Monocrystalline Silicon (Single-Crystal Silicon) — Monocrystalline
Hardware Components
Monocrystalline, or Mono-Si, is a type of solar panel made from a single-crystal silicon ingot — one continuous crystal structure with no grain boundaries. The efficiency of monocrystalline modules is currently in the 19-23% range, with premium cells reaching 24-26% [ITRPV 2024].
The mono-Si production process begins with melting pure silicon, which is slowly drawn into a cylindrical silicon ingot (the Czochralski process), then sliced thinly into wafers of 166-210 mm. Because the entire wafer comes from one homogeneous crystal, electrons move more freely than in cells with many grain boundaries — this is why its efficiency is higher than polycrystalline.
In the global market, mono-Si has dominated with a solar module production share exceeding 95% in 2024, displacing polycrystalline, whose market share fell from ~30% (2018) to below 5% (2024) [ITRPV 2024]. Advanced technologies built on mono-Si substrates — including PERC (Passivated Emitter and Rear Cell) and TOPCon (Tunnel Oxide Passivated Contact) — use the same single-crystal wafer as their foundation.
Mono-Si panels are verified to PV module quality and reliability standards under IEC 61215 (Design qualification and type approval), which covers temperature, humidity, and thermal-cycle endurance tests.
Indonesian PLTS Application Example
On a limited-size Surabaya house roof (30 m² available for panels), choosing 22%-efficiency mono-Si allows installation of ~6 kWp in the same area that fits only 5 kWp using 18%-efficiency panels. With Surabaya's PSH of 4.9 kWh/m²/day [NASA POWER 1984-2023] and a performance ratio of 0.80, that extra 1 kWp produces an additional ~1,430 kWh per year — equivalent to bill savings of ~Rp 2 million/year at the 2026 non-subsidized R-1 tariff [PLN tariff adjustment Q1 2026].
Sources & References
- International Technology Roadmap for Photovoltaic (ITRPV), 15th Edition, 2024 (2024)
- IEC 61215, Crystalline silicon terrestrial photovoltaic (PV) modules — Design qualification and type approval, current edition
- IRENA, Renewable Power Generation Costs 2023, Solar PV chapter (2023)
- NASA POWER LARC, Surface meteorology and Solar Energy data set, climatology 1984-2023 (1984-2023)
See Also
Polycrystalline
(Polycrystalline Silicon)Polycrystalline, or Poly-Si, is a type of silicon solar panel made from molten silicon cooled rapidly so that it forms many small crystals (multi-crystalline) within a single cell [IEC 61215]. Typical module efficiency is 15-17%, lower than monocrystalline because the inter-crystal boundaries impede electron flow [ITRPV 2024].
TOPCon
(Tunnel Oxide Passivated Contact)TOPCon is a silicon solar cell architecture that adds a tunnel oxide layer and a thin polycrystalline silicon layer on the rear side of the cell to suppress charge-carrier recombination. Commercial TOPCon module efficiency reaches 22-24%, with laboratory cell records exceeding 25% [ITRPV, International Technology Roadmap for Photovoltaic, 2024 edition].
kWp
(Kilowatt-Peak)kWp, or kilowatt-peak, is the unit of nominal capacity of a solar panel measured at Standard Test Conditions (STC) — irradiance of 1000 W/m², a cell temperature of 25°C, and air mass 1.5 [IEC 61215]. In Indonesia, with a PSH range of 3.5-5.0 kWh/m²/day [NASA POWER 1984-2023], the kWp figure describes the theoretical peak output, not the actual daily electricity production under tropical field conditions.