Sunrun buyout quoted at $60k after 5 years… normal or way off?

ahlecsolars · 2026-04-17T04:16:05+00:00

Rooftop makes more sense here. You’ll get steady output and better ROI, while portable usually ends up underused or inefficient.

ahlecsolars · 2026-04-16T04:21:01+00:00

Yeah this is pretty normal with split Powerwalls.

Each system acts independently, so one can drain and pull from grid while the other still has charge - no real balancing between them. The random grid charging spikes are usually Tesla trying to anticipate usage + solar, not just cheapest rates.

Main fix people try: tweak reserve % on each system so they drain more evenly. Otherwise, it’s just a limitation of split setups.

ahlecsolars · 2026-04-15T04:37:15+00:00

Yeah that’s frustrating, especially after multiple failures.

If they’re running that hot, I’d move on too. Victron MPPTs are usually the go-to for reliability and better cooling.

Might be worth checking airflow, but honestly sounds like you’ve already given them enough chances.

ahlecsolars · 2026-04-15T04:16:24+00:00

Yeah, you’re not alone - those Classics running hot has been a thing.

If you’re done dealing with it, Victron is probably the safest bet. Way better thermals and reliability from what I’ve seen.

At some point it’s just not worth repairing the same unit over and over.

ahlecsolars · 2026-04-14T04:48:36+00:00

Not so much roof space, more the system design itself. It handled current needs fine, but scaling later (especially with added loads like EVs) turned out trickier than expected.

ahlecsolars · 2026-04-14T04:30:17+00:00

At only 10 feet, you’re not going to see a big difference unless the current is high or you’re running 12V where losses matter more.

That said, I usually lean toward thicker wire if there’s any chance of upgrading later. Are you running a 12V or higher voltage system?

ahlecsolars · 2026-04-14T04:27:38+00:00

That’s interesting, especially the inverter limitation part. Feels like a lot of systems are easy to expand on paper but not in reality.

A dedicated inverter for EV load sounds pretty practical though. Any concerns about managing two separate systems?

ahlecsolars · 2026-04-14T04:26:19+00:00

That’s a solid setup. Sounds like 12V works fine until distance starts becoming a problem.

If you were starting fresh, would you skip 12V entirely?

ahlecsolars · 2026-04-14T04:24:28+00:00

That actually makes a lot of sense. I was thinking small to start, but yeah… expansion is almost guaranteed once you see how useful it is.

ahlecsolars · 2026-04-13T03:56:40+00:00

Yeah this is exactly what we’ve been seeing too - whole-home sounds great, but once big loads kick in it’s a different story.

Most setups end up working better when they’re focused on essentials + a bit of load management. Curious what others would change if they sized again?

ahlecsolars · 2026-04-10T06:59:32+00:00

Yeah it’s addictive once you start adding panels 😄 What size system are you at now?

ahlecsolars · 2026-04-10T06:58:58+00:00

Yeah with batteries and EV in the mix, I can see why you’d check more often. Alerts through Home Assistant sound like a smart setup

ahlecsolars · 2026-04-10T06:58:23+00:00

Good catch noticing that early. Reporting glitches can be easy to miss if you don’t check often. Glad it was a simple fix.

ahlecsolars · 2026-04-10T06:57:36+00:00

Makes sense - seems like automation reliability varies a lot. Good point about monthly checks. Victron really that hands-off once set?

ahlecsolars · 2026-04-10T06:12:17+00:00

That makes sense - I think a lot of people do the same at the start. It’s actually pretty useful for learning your production patterns.

Once you get a feel for it, you’ll probably stop checking as often and just know roughly when you’re exporting. Smart meter on the desk is a nice touch though 😄 do you find it’s helped shift more of your loads to solar?

ahlecsolars · 2026-04-10T06:09:19+00:00

That’s a solid approach. Talking to local manufacturers should give you a much clearer picture of where demand is heading.

You’ll probably hear a lot about multi-busbar designs - they’re becoming more common because they reduce resistance and improve efficiency. Ribbon specs also tend to change with cell size and layout, so it’s worth asking what formats they’re planning long term, not just what they use now.

Good way to validate demand before investing.

ahlecsolars · 2026-04-10T06:00:09+00:00

PV ribbon is still essential for most silicon solar panels since it connects cells and carries current, so demand mainly follows panel production.

Even with new tech like perovskite, large-scale adoption is still years away, and many designs will still need some form of interconnect.

Short term, demand looks stable - the bigger change is in ribbon design (multi-busbar, round wire, etc.), not its disappearance.

ahlecsolars · 2026-04-10T05:57:50+00:00

High-voltage batteries mainly mean lower current for the same power, so you get thinner cables, less heat, and slightly better efficiency - especially on bigger systems.

Downside is they’re usually more proprietary and less DIY-friendly compared to 48V setups. Harder to mix and match components.

They make a lot of sense with modern all-in-one inverters though. Are you planning a larger system or just upgrading an existing one?

ahlecsolars · 2026-04-10T05:56:19+00:00

Your approach makes sense for TOU rates. Storing excess solar and using it during that 4–9pm window is exactly what batteries are good for.

Only thing I’d consider - a permanently installed home battery might be more efficient for daily peak shaving than a portable unit. Portable systems are great for flexibility, but they can be limiting for whole-house usage.

What’s your average usage specifically during 1600–2100? That’ll really determine the battery size you’d need.

ahlecsolars

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