Fix · Fault
MPPT not tracking on a roof: an idle tracker is shade or a mixed string.
ٹریکر سایا، ملی جلی واٹ، یا چھوٹی تار سے رکتا ہے۔ حد مت بڑھاؤ۔
Key takeaways
- We refuse a higher PV max.
- One wattage per MPPT.
- Shade is drawn before the order.
- The long guide is MPPT not tracking.
Long guide: MPPT not tracking. Shade: shade. Strings: string sizing. Hills in winter: winter voltage.
| Cause | Fix |
|---|---|
| Tank shadow | Move the string. See new Multan roofs. |
| Mixed wattage | Split the trackers |
| Cold morning over-voltage | Remove a module. Do not edit the ceiling. |
An idle tracker is shade or a mixed string
MPPT not tracking means the tracker is awake and the power is not following the sun. The causes to separate, without a repair recipe, are shade, a mixed wattage on one tracker, a string voltage outside the window, or a connector that is open. The long guide stays canonical. This stop-page sends you back to one rule: one wattage per MPPT. It does not raise the PV maximum, it does not tell you to open a live plug and wiggle it, and it does not tell you to bridge strings on the roof because a video looked quick. Photograph PV voltage and power at a known sunny hour, plus a roof photo that shows shade. Then stop editing.
A tank shadow after two o'clock on a new Multan roof is a drawing problem, not a cursed tracker. The string was placed where the tank would cover it, and the tracker is reporting that fact by going idle while the rest of the roof still produces. Move the string on paper first. New Multan roofs and the shade page are where that drawing lives. This fault page only insists you photograph the shadow and the noon watts before anyone touches a voltage ceiling. If the shadow is a neighbour's new storey, say so. The menu cannot see through a wall, and a higher limit will not.
What the noon photograph of an idle tracker must contain
Stand at the inverter when the sun is actually on the roof. Photograph PV watts, PV voltage, and the time in one frame if the screen allows it, or in two frames taken without a menu change between them. Write which roof face the string sees, and whether a tank, a parapet, or a tree is on that face. If you have two trackers, say which one is idle and which one is working. A working neighbour tracker is the cleanest proof that the hybrid itself is not dead. Do not disconnect a string to force the idle one to wake. Do not swap the two plugs on a live roof. An open connector is on the list of causes, and it is still not a reason to pull a live MC4.
The LCD wins for the hour you are standing there. If the app shows a flat line and the screen shows watts, believe the screen for that hour and take the comparison to the app-yield page later. Do not average the two and do not edit a register so they match. This page is about the tracker, not about the stick. Say in the note whether the idle period is a hard zero, a number that never climbs, or a number that falls only when the shadow arrives. Those three shapes are different visits. A hard zero at noon on a clear string points at voltage, an open lead, or a mixed set. A fall after two o'clock points at shade. Write the shape. Do not guess a code.
Keep one wattage on each MPPT
A mix of 585 W and 645 W modules on one tracker will drag the power even when someone insists the watts are close enough. Current still has to agree. Keep one wattage and one family on the tracker. The desk's ordinary house array is ten 645 W N-type modules, and that example is one family on purpose. If your carton is a different wattage, the carton wins, and you still do not mix it with the leftovers of an older set. Split the trackers. String sizing is the page that says whether the count of modules is inside the window. This stop-page does not reprint that design as a second calculator, and it does not authorise a parallel joint on the roof.
Different brands with the same sticker wattage are still a mix if the current and the voltage curve are not the same family. The existing short answer already says mixed current drags the tracker. Believe it. Do not parallel them because a seller matched the watt number on the quotation. Photograph the labels. If two labels share a tracker, that photo is the fault, and the fix is a split decided on paper before anyone unplugs a live lead. Bridging strings to average a mix is refused. This page does not describe the bridge. A video that shows two connectors forced together is not a method, and copying it can destroy a tracker input or start a heat fault at the plug.
Do not raise the PV maximum when the tracker is idle
Do not raise the PV maximum on an idle tracker
The voltage ceiling in the menu is the carton's limit, not a handle for a lazy string. Raising PV maximum is refused. It does not remove a tank shadow, it does not split a mixed wattage, and it does not lengthen a string that is too short for the window. If the morning trip is a cold over-voltage, the string is too long for that dawn, and the hills page owns the pattern. The honest direction is to take a module off the design, on paper first, then on a dead string, not to edit the ceiling so the inverter stops complaining. This page will not walk you through that removal. String sizing and a person who can kill the string do that work.
Heat clipping is the opposite shape and the wrong page if you treat it as a tracking failure. In a Multan June the power is simply lower than the STC sticker, the tracker is still following the sun, and the heat page is the expectation. Do not raise a ceiling because noon watts are below the brochure. Do not add a module in June to chase the brochure and then discover a cold-morning trip in January. Keep the two seasons apart in the note: high voltage at dawn belongs with winter voltage in the hills when that is truly the climate, and a lower but smooth noon curve in Multan belongs with heat. An idle tracker is neither of those if the curve is flat while the sun is on the glass.
The MPPT essay stays canonical
The long guide is MPPT not tracking. It stays canonical. This URL does not grow a second string-sizing chapter and does not publish a voltage table. You photograph noon watts, noon voltage, and the shade, you keep one wattage per tracker, and you refuse a higher PV maximum. If a connector looks browned, you leave it and you use the MC4 stop rather than pulling it while it is live. Send the noon set to 0300 0465810 or info@zarkaarpower.com and say which tracker is idle. Updated 2 October 2026. The carton beats any ceiling typed from a forum. Zarkaar Power will not coach a live unplug over the phone.
The decision on this MPPT URL is that an idle tracker is shade, a mixed string, or a voltage outside the window, proved by a noon photograph and handed to the tracking essay. A higher PV maximum is refused, and so is a roof-top bridge between strings. That decision would be false on a page about a grid sag or a pack that cut out at 1 a.m. If the curve is merely lower than STC in the Multan heat, you are on the heat page, not this one. If the trip is a cold dawn and the voltage is high, you are on the hills and string-sizing pages. This stop ends at the photo and the refusal.
| Shape of the idle tracker | Where the decision goes |
|---|---|
| Falls when the tank shadow arrives | Move the string. Shade page and the new Multan roof notes. |
| 585 W and 645 W on one MPPT | Split the trackers. One wattage, one family. |
| High voltage at a cold dawn | String sizing. Do not edit the ceiling. |
| Smooth but below the June brochure | Heat page, not a tracking fault. |
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
The app shows zero and the LCD shows watts. Which is right?
The LCD, for that hour. Then see the app-yield page.
Can I parallel different brands on one MPPT if the watts match?
Keep one wattage and one family. Mixed current still drags the tracker.
A water tank shades one row after 2 p.m. on a Bosan roof. Is the tracker faulty?
Usually the tracker is reporting the shadow. Photograph noon watts before the shade arrives and photograph them again when the tank covers the row, plus a wide roof photo that shows the tank. Do not raise the PV maximum to hide the dip, and do not unplug the string while it is live to test a bypass you saw online. The shade page and the new Multan roof notes are where the string gets moved on a drawing. This stop-page only separates that shape from a mixed wattage or a voltage window. The MPPT essay stays the long guide.
I already have 585 W modules and I want to add 645 W on the same tracker. Why not?
Because mixed wattage on one MPPT drags the tracker even when the sticker numbers look close, and mixed current does the same if the families differ. Keep one wattage and one family. The desk's ordinary example is ten 645 W N-type modules together, not a blend with an older 585 W set. If your carton is another wattage, the carton wins and the mix is still refused. Split the trackers on paper. Do not parallel the two strings on the roof. String sizing is the design page. This URL refuses the ceiling edit that people try when the blend looks weak.
The inverter trips at a cold dawn and the voltage looks high. Which page owns that?
The hills page owns a cold-morning over-voltage, together with string sizing, when the trip is at dawn and the voltage is high. This MPPT stop-page only tells you not to edit the ceiling to stay online. Taking a module off the string is a design change on paper, then a job on a dead string, and this site does not walk you through the unplug. Photograph the dawn voltage and the module count and send those. Do not add a higher PV maximum for the season. A Multan June curve that is simply below the brochure is the opposite visit and belongs on the heat page.
Noon power is lower than the sticker in June, but the curve still follows the sun. Is that this fault?
No. An idle tracker is flat or erratic while the sun is on the glass. A smooth curve that sits below the STC brochure in Multan heat is clipping and temperature, and the heat page is the expectation-setter. Do not raise a limit and do not condemn the tracker for doing physics. Photograph one sunny hour so you can show the curve is alive, then read the heat page rather than this one. If a shadow or a mixed label is also present, say that too, because a real tracking fault can hide inside a hot month. The long guide for a truly idle tracker remains the MPPT essay.
Can I join two strings on the roof so the idle tracker has more voltage?
No. Bridging strings on the roof is refused, and this page does not describe the joint. A video is not a design. The right moves are on paper: one wattage per MPPT, a string length inside the window, and shade drawn before the order. Photograph the present voltage and the labels, and take the count to the string-sizing page. Do not open a live connector to try the join for ten minutes. A wrong join can cook a plug or damage a tracker input. If you are unsure which tracker is which, the photograph of the screen is enough for one visit.
What should I send so nobody edits the voltage ceiling before they have seen the roof?
Send three things: PV watts and PV voltage at a known sunny hour, a roof photo that shows shade or the lack of it, and the module labels if more than one wattage shares the tracker. Write which MPPT is idle. Say whether the shape is a hard zero, a shadow after two o'clock, or a cold-dawn trip. Do not change the PV maximum before you send the set. The MPPT essay is the long guide, and string sizing is the count. Phone or WhatsApp 0300 0465810, or email info@zarkaarpower.com. The carton ceiling beats a typed experiment, and the desk will not raise it for you.