NOVELTY - The solar cell module comprises a solar cell assembly comprising solar cells, a polymer encapsulant and metal components that comprise an oxidizable metal and are partially present in contact with the encapsulant. The polymer encapsulant comprises 15-45 wt.% of plasticizer, 0.3-2 wt.% of reducing agents, and 0.01-0.25 wt.% of adjuvants consisting of 0.1-2 wt.% of unsaturated heterocyclic compounds, 0.01-1 wt.% of UV absorbers, 0.01-1 wt.% of thermal stabilizers, 0.01-1 wt.% of hindered amine light stabilizers and 0.01-1 wt.% of chelating agents based on the total weight of the encapsulant.    USE - The solar cell module is useful to convert solar energy to electricity (claimed).    ADVANTAGE - The solar cell module has increased impact resistance and penetration resistance, improved UV light resistance and discoloration resistance, good long term thermal stability, adequate adhesion strength, enhanced moisture resistance and excellent long term weatherability, and protects the fragile solar cells.    DETAILED DESCRIPTION - The solar cell module comprises a solar cell assembly comprising solar cells, a polymer encapsulant and metal components that comprise an oxidizable metal and are partially present in contact with the encapsulant. The polymer encapsulant comprises 15-45 wt.% of plasticizer, 0.3-2 wt.% of reducing agents, and 0.01-0.25 wt.% of adjuvants consisting of 0.1-2 wt.% of unsaturated heterocyclic compounds, 0.01-1 wt.% of UV absorbers, 0.01-1 wt.% of thermal stabilizers, 0.01-1 wt.% of hindered amine light stabilizers and 0.01-1 wt.% of chelating agents based on the total weight of the encapsulant. The oxidizable metal is oxidizable under the operating conditions of the solar cell module, and is oxidizable when held under a bias of 1000 volts for 1000 hours at 85 degrees C and at 85% relative humidity in contact with the polymer encapsulant. The metal components consist of conductive pastes, connecting wires, conductive coatings and reflector films. The solar cells comprise wafer-based solar cells consisting of monocrystalline silicon and multi-crystalline silicon based solar cells. An INDEPENDENT CLAIM is included for a process for preventing discoloration of poly(vinylbutyral) encapsulant in a solar cell module.