The "who pays for it aside," do not get the "L." Even if you have to pay for the upgrade. Jim has already mentioned the two main drawbacks, the allowed schedules and the load center. I hate looking at the external circuit breaker box, but I can live with that because once I walk away from the pad, it's out of mind.
But the scheduling is a huge deal, for me. I got the same spiel: you just have a pool, no spa, so what are you going to program? Well:
1. filter mode
2. cleaner mode
3. pool light
4. skimmer mode (a high-speed version of filter mode, that can clear the floating leaves quickly)
That's it for the lite version. And maybe you're thinking, well, that's enough. Not.
The ETs have two very cool additional scheduling features:
- A one time schedule, like if you want the light to go a little later for a party, but don't want to mess with the normal schedule.
- And egg timers. So say you notice some leaves floating around just before guests arrive. So you manually invoke "skimmer mode" to polish the surface, and the egg timer schedule knows to shut off the high speed skimmer function 30 minutes later. Set it and forget it!
Here's the rub. All those count against the measly four allowed schedules. So if you fill your schedules like above, 1-4, you can't use egg timers, and vice versa! I don't use the one-time scheduling much at all, so I'm not sure they count against the four. I could check, but I bet they do.
And how I'd really like to be able to run my pool if I wanted to:
1. filter mode egg time
2. cleaner mode egg time
3. pool light egg time
4. skimmer mode egg time
and then the regular schedules:
5. filter mode
6. cleaner mode
7. pool light
8. skimmer mode
and then if that didn't adequately clean my pool, I'd like the option of adding more:
9. split the filter mode into two times a day (morning and night)
10. a second vacuuming session during leaf-dropping season
11. a second skimmer mode, so one in the morning, one in the afternoon and
12. a third skimmer mode, another in the late afternoon
Boom, 12 right off the bat. Don't stop me now!!
I'm not even explaining what I'd like to be able to do with my solar heater!! I could probably use four more!
I actually have the SPA version, which I make great use of even though I don't have a spa.
The ET can automate different SWG outputs for pool and spa. I don't have a spa, but the ET doesn't know that. So I'll have 7 hours of filter mode, with SWG, that's what my pool needs chlorine-wise. But the solar heater is a complete wild card based on weather and if I'm even home. So I set up a SPA mode, with SWG output of zero, which I can turn on manually. So come 3:00PM and my filtering is done, and my SWG has delivered all the chlorine I need, I can engage SPA mode, which will then continue solar heating, but with no extra SWG runtime. Otherwise, if I wanted extra heat that day, I'd also end up with extra chlorine. (There's now an IntellipH in the mix that makes that ability even more important.)
And I'd love to be able to program that SPA mode thoughout the week. And even have an egg timer for it, so I could just push a button, get extra heat that afternoon (for my late night swim-a-go-go) and know that it'll shut down three hours later without me thinking about it. But nope, I only get four schedules.
So I make do, but I have all this great convenience equipment that I can't use fully because of my ET lite. I curse my PB all the time!! He (and yours) are thinking in terms of filter, maybe cleaner, light. That's it. But I paid a lot of money for automation. I want to automate!!
Think about what you might want to program, how many schedules you might need, then double that number!! (Or at least 150%). I didn't even get into running landscape lighting, water features, fountain pump, bistro lights, etc, etc.
I'm guessing an ET4 would have a very discounted resale value. A 4L would be way less, unless you're willing to pass along that unfortunate junk to a stranger. Point being, if you buy too small, you're going to be stuck buying a new one and recouping little from the mistake.
If I had it to do again, I get the ET8, with SWG and power center and spa mode, too (not sure they even come without that). And I'd probably max that out...