Wireless power transfer (WPT) technique presents a viable approach to extending the battery life of implantable medical electronics (IMEs), such as cardiac defibrillators, cochlear implants, pacemakers, etc. Battery depletion necessitates frequent IME battery replacements, placing a burden on the patient. To this end, WPT techniques can assist in improving the durability of IMEs. Utilizing a photovoltaic (PV) energy harvester in conjunction with an external light source offers advantages for WPT systems, providing sufficient power for IMEs. This paper presents a wireless electrical power system for IMEs. In this study, energy is delivered via a tissue-mimicking optical phantom. Commercially available monocrystalline silicon (Si) PV cells and a high-power 850 nm near-infrared (NIR) LED light were used as energy harvesters and to deliver optical power across the phantoms, respectively. This study considers the following parameters: the received optical power in the different thicknesses of phantoms (i.e., 10 mm, 40 mm, and 50 mm) under varying transmitted power conditions, the voltage output at open-circuit ( \({V}_{OC}\) ) and the short-circuit current ( \({I}_{SC}\) ) of the PV cells. The results show that PV cells can generate voltage in a reasonable harvesting time even when exposed to NIR light that has penetrated phantoms up to 50 mm thick. Moreover, the findings offer useful guidelines for developing future optical WPT (OWPT) systems and open a world of possibilities for future research. The potential for commercial monocrystalline Si PV cells to serve as energy harvesters to power various IMEs from external light sources, in this case, high-power 850 nm NIR light, is a fascinating area for further exploration.