Solar Panel Voltage Regulator

Can you operate low voltage landscape lights from a battery and Solar Panel?
Thinking of replacing the transformer with a 12 vdc 50 Ah battery charging via a regulator and 30 Watt Solar Panel. At most, maybe four 20 watt lights.
Thanks for the answers! The purpose is to temporarily put a few 20 watt low voltage spotlights out in remote areas of the yard to highlight small areas with pools of light without weaving a web of extension cords thru the yard. Mainly for Halloween and other yard events.
What do you want these landscape lights to do? If you want impact by lighting the front of the house or trail lights when walking down a path? What’s available now in solar doesn’t give off much light so what you will have is little blueish light that doesn’t give off much. So, if you need the light to focus on a particular place then I think solar would not be the best. Know what you want it to accomplish and take time to look at others lights. Your not going to get the same results from a battery or solar like you will get from the transformer.