You will always want to use a golf cart cover if you are storing your golf cart inside or outside. This is because a golf cart that is being stored indoors can get dusty and dirty. This could cause the golf cart to not run at its full potential due to dirt entering the engine.
If your golf cart sits outdoors, you will want to have it covered to protect the cart from dirt, dust, and the weather. A perfect way to ruin a good golf cart is to let it sit outside unprotected from the wind, rain and snow. By simply having a cover over it, you will have it ready to go for next season. Purchasing a golf cart cover is definitely cheaper than purchasing a new golf cart.