Electric Vehicle with Solar Panel (EG6158K)

All electric shuttle bus models EG6088K, EG6118KA, EG6118KB and EG6158K can have solar panel on the tops. EG6088K and EG6118KA can only have one piece 185W solar panel, instead, EG6118KB and EG6158K can have two pieces 185W solar panel.
Solar panel has two advantages:
1. Increasing the range: if the sunshine is strong enough and the vehicle is put in the sunshine for 8 hours, around 8-10 kms range can be extended;
2. Maintain the batteries and increase the life span of batteries: because the solar panel will keep charging the batteries with small current whenever it's under the sunshine, it will keep maintain the batteries and increase the batteries' life span