Most electiecians will tell you to go with the old analog timers. I've used them for 9 years - Only one failed due to me frying it with too much of a load. When I first began using them I was running 3K... Presently running up to 9K...
These run forever and are probably the easiest timers to set for 24 hour periods...
I don't know what the exact over amount of wattage it was that made this timer melt down... It was $150.00 eight years ago... I saved money on the replacement by using the old box but the price has gone up a fair amount.
Going this route helped clean up the room of excess extension cords, etc.
Recently this box was added so the timer can now handle up to 80 amps.
Got me??? Just happen to know a very cool electrician who owns his own business. He's super careful when working during flowering. Last grow the work had to be done one week before chopping. I couldn't believe there wasn't any plant damage putting that and two more outlet boxes down the line and into the mother room.