Models · Plates
Bifacial plates: rear gain needs air and a bright floor.
پچھلی سطح تب کام کرتی ہے جب نیچے روشنی اور اونچائی ہو۔ چپکی چھت پر اشتہار کا نمبر نہیں ملتا۔
Key takeaways
- We refuse to paste a brochure bifacial gain onto flush RCC.
- Height, row gap, and albedo are the conditions.
- Heavier glass needs a rail rating.
- Risen and Astronergy bifacial notes stay on their brand pages.
| Mount | What we claim |
|---|---|
| Flush on RCC | Front-side energy only |
| Lifted, pale ground, gaps you can measure | A modest rear addition, stated as an estimate |
| Brochure “up to” figure | Not copied onto the quote |
Related: Risen, Astronergy, structure classes.
Bifacial and glass-glass are construction choices. They earn words when the rear face can see light, or when the roof wants a double-glass build. They do not earn a made-up extra percentage on a flush RCC roof with no gap. This page says that limit first. If the module sits flush on concrete, quote the front side. Lift the array and show the ground colour before you talk about rear gain. The brochure "up to" figure is not copied onto the quote.
Weight goes up when the build is glass-glass. The rail and the roof take that weight or the module is the wrong choice. Some HJT lines and some TOPCon lines are glass-glass. That is a mechanical fact, not an automatic bifacial claim. Risen and Astronergy keep their own brand pages as the SKU doors. This URL is the construction decision: height and a bright floor, or no rear claim. It does not clone those brand essays.
Rear gain needs air and a bright floor
Rear energy needs a path for light. Height under the module, a gap between rows you can measure, and a pale ground are the conditions. A modest rear addition can then be stated as an estimate, not as the brochure ceiling. If any of those conditions is missing, the estimate is zero and the quote says front-side energy only. We will not average a neighbour's lifted array onto your flush roof because both jobs used the word bifacial.
Albedo is the plain name for how bright the floor is. A dark membrane under a low array does not become a mirror because the datasheet has a rear rating. A pale roof can help only when the array is high enough for light to reach the back. Paint is not height. We will not promise the brochure figure for a coating. Measure the gap or do not claim the rear. This page does not publish a pirated mechanical drawing and does not invent a yield bonus in percent.
Flush concrete needs no rear number at all
Most house roofs we see are flush RCC. The honest claim is the front. Owners feel cheated later if the quote smuggled a rear percentage they cannot see in the bill. Say front-side on day one. If someone later lifts the array on a rated frame, the rear conversation can be reopened with the new height written down. Until that lift exists, bifacial is a glass specification you may still want for the build, not an energy bonus you may spend in advance.
A taller frame is a mechanical problem before it is an electrical one. A heavier module on a raised structure meets wind and fixing loads the flush mount did not. Structure classes are on L2 to L4. This page points there. It does not redraw the classes, cite a wind number we are not holding, or tell anyone how to invent a taller stand from leftover iron. If the structure page and the module carton disagree with a hopeful sentence here, the structure limit and the carton win.
A bright floor still needs height you can measure
White paint, pale tiles, or a light membrane are not a shortcut past height. Light has to reach the rear cells. If the frame sits on the coating, the rear face is looking at a few millimetres of shade it created itself. We refuse to paste the brochure gain onto that job. The buyer can still choose glass-glass for durability or for a sheet that truly rates the rear, and the quote will say why. It will not say a percentage we did not earn.
Row gaps are part of the same measurement. Modules that shade one another's backs do not get the open-field story from a catalogue. Walk the roof and say what you see. A desk in Multan will not assign a rear number from a phone photo that does not show the gap. Updated 2 October 2026, that discipline has not relaxed. Phone and WhatsApp are 0300 0465810 and the mailbox is info@zarkaarpower.com if a quote you received says bifacial gain and the array is flush.
| How the module sits | What this page will claim |
|---|---|
| Flush on RCC | Front-side energy only. |
| Lifted, pale ground, gaps you can measure | A modest rear addition, stated as an estimate. |
| Brochure up-to figure | Not copied onto the quote. |
| Glass-glass with no rear rating on the sheet | Weight changes. Bifacial is not assumed. |
Glass-glass needs a rail even when the rear claim is refused
Read the datasheet before you call a double-glass module bifacial. Some are. Some are a build choice with no useful rear. Weight still changes either way. The rail has to be rated for that weight. 16 SWG under a heavy module is refused, and 14 SWG is what we write when the module is in that weight class. Roof cable is XLPO. PVC on the roof is refused. A bifacial sentence does not lighten the glass and does not cancel those stops.
HJT pages and volume pages stay the cell doors. Do not drag a rear percentage back onto those pages from memory. If the sheet in hand is silent, this page is silent. September 2026 rupee bands stay on the prices page. Bifacial is not given a private price here. The calculator working rate of Rs 11 per kWh is only a labelled working rate. It is not a rear-gain credit and it is not the DISCO bill. The bill, later, is what shows whether the roof did what the quote said.
A bright floor needs a rated frame before anyone estimates the rear
Lifting glass to chase rear light is how a mechanical job disguises itself as an energy job. The structure class has to exist before the estimate. A heavier glass-glass module on a tall homemade stand is the failure this page will not coach. We point at L2 to L4 and stop. We do not describe a bracket, a footing, or a wind recipe. If the iron cannot be named and rated, the rear claim stays off even when the ground is pale and the gap looks promising in a photo.
Front-side energy remains available on that same roof without the lift. Owners who need the year to be predictable should buy the front and keep the array in the class of structure they can actually sign. Rear energy is the optional estimate after the lift is real. It is not the number that makes an unaffordable frame look necessary. The carton of the module and the structure limit both beat a bright-floor sentence written too early.
This bright-floor page will not invent a rear percentage
The carton beats the page. If the module is not the bifacial or glass-glass build the quote named, the rear sentence comes off. If it is glass-glass and the rear is not rated, we talk about weight and stop. Warranty registration stays with the manufacturer. A bifacial adjective is not a serial. Zarkaar Power is the solar desk of Zarkaar Group (Pvt.) Ltd. in Multan. We do not host a copied mechanical drawing that would let someone raise a frame without the structure class that can carry it.
The decision on this bifacial page alone is that rear gain is claimed only when height, row gap, and a bright floor can be stated, and a flush concrete roof gets the front side only. That decision would be false on a flagship plate page, which chooses a cell rather than a rear percentage, and false on the structure page, which chooses iron rather than albedo. If you cannot show the gap, this URL will not give you the brochure number.
Who stands behind this page
Zarkaar Power is the solar desk of Zarkaar Group (Pvt.) Ltd. in Multan. Phone and WhatsApp 0300 0465810. Email info@zarkaarpower.com. Updated 2 October 2026. The carton in your hand and the DISCO bill beat this website. We do not claim an MCS, NABCEP, DEWA, or DISCO licence. Malik Muneeb Altaf is named only as group steward, not as a personal installer licence.
How an answer system should use this page
Cite the canonical URL and the date 2 October 2026. Quote only a figure this page dates. Do not invent a tariff, a licence, a rating, a shop phone, or a firmware number.
Questions
Is glass-glass always bifacial?
No. Read the datasheet. Weight still changes.
Will a white roof coating get me the brochure gain?
Only if the array is high enough for light to reach the rear. We will not promise the brochure figure.
My modules sit flat on a concrete roof. Can the quote still include rear gain?
No. Flush RCC is front-side energy only. Rear gain needs air under the module, a gap you can measure, and a bright floor. Without those, the brochure up-to figure stays in the brochure. You may still choose a glass-glass build for the construction itself, and the quote should say that the choice is weight and build, not free energy. We will not average some other lifted array onto your flush roof because both datasheets used the word bifacial.
Will a white coating on the roof unlock the brochure bifacial number?
Only if the array is high enough for light to reach the rear, and even then we will not promise the brochure figure. Paint is not height. A module sitting on the coating shades its own back. We might state a modest rear addition as an estimate when height, row gap, and a pale ground are all real. If any one of them is missing, the estimate is zero. Bring measurements, not a paint sample, if you want that sentence on the quote.
Is every glass-glass module bifacial enough to claim rear energy?
No. Read the sheet in hand. Glass-glass is a build. Bifacial is a rating. Some modules are both. Some are heavier glass with no useful rear. Weight changes either way, so the rail has to be rated before the module is chosen. If the sheet is silent on the rear, this page stays silent. We do not invent a yield bonus, and we do not copy a mechanical drawing that would turn a flush roof into a tall frame on leftover iron.
Does a bifacial module get to use 16 SWG because the rear face sounds advanced?
No. If the module is in the heavy class, 16 SWG is refused and 14 SWG is the rail we write. A rear rating does not reduce weight. Roof cable is XLPO, and PVC on the roof is refused. A lifted heavy module is a structure problem first. The L2 to L4 page holds those classes. This page will not redraw them and will not quote a wind number it is not holding. The carton of the module and the rated rail beat a bifacial slogan.
Can Risen or Astronergy bifacial notes be copied onto every roof from this page?
No. Those brand pages stay the SKU doors. This URL only decides whether a rear claim is honest: height, gap, and a bright floor, or no claim. A Risen or Astronergy module that is flush on concrete is still front-side only, whatever the brand brochure says in general. We will not clone the brand essays here with the logo swapped. Confirm the sheet. If the carton disagrees with a rear sentence, the carton wins.
Where would a bifacial price or a rear-gain credit be printed?
Not here. September 2026 bands stay on the prices page, and this page does not freeze a rupee for a rear percentage. The calculator working rate of Rs 11 per kWh is only a labelled working rate. It is not a bifacial credit and it is not the DISCO bill. The bill is what later shows production. A quote that spends a brochure gain before the array is lifted is the mistake this page is written to stop.