Weltrus PV Modules: 100W-700W TOPCon Product Overview
Key Takeaway
Weltrus offers crystalline PV modules across a catalog span of about 100 W to 700 W. That span is not one bill of materials. Internal parameter tables currently name three TOPCon bands: 465-490 W, 540-560 W, and 645-670 W. Efficiency, voltage, current, outline, and mass are read from the row that matches the model. Any wattage outside those three rows follows the datasheet for that model.
Table of Contents
When a Catalog Span Is Treated as One Module
A buyer comparing module suppliers often starts with a range: 100 W through 700 W, TOPCon, half the conversation already finished. The range answers a commercial question. It says the factory can discuss small modules and large modules. It does not answer an engineering question. A 100 W module and a 670 W module do not share a frame length, a pallet, a string voltage, or a nameplate current.
The mix-up shows up in the bid file. A slide prints one efficiency for “the Weltrus TOPCon line.” A spreadsheet copies one open-circuit voltage into every power bin. A container estimate uses one kilograms-per-watt figure for the whole catalog. None of those shortcuts matches the way the parameter tables are actually written. The tables are band by band. The purchase order is model by model.
This page is the map of that catalog. It is not a wattage picker. Choosing 450 W versus 550 W versus 660 W for a roof bay, a tracker table, or a 1500 V string is a separate decision, and Weltrus already publishes a note on how to make it. Use this page to see which bands have a stated electrical and mechanical row, which fields those rows share, and which fields you still have to request by model code.
What an Overview Can and Cannot Settle
Treat the 100 W to 700 W statement as a boundary on the conversation, not as a specification. Inside that boundary, three TOPCon bands have internal parameter tables you can cite: 465-490 W, 540-560 W, and 645-670 W. Each band is a power window on one outline. The watts on the label are the bin inside that window. The outline, the mass, and the voltage belong to the window, not to every watt the catalog mentions.
Several fields are printed the same way on all three tables. Maximum system voltage is 1500 V DC. The temperature coefficient of maximum power is -0.26% per degree C. The degradation line is first year 1.0% or less, then 0.35% per year. Bifaciality is 80% with a tolerance of plus or minus 10 percentage points, which this note reads as a factor from 70% to 90% under the test the datasheet names. Those shared lines are still lines on three tables. They are not a blanket issued for a 100 W code or a 700 W code that does not appear in the tables.
Other fields change with the outline, and they change in ways a watts-only comparison will miss. Width and thickness are 1134 mm and 30 mm on all three. Length is not: 1762 mm, 1990 mm, and 2382 mm. Mass is not monotonic with power. The 540-560 W band is 25.0 kg. The lower-power 465-490 W band is 28.0 kg. The 645-670 W band is 34.0 kg. A buyer who sorts the catalog by watts and assumes the heavier module is always the higher wattage will misstate the pallet and the roof lift.
Current is the other quiet field. Short-circuit current is 15.92 A, 16.09 A, and 16.16 A. The spread is 0.24 A while nameplate power moves from the mid-400 W window to the mid-600 W window. Power on these tables moves with length and with open-circuit voltage (38.20 V, 43.19 V, and 51.40 V), not with a large step in current. Do not multiply open-circuit voltage by short-circuit current and call the product nameplate watts. Maximum power is a different point on the I-V curve. The bin on the label is the nameplate.
Efficiency is a band, not a single family number, and it is not a 22.5% ceiling. The 465-490 W table prints 23.3-24.5%. The other two tables print 23.9-24.8%. A quotation that says “up to 22.5%” is describing something other than these three rows. A quotation that lifts 24.8% and pastes it onto a 100 W or 700 W code is also describing something the tables do not say. Ask for the efficiency line on the datasheet of the model code you will receive.
One low-light line is not a family line
The 465-490 W table prints a low-light figure of at least 96% at 200 W per square meter. The 540-560 W and 645-670 W tables, as used in this note, share degradation and bifaciality with that first table. They do not, in the facts available here, repeat the low-light figure. If you need low-light performance for those bands, the datasheet for that model controls. Read whether any 96% figure is versus nameplate or versus irradiance-scaled power. Those are different comparisons, and only the datasheet line defines which one was used.
Parameter Tables for Three TOPCon Bands
The figures below are the internal parameter tables for these three TOPCon bands. They are standard-test values except where a row says otherwise. Standard test conditions are 1000 W per square meter, 25 degrees C cell temperature, and the AM1.5 spectrum. They are not operating power on a hot roof.
| Band | Efficiency | Voc | Isc | Outline | Mass |
|---|---|---|---|---|---|
| 465-490 W | 23.3-24.5% | 38.20 V | 15.92 A | 1762 x 1134 x 30 mm | 28.0 kg |
| 540-560 W | 23.9-24.8% | 43.19 V | 16.09 A | 1990 x 1134 x 30 mm | 25.0 kg |
| 645-670 W | 23.9-24.8% | 51.40 V | 16.16 A | 2382 x 1134 x 30 mm | 34.0 kg |
How to read a row
Each row is a power window on a fixed outline. A 560 W label and a 540 W label on the second row share the 1990 mm length, the 25.0 kg mass, the 43.19 V open-circuit voltage, and the 16.09 A short-circuit current printed for that band. They do not share a single efficiency point. Efficiency runs from 23.9% to 24.8% across the window. When the purchase order names a bin, the bin’s watts are the nameplate. The voltage and current used for string design are the values on that model’s datasheet, which should match this row if the model sits in the band.
Maximum system voltage on each of these three tables is 1500 V DC. The temperature coefficient of maximum power on each is -0.26% per degree C. That coefficient describes how power moves when cell temperature moves. It is not the temperature coefficient of open-circuit voltage, and it is not a degradation rate. String length in cold weather has to use the open-circuit-voltage coefficient on the datasheet. This overview does not supply that coefficient. If it is missing from the page you hold, ask for it. Do not borrow it from another wattage.
Degradation on these three tables is printed as first year 1.0% or less, then 0.35% per year. Read the first year as a cap on loss, so the end of year 1 is at least 99.0% of nameplate. Years 2 through 30 are 29 steps. Twenty-nine times 0.35% is 10.15 percentage points. The end of year 30 is 88.85% of nameplate. That arithmetic is the floor implied by those two rates. It becomes enforceable when the limited warranty for the model on the purchase order prints the same rates. IEC 61215 and IEC 61730 are type tests on a sampled design. Passing them does not create a 30-year outdoor measurement, and it does not replace the warranty PDF.
Bifaciality of 80% plus or minus 10 percentage points is a module factor under a stated test. It is not the extra energy a roof or a field will produce. Rear-side gain depends on height, albedo, row spacing, and shade on the back of the module. Keep the factor in the module column and the gain in the yield model. A bifacial factor does not add watts to the front-side nameplate unless the warranty text says so.
Selection Boundaries
Use the three rows when the model code you are buying sits inside 465-490 W, 540-560 W, or 645-670 W and the datasheet revision matches the table. Outside those windows, stop. A 100 W module, a 300 W module, a 630 W module, and a 700 W module can all be real Weltrus conversations. They are not filled in by nearest-neighbor copying. The datasheet for that model controls open-circuit voltage, short-circuit current, efficiency, outline, mass, low-light behavior, and the degradation line.
- Do not treat 22.5% as the ceiling of these tables. The printed bands sit above that figure. Also do not treat 24.8% as a promise for every Weltrus module from 100 W to 700 W.
- Do not treat the low-light line as shared. At least 96% at 200 W per square meter is printed for the 465-490 W table in this note. Confirm it on the other bands before you put it in a yield model.
- Do not infer cell count, glass construction, connector type, or mechanical load in pascals. Those items are absent from the tables used here. The datasheet and the installation manual for the model state them.
- Do not use this page to pick a wattage. Area, cold-weather voltage, handling weight, and the inverter still decide the bin. The catalog map only tells you which parameter row you are allowed to cite.
- Do not read a type-test certificate as a serial-level warranty. Keep the IEC file and the limited warranty side by side. The certificate names a design. The warranty names a warrantor, a model list, and a power schedule.
When you request a quotation, send the model code, the power bin, and the destination country. Ask for the datasheet revision that prints voltage, current, outline, mass, efficiency, the temperature coefficient of maximum power, and the temperature coefficient of open-circuit voltage. Ask whether that code is one of the three bands above. If it is not, do not attach this table to the bid. Attach the page that names the code.
Ask for the Datasheet That Names the Model
Send the model code and the power bin. Weltrus will match the parameter row that belongs to that code, or confirm that the code sits outside these three tables and needs its own page.
Frequently Asked Questions
Does the 100 W to 700 W span mean every Weltrus module shares one datasheet?
No. The span describes the catalog width, from small modules to large ones. The internal parameter tables in this note cover three TOPCon bands only: 465-490 W, 540-560 W, and 645-670 W. A model outside those bands, including a 100 W module or a 700 W module, follows the datasheet for that model.
Is 22.5% the maximum efficiency of these Weltrus TOPCon tables?
No. The 465-490 W table prints 23.3-24.5%. The 540-560 W and 645-670 W tables print 23.9-24.8%. Those bands are not a ceiling for every wattage from 100 W to 700 W, and 22.5% is not the cap these three tables describe.
Why is the 540-560 W band lighter than the 465-490 W band?
The tables print 25.0 kg for 540-560 W and 28.0 kg for 465-490 W. The outlines differ as well: 1990 x 1134 x 30 mm versus 1762 x 1134 x 30 mm. Mass follows the stated outline. Do not estimate kilograms from nameplate watts.
Do the three bands share one short-circuit current?
They sit close together, and they are not the same number. The tables print 15.92 A, 16.09 A, and 16.16 A. Nameplate power still changes because open-circuit voltage and length change. Use the current printed for the model you will receive. If that datasheet adds a bifacial operating current, use that figure for the fuse.
Does an IEC 61215 certificate make this overview a 30-year field record?
No. IEC 61215 and IEC 61730 are type tests on a sampled design. They are not a 30-year outdoor dataset. Where a table prints first-year loss of 1.0% or less and then 0.35% per year, 29 annual steps after year 1 put the end of year 30 at 88.85% of nameplate. The limited warranty for the model on the purchase order is the schedule you can enforce.
