Microbial biophotovoltaics (BPVs) are an emerging renewable energy technology that harnesses photosynthetic microorganisms to generate electric current. Despite the rapid growth of the field, the lack of standardized testing and reporting methods currently prevents the benchmarking of devices, slowing technological progress. This article provides a critical analysis of the experimental practices used in BPV research, highlighting the significant variability in device configurations, light sources, electrode materials, biomass quantification methods, and electrochemical measurement protocols reported in the literature. It further considers the historical standardization of protocols for conventional photovoltaics (PVs) and the resulting acceleration of the maturation and market adoption of PV technologies. Drawing inspiration from conventional PVs, the article outlines key steps toward BPV standardization, including defining common testing conditions, methods for data normalization, shared reference systems, and round-robin testing protocols. Establishing consensus in the testing protocols would significantly improve reproducibility and enable meaningful comparisons across laboratories, accelerating the development and deployment of BPVs.