12V Timer Switch - Programmable, DC/AC/Solar Battery Powered | 12 Volt JVR Timer Relay

Extremely useful, well designed timer. I use this to manage electrical devices in my solar-powered outhouse. at my weekend cabin in the woods. I use multiple schedules to manage the fan and motion-detector lighting differently on weekdays, Fridays, and weekends to enhance battery performance and to optimize composting.The internal rechargeable battery and the orange on-indicator light are particularly useful features. It is a solid device with a good four point panel mount. I like the timed locking feature because it prevents guests from accidentally reprogramming the timer or turning off automatic setting.The timer comes with four short wires with blade connectors. Longer wires, perhaps eight inches, would have been more useful, and I would not have needed to make up my own.Programming is convenient and not difficult, but it requires thought and attention to create a logical schedule without errors if you are making more than a few entries.

I have a couple of batteries hooked up to solar panels and 4 or 5 RV lights for my Chickens and Goat sheds and pens.Given how cheap this was, I'm shocked how well it works. I hooked it up, outside but under cover, to the lights in the chicken run. It turns on every morning at 5:30 and off at around 8 so the chickens have light in the morning, grey and rain here in Seattle.

When trying to setup the device, the MINUTE digit wouldn't display correctly. The Day and hour were correct. I just wasn't able to set a time for example to be 11:15. I am returning the product and have asked to have another one sent to me. I'll update this review when I receive it. One star so far.UPDATE: The replacement arrived the following day (haven't even sent the first one back yet ... good job, Amazon. It works fine. The programming works. It would be nice to be able to set the entire week, for the same ON/OFF schedule rather than repeating it 7 times. Still, a nice little device that does exactly what it is supposed to do. Updated to 4 stars.

I needed a simple timer to control the low voltage house number light fixture of my home. The light is powered by the doorbell transformer and was on constant. Setup, install, and programming was a snap. The timer has a useful red light indicating the "on" mode. The only negative is the programming does not allow overlapping programs, i.e, one program for winter hours and one for summer. It does allow on at 2 pm, off at 3 pm, then on at 4pm, etc.9

Could not get this to work properly. Screen too dim to see in the daytime.

i have a total of 3 of these. they work exactly as stated. they are reliable, handle DC or AC and timer is very reliable. does need a 12 volt source to power it. remote switching is what i needed. one was recently struck by lightning and it was blown apart, and it still works, even fragmented.now that is what i call quality. i'm definately keeping these on my remote projects as i found the one above still working with the cover blown off (that is the face) and the componants inside showing damge and it still worked.....tell me how that can be? i don't know, but it is still working

I have purchased over a dozen units over the past 5 years for work. I've had very few issues and continually buy more when the need arises.I've never had an issue with the current, with the largest application powering a large 50W Motorola radio repeater. My main application is to automatically cut power at the end of the workday to save solar-charged battery power.

I installed this timer on my RV to control some of the exterior 12 volt lights so I dont have to manually turn them on and off every night, and the lights will still turn on for nights I'm not at the rv.I'd say the quality of the product is about on par for chinese products manufactured soley for cost, rather than longevity or quality. Case in point, the device has an internal watch battery, which makes a lot of sense. Unfortunately the plastic housing will obviously be a nightmare to open and probably break the first time I need to replace the battery. There are a thousand ways that this could have been designed so that it lasts, but it isn't.As for functionality so far so good, but I only implemented last week. I don't have high expectations that the device will stand the test of time, I'm certain the components are of the cheapest quality.The device comes with instructions but they are subpar like most chinese products of this sort. They are in broken english, unclear - especailly when it comes to the quirky programming (again because of poor software/systems engineering), and far from complete. At least there was a simple elecrical diagram that made my implementation possible, but if I were doing something different, such as using 12v dc to control an ac circuit I'd be very unlear and worried about cooking things - either cooking the device or worse the fire department coming for a house bbq.Overall, the device works for my dc implementation for today. I'd absolutely prefer an American made product of much higher quality rather than "chinese garbage", but unfortunately these are the only products available for this type of application these days.