Remote labs have gained popularity for their flexibility, accessibility, and cost-effectiveness. They come in two main types: real-time remote labs, where learners operate equipment remotely, mimicking in-person experiences, and ultra-concurrent labs, which use pre-recorded experiments to support multiple users simultaneously. While real-time labs provide hands-on interaction, they face challenges like scheduling conflicts and environmental dependencies, which ultra-concurrent labs overcome by removing logistical barriers. This paper introduces a web-based ultra-concurrent remote lab builder platform that aims turn real-time remote labs into ultra-concurrent remote labs. Our goal is to attenuate the limitations associated with real-time lab access, especially for long or condition-dependent experiments. We also present a case study focused on an existing real-time Photovoltaic (PV) Solar Remote Lab, which faced challenges when used in real-world settings, due to weather dependencies, long running experiments, and high student demand. The lab was turned into an ultra-concurrent version, enabling learners to study photovoltaic efficiency across different altitudes and conditions without requiring real-time access. The proposed platform effectively addresses limitations in existing remote lab models by providing a user-friendly solution for creating ultra-concurrent labs.