Warranty pick, weak in heat
The Exiom EX270-285P(B)-60 solar panel series is an advanced solution based on high-efficiency polycrystalline cells, which have been designed to maximize energy yields while maintaining optimal investment costs. These modules stand out for their exceptional stability of electrical parameters, which directly translates into long-term energy security for users. Thanks to the use of technology preventing potential-induced degradation, these panels solve the problem of premature power loss, which is crucial in the variable weather conditions typical of the Polish climate. The frame construction provides increased resistance to mechanical loads, such as accumulated snow or strong wind gusts, making them an ideal choice for rooftop installations in regions with harsher atmospheric conditions. This series is dedicated primarily to investors seeking a balance between modern technology and economy, performing perfectly in both households and smaller commercial facilities. Compared to the competition, the Exiom EX270-285P(B)-60 stands out with precise production quality control and the use of tempered glass with high light transmittance, allowing for more efficient use of solar radiation even at a low angle of incidence. Choosing this series is a guarantee of reliability and predictability of energy production over many years of photovoltaic system operation.
Ranking
Signals from the data
Residential and commercial.
Hot climates.
Top 20% of the PERC 250-300 W segment, against a median of 25 yrs.
Bottom 15% of the PERC 250-300 W segment, against a median of -0.370.
The manufacturer offers a 30-year linear power output warranty — at the time of the series' production run (2015–2021), this exceeded the prevailing 25-year industry standard common among multicrystalline segment manufacturers. The extended warranty improves long-term financial predictability for the installation.
A peak module efficiency of 17.4% places the series well above the Solitek SOLID Solrif (14.45%) and only 0.12 percentage points below leading contemporaries — the Yingli LF285P6-60 and Lina Energy LPEPV 60 SUPERIOR (both at 17.52%). For a 60-cell multicrystalline module, this is a highly competitive result.
The integrated potential-induced degradation (PID) prevention technology is particularly relevant in systems operating at high DC voltages, typical of Polish three-phase arrays exceeding 600 V DC. It mitigates premature power loss — a critical factor over a 30-year operational horizon.
The frame is engineered to withstand elevated snow and wind loads, making it a key advantage for rooftop installations in Poland where snow loads can exceed 1.5 kN/m² in mountainous and sub-alpine regions.
The use of tempered glass with an anti-reflective coating and enhanced transmittance improves energy yield at low solar incidence angles — particularly relevant in the Polish climate from October through March, when the solar elevation angle falls below 25°.
The EX270-285P(B)-60 modules have not been in production since approximately 2021. Availability of identical replacement modules is limited to distributor warehouse stock. In the event of a single panel failure within an existing array, electrical matching to a module from a different series may be impractical or cost-prohibitive.
Per the available data (tier_1_bankable: false), the series was manufactured before Exiom Solution achieved bankable manufacturer status. This complicated project financing via bank loans or leasing arrangements that require warranties from a BNEF Tier-1 recognized manufacturer.
Multicrystalline cells exhibit higher annual degradation rates (typically 0.7–0.8%/year versus 0.45–0.55%/year for mono PERC/TOPCon). Over a 30-year warranty period, the elevated degradation rate results in proportionally lower actual energy yield at end-of-warranty compared to modern technologies available from approximately 2018 onward.
The series is monofacial (is_bifacial: false). Competing modules released concurrently or after 2018 began offering bifacial technology in this power class, generating an additional 5–15% yield gain from albedo reflection. For installations on high-reflectance surfaces — gravel, concrete, or snow — this represents a tangible production loss.
- Efficiency of 17.4% is 2.1pp below the PERC 0-400W median (19.4%)
- 175.2 W/m² power density is 19.2 W/m² below PERC 0-400W median (194.4 W/m²) - requires larger installation area
- -0.41%/°C temperature coefficient - 0.05pp worse than PERC 0-400W median (-0.36%/°C), expect higher hot weather losses
- 18.5 kg weight - 2.0 kg lighter than PERC 0-400W median (20.5 kg), reducing installation effort
- #13367 for efficiency, #13738 for temperature performance out of 14005 panels
Specifications
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
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