<p>In order to quantify the impact of distributed photovoltaic (PV) access on the distribution network from multiple dimensions, including stability, economy, and low carbon, this paper proposes a novel comprehensive evaluation method for grid-connected rooftop PV systems. The method combines the fuzzy analytical hierarchy process (FAHP) for subjective weighting of primary indicators with the improved CRiteria importance through intercriteria correlation (CRITIC) method for objective weighting of secondary indicators. Unlike traditional evaluation methods that often rely solely on subjective or objective weighting, this combination effectively mitigates the biases inherent in single-method approaches. Additionally, we incorporate carbon trading and ancillary service income into the economic indicators, addressing the limitations of incompleteness of economic indicators and reflecting the evolving power market trends. Then, the technique for order preference by similarity to ideal solution-rank sum ratio (TOPSIS-RSR) method is employed to calculate the relative closeness of each evaluation index to ideal solutions, providing a robust ranking and qualitative assessment of different scenarios. Finally, two sets of comparative experiments and three PV access schemes were designed for case simulations. Comparative analyses verify that the proposed method not only offers a more accurate evaluation but also highlights the significant economic benefits of considering carbon trading and ancillary service, while shortening the project investment payback period. The comprehensive evaluation results can select a reasonable case by calculating the relative closeness to the positive ideal solution, thereby validating the evaluation accuracy of the proposed method.</p>