--- title: "HT-SAAE HT54-18X(PD)-F 420W 420W Solar Panel - Specs & Review | ComparePV" description: "HT-SAAE HT54-18X(PD)-F 420W 420W solar panel. Specs: 21.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ht-saae-ht54-18x-pd-f-420w" updated: 2026-09-11 --- # HT-SAAE HT54-18X(PD)-F 420W Space saver, heavy for its output 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** HT-SAAE - **Model:** HT54-18X(PD)-F 420W - **Series:** HT54-18X(PD)-F - **Rated power:** 420 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 400-450 W (954 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 420 W | 410 W | Typical | | | Module efficiency | 21.50% | 20.60% | Strong - top 4% | 7,958 | | Power density | 215.1 | 206.2 | Strong - top 3% | 7,882 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 10% | 8,545 | | Weight (kg) | 24.0 kg | 22.0 kg | Weak - bottom 24% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.50% | 20.60% | Strong - top 4% | 7,958 | | Power density | 215.1 | 206.2 | Strong - top 3% | 7,882 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 10% | 8,545 | | Weight per kWp | 57.1 | 53.0 | Weak - bottom 24% | 11,083 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Strengths - **215.1 watts per square metre** - Top 3% of the PERC 400-450 W segment, against a median of 206.2. Ranked 7,882nd in the whole database. - **21.50% module efficiency** - Top 4% of the PERC 400-450 W segment, against a median of 20.60%. Ranked 7,958th in the whole database. - **-0.330 %/°C temperature coefficient** - Top 10% of the PERC 400-450 W segment, against a median of -0.350. ### Watch out for - **57.1 kg per kWp** - Bottom 24% of the PERC 400-450 W segment, against a median of 53.0. - **Best for:** Residential, commercial, shaded-installations and BIPV. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 420 W - **Efficiency:** 21.50 % - **Voltage at Pmax (Vmp):** 31.74 V - **Current at Pmax (Imp):** 13.24 A - **Open-circuit voltage (Voc):** 37.63 V - **Short-circuit current (Isc):** 14.14 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.330 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.042 %/degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 24.0 kg - **Area:** 1.95 m2 - **Power density:** 215.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 83.5 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.50 % - **Output after 30 years:** 351 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7958 of 14005 | | Power density | 7882 of 14005 | | Temperature coefficient | 8545 of 14005 | | Weight | 11083 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Bifacial Glass-Glass Construction** - The bifacial glass-glass design delivers measurable rear-side energy gains from ground reflectance (5–30% additional yield depending on albedo), while offering superior mechanical strength and lower long-term degradation compared to standard glass-backsheet modules. Particularly advantageous in ground-mount installations and gravel-ballasted rooftops. - **Half-Cut PERC – Improved Shade Tolerance** - Splitting cells in half reduces series resistance and limits power loss under partial shading — PVEL research indicates that half-cut modules lose up to 30–40% less power under typical linear shading than full-cell modules. This is especially relevant in urban rooftop environments with chimneys and dormers. - **30-Year Linear Power Warranty** - The manufacturer guarantees module output for 30 years, exceeding the standard warranty offered by many PERC competitors — for example, Phono Solar TWINPLUS also offers 30 years but at the same 420 W power class with 20.98% efficiency, while HT-SAAE achieves comparable or better efficiency at up to 21.5%. Power warranty coverage is among the best in its segment. - **BNEF Tier 1 / Bankable Manufacturer Since 1998** - HT-SAAE (Shanghai Aerospace Automobile Electromechanical Co.) is consistently ranked in BNEF Tier 1 and appears on the PVEL PV Top Performers list (2024) across 7 test categories — including damp heat, LID+LETID, and hail resistance. Bankability reduces financial risk for project financing. - **Full Black Variant Available** - The all-black aesthetic option enables discreet integration with dark roof tiles and facades without the cost premium of BIPV modules. A direct peer — the Solarspace SS8-54HSB Lumina I (420 W, 21.51% efficiency) — offers the same variant, confirming that HT-SAAE remains aesthetically competitive. ## Cons - **Series Discontinued (2023)** - The HT54-18X(PD)-F was manufactured exclusively between 2021 and 2023. End-of-production status means limited availability of replacement modules for physical warranty claims, no future certificate updates, and difficulties expanding an existing installation with identical-spec modules. - **PERC Technology – Older Generation Standard** - The series is based on P-type PERC cells, while direct competitors from 2023–2026 are migrating to N-type TOPCon — offering lower LID, higher yield at elevated temperatures, and a better temperature coefficient of approximately –0.29 %/°C versus –0.35 %/°C for PERC. For new installations, this translates to a lower annual energy yield per unit of roof area. - **12-Year Product Warranty – Below Market Average** - The mid-premium segment standard in 2023–2026 is 15–25 years of product warranty (e.g., Solarspace and Phono Solar both declare 15 years). The 12-year product warranty on the HT54-18X(PD)-F provides shorter coverage against manufacturing defects and may be a limiting factor for project finance on commercial installations requiring a minimum 15-year product warranty. ## About this series The HT-SAAE HT54-18X(PD)-F series consists of bifacial mono modules featuring a glass-glass construction, designed to genuinely increase energy yield in locations where every square inch counts, whether on rooftops or in fields. **Dual-sided operation** harnesses reflected light from the ground surface, offering a noticeable advantage in installations on light-colored roofs, gravel, or with appropriately selected mounting geometry. Meanwhile, **half-cut design** minimizes internal losses and improves performance under partial shading - crucial in typical urban conditions (chimneys, window frames, trees). A key feature of this series is the **glass-glass construction**, enhancing atmospheric resistance and stabilizing performance over the long term, thereby reducing the risk of efficiency drops. For investors valuing aesthetics, an optional **full black** variant is available, easily integrated into modern roofing and façades. This is an excellent choice for homes, small businesses, and projects where monofacial competitive panels simply leave potential energy unrealized. ## Notable figures - Efficiency of 21.5% is 0.9pp above the \*\*PERC 400-450W\*\* median (20.6%) - Power density of 215.1 W/m² packs 8.9 W/m² more into the same footprint vs \*\*PERC 400-450W\*\* median (206.2 W/m²) - Temperature coefficient of -0.33%/°C matches the \*\*PERC 400-450W\*\* median - At 24.0 kg, this panel is 2.0 kg heavier than the \*\*PERC 400-450W\*\* median (22.0 kg) - more demanding for installation crews - #7958 for efficiency, #8545 for temperature performance out of 14005 panels ## Questions ### Is the HT-SAAE HT54-18X(PD)-F series still available for purchase? The HT54-18X(PD)-F series has been discontinued and is no longer part of HT-SAAE's regular lineup. Availability may vary — some distributors may still have units in stock, so it's worth checking directly. If you need a comparable bifacial PERC glass-glass module, ask your supplier about the current HT-SAAE equivalent that replaced this series. ### What warranty does HT-SAAE offer on the HT54-18X(PD)-F panels? HT-SAAE backs the HT54-18X(PD)-F series with a 12-year product warranty covering manufacturing defects and materials. On top of that, a 30-year linear power output warranty guarantees the module retains a specified percentage of its rated power over three decades. The 30-year performance guarantee is among the longest in the industry and is a key factor when calculating the system's LCOE. ### What are the real-world benefits of bifacial technology in the HT54-18X(PD)-F, and when does it pay off? The HT54-18X(PD)-F captures sunlight from both the front and rear surfaces, converting reflected irradiance (albedo) into additional energy. The gain depends heavily on the surface beneath the array: light-colored gravel, white roofing membranes, or snow can add several percentage points to annual yield. Bifacial modules deliver the greatest benefit in ground-mounted systems with adequate ground clearance or on flat, light-colored rooftops. On dark sloped roofs, the rear-side gain is negligible. ### Does the half-cut cell layout in the HT54-18X(PD)-F help under partial shading? Yes. The half-cut PERC cell design reduces internal resistance and limits power loss when part of the panel is shaded by a chimney, dormer, or tree. The module is electrically split into two independent halves, so shading one section does not fully disable the other. In urban rooftop installations where perfect exposure is rarely achievable, this translates into meaningfully higher annual energy production compared to conventional full-cell modules. ### Why does the glass-glass construction of the HT54-18X(PD)-F matter for long-term system reliability? Standard modules use a polymer backsheet that is susceptible to moisture ingress, micro-cracks, and UV degradation. The HT54-18X(PD)-F replaces the backsheet with a second glass pane, significantly improving resistance to humidity, thermal cycling, and mechanical stress. The result is more stable output parameters over time, lower risk of PID (potential-induced degradation), and a module lifespan that realistically supports the 30-year power warranty. ### How does the full black variant of the HT54-18X(PD)-F look on a modern roof, and are there any trade-offs? The full black variant features a black frame, dark rear glass, and black PERC cells, creating a uniform, low-profile appearance that blends seamlessly with dark roof tiles, slate, or contemporary facades. The aesthetic upgrade comes with a minor trade-off: the darker surfaces absorb more heat, which can slightly reduce efficiency on very hot days. In Central European climates this effect is minimal and rarely outweighs the visual and architectural benefits. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/1711543761-0-5bd60774df99.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Just Solar JST-EDMH-(445-465)W-TD (465W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-465w-class) | 465 W | +45 W, lighter, +2.3 pp | | [Luxor Solar LX-465M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-465m-182r-96-gg) | 465 W | +45 W, cooler, +2.3 pp | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | Cooler, +2.2 pp, +10 yr warranty | | [AIKO AIKO-A470-MAH54Mb](https://comparepv.com/panel/aiko-aiko-a470-mah54mb) | 470 W | +50 W, cooler, +2.1 pp | | [AIKO AIKO-A460-MAH54Mb](https://comparepv.com/panel/aiko-shenzhen-aiko-digital-energy-technology-co-ltd-aiko-a460-mah54mb-1) | 460 W | +40 W, cooler, +2.1 pp | | [TCL Zhonghuan HSM-BD54-LA470](https://comparepv.com/panel/tcl-zhonghuan-hsm-bd54-la470) | 470 W | +50 W, cooler, +2.1 pp | | [HT-SAAE HT54-18X(PD)-F 400W](https://comparepv.com/panel/ht-saae-ht54-18x-pd-f-400w) | 400 W | -20 W, -1.0 pp | | [HT-SAAE HT54-18X(PD)-F 405W](https://comparepv.com/panel/ht-saae-ht54-18x-pd-f-405w) | 405 W | -15 W, -0.8 pp | | [HT-SAAE HT54-18X(PD)-F 410W](https://comparepv.com/panel/ht-saae-ht54-18x-pd-f-410w) | 410 W | -10 W, -0.5 pp | | [HT-SAAE HT54-18X(PD)-F 415W](https://comparepv.com/panel/ht-saae-ht54-18x-pd-f-415w) | 415 W | Very close match | | [HT-SAAE HT54-18X(ND)-F 425W](https://comparepv.com/panel/ht-saae-ht54-18x-nd-f-425w) | 425 W | Cooler, +0.3 pp | | [HT-SAAE HT54-18X(ND)-F 430W](https://comparepv.com/panel/ht-saae-ht54-18x-nd-f-430w) | 430 W | +10 W, cooler, +0.5 pp | | [HT-SAAE HT54-18X(ND)-F 435W](https://comparepv.com/panel/ht-saae-ht54-18x-nd-f-435w) | 435 W | +15 W, cooler, +0.8 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +75 W, cooler, +3.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +85 W, cooler, +3.2 pp | --- Source: https://comparepv.com/panel/ht-saae-ht54-18x-pd-f-420w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.