Collection: Aiko Solar Panels: ABC Technology & 30-Year Warranty

ABC stands for All Back Contact. In conventional solar cells (PERC, TOPCon), metal contact lines run across the front of the cell — these block a portion of the incoming light. In ABC cells, both the positive and negative contacts are fully moved to the rear. The result: the entire front surface is actively light-absorbing, with no shading whatsoever from contact lines.

In practice, this means three things. First, higher module efficiency: the current Neostar models in our range are among the highest-efficiency residential panels — significantly higher than common N-Type TOPCon panels (typically 21–22%) or PERC panels (19–21%). Second, an exceptionally low temperature coefficient: at higher roof temperatures, an ABC panel loses less power than a TOPCon or PERC panel. Third, a fully black front surface with no visible lines — aesthetically distinctive for residential projects where roof appearance matters.

The current models in our range are third-generation Neostar (indicated by "3P" or "3S+" in the model name). First and second-generation Neostar models are End-of-Life or not included in our range.

All Neostar models in our range use the same N-Type ABC cell architecture and the same temperature coefficient. The difference lies in the construction, weight and fire safety class. The comparison below is at construction and line level — refer to the current product pages above for the exact specifications of the model carried.

View the current models above for the exact Wp class and datasheet per model, or contact us via our contact page for tailored project advice.

Aiko Solar applies a linear power warranty structure to the Neostar series with one of the lowest degradation rates in the industry — characteristic of the N-Type ABC architecture. The warranty on all current models in our range is backed by Munich RE® as an independent warranty partner.

For comparison: common PERC panels typically have an annual degradation of 0.45–0.55%/year and TOPCon panels 0.40–0.45%/year. The Neostar series structurally outperforms on this point — refer to the datasheet for the exact value of the chosen model.

All Aiko Neostar models in our range are compatible with modern 1,500V DC systems. When configuring a string, the open-circuit voltage (Voc) and short-circuit current (Isc) per model determine the number of panels per string and the inverter selection. The exact electrical parameters (Voc, Vmp, Isc, Imp) are in the datasheet of the current model — refer to the product page above.

As a guideline: models with more cells have a higher Voc. When combining panels in a single string, always calculate the Voc at minimum ambient temperature and verify it against the maximum input voltage range of your inverter. We supply Aiko panels preferably in combination with hybrid inverters from Solis and GoodWe — both brands support 1,500V DC systems.

Note that current Neostar models may use different connector types (Original MC4 or MC4-EVO2A). Verify connector compatibility with your inverter and cabling before installation — see the product page of the chosen model. For an exact tailored string calculation, refer to our battery calculator or technical support.

All current Neostar models are certified to IP68 (junction box water resistance) and Class II (double insulation). The glass-glass variants are certified to IEC Fire Safety Class A; the mono-glass variant to IEC Class C. Check local fire safety requirements for your project before model selection.

The glass-glass construction provides enhanced mechanical protection and resistance to micro-cracks. Refer to the datasheet of the current model for the complete certification list, hail resistance, operating temperature and maximum static load values — these may vary per model.

ABC panels are inherently less susceptible to partial shading than conventional PERC or TOPCon panels due to their back-contact architecture — there are no front contacts acting as a shading source. Nevertheless, partial shading on the cell surfaces themselves (e.g. from a chimney, antenna or tree branch) can lead to measurable power loss. The following diagnostic protocol helps distinguish shading-related loss from other causes.

1. Check inverter data. Compare the daily yield (kWh) of the relevant string with a reference period without shading. A consistently lower pattern at specific times of day indicates a structural shading source.
2. Identify the shading source. Visually inspect the roof for new obstacles (antennas, ventilation pipes, moss, bird droppings). Also check whether neighbouring panels or roof edge profiles cast shade at low sun angles (morning/evening, winter).
3. Measure the open-circuit voltage (Voc) per string. A significantly lower Voc than the theoretical value may indicate a defective bypass diode or a damaged panel — not necessarily shading.
4. Check the junction box (IP68). Visually inspect for moisture ingress, corrosion or loose connections. All current models are IP68-certified, but mechanical damage from installation error or external impact can compromise the protection.
5. Consult the installation manual for the specific bypass diode configuration of your model and contact us via our contact page for persistent unexplained loss.