Utilising biomass waste as a renewable energy source has gained a lot of interest as a means of reducing reliance on fossil fuels. Among the many types of biomass, tamarind fruit peel (Tamarindus indica), which is commonly discarded, holds promise as a feedstock for briquette production due to its favorable combustion properties. In order to ascertain the Higher Heating Value (HHV) of briquettes made from tamarind peel waste, this study employs proximate analysis, which takes into account the materials' moisture content, ash content, volatile matter, and fixed carbon. In this research, three models Wahid, Nhuchhen and Afzal, and Kieseler were comparatively analyzed to predict the HHV of tamarind peel briquettes. The study also explored the effects of particle size and binder ratio on briquette performance, specifically on HHV and combustion properties. Tamarind peel was processed into different powder sizes, mixed with varying binder ratios, and formed into briquettes. The three predictive models were statistically evaluated using R2, the Bayesian Information Criterion (BIC), and the Akaike Information Criterion (AIC) after the briquettes were proximally analysed. With an R2 of 0.96, the Wahid model showed the highest prediction accuracy, followed by Nhuchhen (0.93) and Kieseler (0.78), according to the data. Wahid's model also had the lowest AIC (45.3) and BIC (47.1), indicating it is the most efficient model for predicting the HHV of tamarind peel briquettes. According to the study, the best combinations for improved briquette performance were determined when particle size and binder ratio were found to have a substantial impact on the combustion characteristics. By turning leftover tamarind peel into a renewable energy source, this study promotes environmentally friendly waste management while also fostering energy innovation. The findings provide valuable insights into the optimization of biomass briquette production and highlight the potential of tamarind peel as an underutilized biomass resource.