Noble metal nanoparticles are the most widely used systems of plasmonic scatterers. They have been used for applications involving light harvesting, optical filters etc. However, scalability of technologies is impacted; this has to do with their prohibitive costs. Use of earth-abundant elements is thereby worth exploring. Al NPs, standalone is a reasonable solar spectrum scatterer, over a broad wavelength range (400–800 nm). But Al plasmonic response is sensitive to surface oxidation and corrosion, which compromises its performance when deployed in a device. Here we show that Al-In alloys are plausible choices. Al-In nanoalloys of diameter 85 nm show a scattering cross section of nearly 8 × 10 −14 m 2 . Al-In nanoparticles scattering cross-sections are invariant with In concentration. Furthermore, all features of Al plasmon resonance are retained making it relevant for solar applications. Al-In heptamers of diameter 150 nm show resonance and anti-resonance peaks at 510 nm and 590 nm wavelengths respectively; making it relevant for prospective filter applications. © 2019 Elsevier B.V.