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Tongwei Solar Panels

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Tongwei Solar is stocked in two monocrystalline series, TWMND and TWMNH, covering 430–640 W between them. What sets the brand apart here is the efficiency floor: no item drops below 22.0%. TWMND spans 430–625 W at 22.0–22.8% efficiency, TWMNH spans 470–640 W at 22.5–23.7%. At the same rating a TWMNH module yields more watts per square metre, which is what decides the choice on a constrained roof.

The range covers five formats: 96, 108, 132, 144 and 156 half-cells. The most compact module, TWMNH-48HW470, produces 470 W at 23.5% efficiency from a 1762×1134×30 mm frame weighing 23.7 kg. That is the highest output of any module we stock in the 1762×1134 mm frame. At the other end sits the TWMND-78HD625 on 156 cells, 2465×1134×30 mm, 34.6 kg, the longest module in our catalogue.

Open-circuit voltage across the range is 36.55–55.80 V and current at maximum power point 12.93–17.22 A. That spread is wide, so take the figures for the specific model before laying out a string: the TWMND-78HD625 at 55.8 V Voc gives the shortest permissible string, while the TWMNH-66HD620W at 17.22 A is the first to hit the MPPT input current limit.

Frequently Asked Questions

How many Tongwei panels make 10 kW?

Sixteen TWMND-72HD590W modules give 9.44 kW; sixteen TWMNH-66HD640W give 10.24 kW. A 10 kW inverter with oversizing headroom normally takes 17–20 panels. Where roof area is the constraint, count watts per square metre rather than modules: at 23.5% efficiency the TWMNH-48HW470 returns more from the same area than any TWMND unit.

What is the difference between the TWMND and TWMNH series?

Efficiency and frame formats. TWMND covers seven items from 430 to 625 W at 22.0–22.8% efficiency, including the longest 156-cell module at 2465×1134×30 mm. TWMNH covers five items from 470 to 640 W at 22.5–23.7%, including the compact 96-cell TWMNH-48HW470. Where roof area is not the limit the difference is mostly price per watt; where it is, choose TWMNH.

Which Tongwei panel gives the most power in a compact frame?

The TWMNH-48HW470: 470 W from a 1762×1134×30 mm frame at 23.5% efficiency and 23.7 kg. One installer can lift it without lifting gear, and it returns more per square metre than most large-format modules. Its Voc of 36.55 V is the lowest in the range, so more of these fit in a string than 144-cell modules at around 53 V.

Which Tongwei panels are bifacial?

Four items: TWMND-72HD590, TWMND-72HD590W, TWMNH-54HD500 and TWMNH-66HD640W. A bifacial panel carries rear glass instead of a backsheet and weighs more — the TWMNH-66HD640W is 32.2 kg. The rear-side gain is real on ground mounts and flat light-coloured roofs; on a pitched roof mounted flush to the covering there is nothing to reflect and the premium does not pay back.

Can Tongwei panels share an array with another brand?

Only on separate strings or separate MPPT inputs. Series-connected modules run at the lowest current in the string, and the spread from 12.93 A to 17.22 A within the Tongwei range alone is already enough to matter, let alone across brands. The working rule is one model per string with matched orientation and tilt; mixing belongs at the inverter input level.