- Storage tank size is a big one—ran into that myself with a 120L tank for a rental, which just wasn’t enough for a family of four in winter.
- Hard water buildup can really sneak up on you. I’ve started putting in a flush schedule for tenants, but it’s hit or miss if they actually do it.
- Shade’s a silent killer for these systems. Had a neighbor put up a pergola and suddenly my collector output dropped by half—took me weeks to figure out why.
- Electric boosters are a solid backup, but I’d double-check your collector angle and any new shade before investing more. Sometimes just trimming a tree does the trick.
Collector angle really does make a difference, especially in winter. I thought mine was fine until I actually measured it—turns out it was off by about 10 degrees. After tweaking it, I got noticeably more hot water, even without bumping up the booster. Shade’s tricky though; sometimes it’s just a neighbor’s new plant that throws everything off. You’re right about the tank size too—120L just isn’t enough for a busy household. It’s wild how all these little things add up.
Funny you mention the collector angle—I had the same issue last year. I’d always assumed “close enough” was fine, but after actually checking with a digital angle finder, I realized mine was off by about 7 degrees. It’s wild how much difference a small adjustment can make, especially in the colder months when every bit of sunlight counts.
I’m with you on the tank size too. We’ve got a 150L tank for four people, and even that sometimes feels tight if everyone’s home. I’ve been wondering if insulation on the pipes or the tank itself might help keep the water hotter for longer, especially overnight. Has anyone tried adding extra insulation or maybe even a thermal blanket to their tank? I’m a bit cautious about messing with anything electrical or plumbing-related, but I’ve heard it can make a noticeable difference if done right.
One thing I’m always careful about is making sure nothing’s blocking the collector—leaves, bird droppings, even dust can build up over time. I try to check it every couple of months, but I’m curious if anyone’s found a good way to keep the panels clean without having to climb up there too often.
- I get the temptation to add more insulation, but honestly, I didn’t notice much of a payoff when I tried a thermal blanket on our tank last winter. The pipes were another story—insulating those actually seemed to help, especially the ones running through the garage.
- About panel cleaning, I’ve found that rain does a halfway decent job most months. Unless you’re in a super dusty spot, climbing up there more than twice a year might be overkill.
- For tank size, have you considered shifting showers to spread out hot water demand? We started doing that and it helped more than I expected.
I tried spacing out showers too, but mornings are still a rush at my place. One thing that helped was turning down the flow rate on the showerhead—less water used means the hot lasts longer. Also, I wrapped the pipes last weekend, and it actually made a difference, especially on cold mornings. Maybe not a game-changer, but every bit helps.
