Intermatic ET8215C Astronomic Electronic Time Switch - Automated Weekly Scheduling, Multi-Volt Operation, To-the-Minute Programming - Astronomic Feature for Intelligent Lighting

Has worked great for many years. Has automatic Daylight Saving mode. Batteries keep it programmed during power outages.

We use this at our church to operate the parking lot lights. Can be programmed for different times daily. Programming can be a little challenging.

Overall, I am very happy with the purchase. The timer had everything needed for installing it. Installation was not problematic for electrician. Setting was ok too, after carefully reading the instructions. I recommend this product and I would purchase again.

The unit works great and was programmed to come on at dusk and off at a set time. The programming was a bit tricky, but only took a few cycles through the menus to figure it out. The instructions for wiring were less than clear and did not reflect the proper wiring method for the desired loads and switch settings. After making my own jumpers, the box worked great.

Best design of an electronic timer. Never have to reset the timer with the time change as it automatically changes by itself. After entering the date, time, and location, the timer has the time of sun rise and sun set programmed in its memory, so you don't have to keep changing the time every few months. Intermatic is a heavy-duty timer with NEMA 1 and NEMA 3R boxes to choose from. I only wish they offered two AAA lithium batteries for memory battery backup. I always install energizer lithium for areas prone to power outages, so the timer keeps its date and time.

This is the second of this product bought to replace some "dumb" timer switches used at our church. We now have the flexibility to have the outside lights on at the unique times our church schedule requires. Especially like the fact that it tracks sunset and sunrise times as well as changes in daylight savings time. We now have the lights coming on when needed, and not coming on in broad daylight because of changes in time or the variation in sunset and sunrise times during the year. Further, the battery back-up avoids the hassle of having to reset the timer switch after power outages. This is such a great improvement over our old "dumb" timer switches. This device was fairly easy to program.

I have been using the product for several years now and they work as advertised. Very reliable.

The wiring diagram for this thing is awful. I work professionally as an engineer and I'm accustomed to looking at diagrams all the time. There are a number of different ways you can interpret their poorly designed diagrams.In my situation I was running two 30 AMP 120V circuits to the device. This is a simple setup, and I bought this model specifically because it was advertised as 2XSPST. A few important notes:Disclaimer: For informational purposes only, I'm not a licensed electrician and don't warrant the accuracy of the following:1)Timer power has nothing to do with the delivery of power to the device on the opposite side of the timer. When you bring your feeds in, wire it up, but understand it's independent of everything else.2)If you're in a 2xSPST configuration(120v), 3 and 5 are for your incoming(line) hot wire(3 is hot from your first circuit, 5 is hot from your second circuit). 4 and 6 are for your outgoing(load) HOT wires(4 is fed from your first circuit, 5 is fed from your second circuit). Wire the neutral for your first circuit (whose hot is in 3), to the neutral for feed one(whose hot is 4). Repeat for the second circuit. Wire the grounds the same way. In my case each feed was 30Amps on the main panel, and fed separate small sub panels that would be switched on by the timer.I would have rated this higher, but I'm disappointed in the instructions. Also, if you're running two 30AMP circuits into the timer, you're using 10 gauge wire. There isn't a whole lot of space in the timer box for two lines coming in and two loads going out(12 10 gauge wires total).