step, not the building.
Stable conditions across a big footprint.
Temperature, humidity and air-change rate hold even from one end of the hall to the other.
A durable, cleanable, modular build.
Seamless flooring and low-particle finishes, on clear spans wide enough for line equipment.
Production-scale HVAC, not comfort cooling.
Sized for a hall, not an office, so the class holds without eating the margin.
And the engineering behind those promises:
| Promise | Engineering detail |
|---|---|
| Controlled production class | ISO Class 7 to 8 per ISO 14644-1, HEPA-filtered AHUs, air-change rates and particle control sized to the process step, ACPH set per class |
| Stable conditions | Controlled temperature and relative humidity, stable ACPH, pressure cascade where required, uniform delivery across wide clear spans. This is the basis of yield and batch consistency |
| Durable, cleanable, modular build | In-house modular panels and cleanroom partitions, seamless flooring, low-particle finishes, clear spans for line equipment |
| Production-scale HVAC | AHU sizing, HEPA filtration and energy-aware design for large-footprint PV lines |
FIG. 04
Solar applications we engineer for
Every step on a solar line has its own contamination sensitivity. The room has to match it. This is the ground we cover.
- HEPA-filtered supply, marching down the hall
- Low-level return at the walls
- Panel envelope and modular partition
FIG. 05One hall, two classes. The cell steps and the solar-film deposition and lamination zones sit at ISO Class 7 behind a modular partition; module assembly, lamination, inspection and test run at ISO Class 8 across the larger clear span. The class follows the process step, which is why a solar plant is never one number.
- Solar-cell production across monocrystalline, polycrystalline and thin-film.
- Wafer and cell handling.
- Texturing and coating process support.
- Photovoltaic module assembly and lamination.
- Solar-film manufacturing.
- Inspection and test.
- R&D, pilot and full-scale lines.
Each of those steps needs its own room, with its own class and its own stability target. Those are the solar-energy clean manufacturing rooms we build. Solar-film manufacturers in particular run tight control on deposition and lamination. A single particle inclusion there can fault the layer. So those areas carry the tightest class on the line.
Solar / PV room types we build: R&D lab to full-scale line
Most solar programmes do not start at full scale. They start with a pilot room and grow. The room strategy should be planned that way from day one.
Cell-handling and process-support cleanrooms
The tight end of the line, where wafers and cells are handled between process tools.
Coating and texturing support areas
Controlled support space around the wet and coating steps, classed to the step it serves.
Lamination and module-assembly halls
Large-footprint ISO 8 space on clear spans, sized around laminators and stringers.
Solar-film manufacturing environments
Deposition and lamination zones carrying the tightest class on the line.
Controlled staging and inspection areas
Non-classified controlled space for material staging, inspection and test.
Gowning and material-entry control
The boundary rooms that decide what actually gets into the classified space.
Each one is built for the particle class and the production footprint a PV line needs. That runs from a small R&D and pilot room through to a full-scale production hall, so the same contamination discipline scales with the line. This is what a solar panel manufacturing cleanroom in India looks like in practice, sized to the volume you are building toward.
How we deliver
One team, one accountable line of sight, from the cell-type brief to the validated handover.
6 stages
Each one closes on a document you can audit, not a phone call
| Stage | What happens | Auditable deliverable |
|---|---|---|
| Class targetSTAGE 01 | We capture your cell technology, process steps and floor area as a user requirement specification (URS). Then we set the class for each zone. | An agreed class map |
| DesignSTAGE 02 | We design the room and its HVAC, and sign it off before anything is built. | Signed design and design qualification (DQ) |
| In-house manufactureSTAGE 03 | Panels, partitions and equipment are made on our own production floor. Equipment is factory-tested before dispatch. | FAT records (equipment) |
| InstallationSTAGE 04 | We install the room and its systems. Every install is checked against the design. | An installation qualification (IQ) dossier |
| CommissioningSTAGE 05 | We run the room and test what it actually does. That means HEPA filter integrity, airflow velocity and uniformity, and recovery. Particle counts are certified against the class target. | Certified OQ and PQ results |
| HandoverSTAGE 06 | You get the as-builts, the full test dossier and the equipment AMC. | A documented handover |
FIG. 06AMC and FAT apply to equipment only.
Nothing on that list is a milestone we mark ourselves. Each stage closes on a record that leaves our hands and goes into yours, which is what makes a solar programme auditable rather than merely well intentioned.
Where each stage is documented
Validation, documentation and compliance
We do not ask you to take the class on faith. Every stage is tested and documented before you take the keys.
Design qualification, or DQ, locks the engineering. Installation qualification, or IQ, verifies what was built. Operational qualification, or OQ, proves the systems run as designed. Performance qualification, or PQ, proves the room performs in use.
The filter is where most of that testing lands. EN 1822 rates H13 at a minimum of 99.95 percent and H14 at a minimum of 99.995 percent efficiency at MPPS, the most penetrating particle size, and a terminal housing only delivers that rating if the gel seal and the knife edge hold. That is what an integrity test on the day is actually looking for.
What you take away
Every result is certified and handed over as one documented package. The class is not taken on trust. It is proven on test day and written into the dossier. AMC and FAT apply to equipment only.
FIG. 07Section through a terminal HEPA filter. Unfiltered air enters the plenum, crosses the pleated glass microfibre pack, and leaves as a clean unidirectional sheet. EN 1822-1 rates H14 at a minimum 99.995 % efficiency at MPPS, the most penetrating particle size, which sits between 0.1 and 0.3 µm and is the hardest size for any filter to catch. In a unidirectional zone the design face velocity is typically 0.45 m/s ± 0.05.
Four tests decide whether the room is what the drawing said it was:
| Test on the day | What it proves |
|---|---|
| HEPA filter integrity (PAO/DOP) | No leaks through or around a terminal filter |
| Airflow velocity and uniformity | The ceiling delivers even, stable flow across the floor |
| Recovery testing | The room returns to its class quickly after a disturbance |
| Particle-count certification to ISO 14644-1 | The room meets its class on the meter, not just on paper |
FIG. 08Particle counts certified to ISO 14644-1. Filter integrity per EN 1822 grades.
Why Fabtech for a solar cleanroom
We design the room, build it, validate it, and make the panels. So a green-energy manufacturer scoping a line deals with one accountable team.
We start from your cell technology and set the class per step. Then we prove it and certify the result at handover. Our solar work covers three things. Solar-cell rooms, solar-film rooms and PV-module assembly halls, all designed around yield. That is what Fabtech solar solutions means.
One team for the class target, the HVAC, the validation and the handover.
What we manufacture in-house (solar)
The room envelope and the cleanroom equipment below both come from our own facility. That means modular wall and ceiling systems on PUF and Rockwool panels, plus modular cleanroom partitions. Honeycomb-infill panels are supplied and installed when a project calls for them.
On the equipment side: air-handling units, terminal HEPA housings and FFUs, pass boxes, air showers and cleanroom doors. All of it is built to suit large PV production footprints, from a pilot room through to a full production hall.
Solar cleanrooms, common questions
Solar cell production typically runs at ISO 14644-1 Class 7 to 8. Cell handling and coating support sit at ISO 7, module assembly and lamination at ISO 8. Your cell technology and process step set the exact solar cell manufacturing cleanroom ISO class, confirmed and validated on test day.
Yes. We design, build and validate controlled rooms and modular partitions for solar-film and thin-film production. One particle inclusion in a deposited layer can fault a whole module area. So deposition and lamination zones carry the tightest class, certified to ISO 14644 on test day.
Yes. We manufacture the clean-room panels that green-energy and renewable-energy manufacturers build their lines inside. That covers modular wall and ceiling systems and partitions, with PUF or Rockwool infill. Honeycomb-infill panels are supplied and installed when specified. We then install the room around them and prove it works.
Yes. The contamination-control principle is the same across monocrystalline, polycrystalline and thin-film, but the class is tuned to each route. Mono lines justify the tightest control, because each cell is worth the most. Poly lines win on batch consistency at volume. Thin-film and solar-film lines protect deposited and laminated layers.
Because every particle that settles on a cell during manufacturing lowers conversion efficiency for good, and shortens module life in the field. At solar's production volumes, a small contamination loss repeated across millions of cells erodes yield directly. A controlled ISO 7 to 8 room protects that efficiency.
Yes. We are an India-based solar cleanroom manufacturer with our own panel production, so a solar panel manufacturing cleanroom in India is scoped once and carried by one team. We design, build, supply the HVAC and validate solar-cell, solar-film and PV-module cleanrooms across the country. We build cleanrooms for renewable energy in India on the same basis, with the room, the modular panels and the production-scale HVAC designed, built and validated to ISO 14644, as one scope. Turnkey solar cleanrooms run from R&D and pilot rooms to full-scale production halls, through to a validated handover.
Yes. Wide clear spans, production-scale HVAC, modular partitions and durable, cleanable finishes are designed for line equipment and high volume. The room then holds a stable class evenly across a large hall, shift after shift. That is what protects yield and batch consistency.
Proof: solar work, and the engineering behind it
Solar and photovoltaic manufacturers are on our delivered list. Their scope sits under their own disclosure permissions, so the names are here and the detail is on request.
FIG. 09The same cleanroom engineering has been delivered behind three different doors: pharmaceutical cleanrooms, biotech and research rooms, and a precision electronics floor. Each was certified to its ISO class and qualified design through performance. The name plate is the part that changes.
Underneath a solar reference is the same contamination control we run everywhere else. The same modular-cleanroom capability is proven across our pharma, biotech and research cleanrooms. Each of those rooms was delivered to a certified ISO class. Each was qualified in stages, design through performance, and handed over with the full qualification file.
At Bosch Nashik we held that same discipline on a precision electronics floor. Different industry, same particle problem, and the reason a module line and a tablet line end up asking us for the same things.
Scope, area and classification for each site above are held under that client's disclosure permissions, and we publish them only once the client releases them.
- Saatvik Green EnergySolar module manufacturer. Scope on request.
- Sangam SolarSolar module manufacturer. Scope on request.
- Pharmaceutical cleanroomsCertified ISO class at handover
- Biotech and research roomsQualified DQ through PQ
- Modular panel manufacturePUF and Rockwool, our own floor
Planning a solar line?
Tell the engineers who will actually spec it what you are running: cell technology (mono, poly or thin-film), process steps and floor area. We will set the class per step and scope it.