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SS first line support is unqualified. timselectric has a lot more knowledge than SS first line support and 99% of the turnkey installers that might turn up to your house.

“Isolators don’t kill people. People kill people”

I think you are misunderstanding the voltage drop implications. It only matters for your efficiency and MPPT minimum activation voltage. The physics and EE police aren’t going to kick down your doors if you go to 4% loss, provided the voltage is above MPPT minimum. You could buy one DC DC...

Turnkey grid tie solar is so common in California, that nobody comments on how nice my one-person self-install looks. Other than the city inspector.

How would the shunt determine the solar that is unused because it cannot be used by loads nor absorbed by the battery?

Post spec sheet screenshots... They're going to be on the Santan website or wherever you are thinking of. Because there are an infinite number of possible used panels and we can't get anywhere efficiently until you paste that info in As well, to be polite and help with efficient answers paste...

It needs to be an approved UL9540 pair of inverter and battery combination. The battery positioning and protection within the structure is also prescribed in NEC or international residential code as adopted by your state (I think the latter). So that might be another rude awakening if inspector...

One thing I don’t see discussed much in the AIO vs components discussion is that components are shackled to 48V or lower DC rail voltage between the inverter and SCC. While high string voltage AIOs can internally use ~350VDC voltage between components. This can be more efficient because it...

I dunno about that. I consider every piece of equipment its own separate solar electric property. As long as it's new equipment (therefore no possibility of double dipping/taking infinite tax credits on the 30% by you and a previous owner on both hardware and install costs) it satisfies the...

How many of those problems are with Signature Solar and how many are directly with EG4? Because you don't have to buy it through Signature Solar. You could get it from Current Connected and one of the principals there is on the forum and very helpful. I think there is comparable forum knowledge...

Plenty of posts about this on the forum if you go looking... Personally I always like the installations with wireways + EMT into inverters and disconnects, over what you see in videos. This is a pretty reconfigurable, albeit expensive and timeconsuming to build in the first place, installation...

It’s the UL policy on how their trademarked/protected stickers can be applied. Either at manufacturer or at approved facility. If you Google for retroactive listing mark for other UL9540 products it’s not just a problem of EG4, there are manufacturers of batteries and cabinets that explicitly...

Man, something is wrong with the incentives on this forum. Folks with very well written project proposals and questions get lost because they didn’t post it in the right section or didn’t bother to repost it. Seen a couple one month old ones from time to time that got zero uptake. Meanwhile...

Note the DIY batteries may not be a good risk to take if the POCO starts policing for unsanctioned grid tie batteries. They would be detectable if run in parallel. If they only run an off grid panel then it is a lot harder (but they also may need custom programming to peak shave). You could do...

Oh I think I trust the people that build their own batteries more than making a stack of suspiciously cheap batteries. Although... if Amazon is willing to warehouse these batteries, it can't be that bad? ? Oops it ships from someone else, it's not Fulfilled By Amazon.

Which post talks about this? The AC on the frame is induced. There should not be any DC on the frame.

Bond to existing grounding system… I hope this doesn’t become another 10 page thread on the topic.

I believe the AHJ is looking for a UL or ETL listing stamp with control number matching the papers on EG4 website as to the UL9540 RU does not satisfy that. RU is not relevant for inspections.

Increasing my blood pressure because I bought one accidentally last year during a power outage.

I haven’t bought any EG4 but when I was considering it I got a very bad taste in my mouth with the company’s professionalism/level of caring with CEC and other California requirements. I don’t think anything EG4 has ever ended up on the list. Let’s compare this to Chinese manufacturers selling...

It’s actually a pair of Telecoms style “Rectifiers” (the jargon name for a charger in that corner of the engineering world) connected in parallel and using the same config input So it’s a one direction AC to DC thing. In case someone was tempted to try hacking one into an inverter, but got...

I’m not sure they’re DC rated either. Do you really want a 500V 10A DC arc two inches from your fingers when you pull it out? ?

Cheapest new grid tie string inverter is like $600. You can also use a $50 used Enphase microinverter, assuming your POCO/State allows pre 1741SA hardware on the grid. Switching DC is not easy to do safely. Well, for 100W/30VDC, it's easier than folks that ask about >100VDC strings. However to...

You can get multiple 6000XPs for one XW + all accessories. Enough for 1+1 active/spare or 2+1 active/spare or whatever. And I consider 6000XP (an off-grid AIO) as probably comparable to XW on the AC output and because XW is falling behind a bit on approved ESS combinations for grid tie...

That's exactly why nobody electrifying their home today or trying to use it off-grid would use one. On top of heat pump being >3x more efficient. (Tankless is great for a fossil fuel fired system)

Physics wise the same waste heat / power loss should be generated per unit length of conductor, modulo the positive thermal coefficient of resistance. However heat is not temperature. Temperature is related to how the heat is dissipated/not dissipated, and this definitely will not be symmetric...

New Math.

My house rules on White and Red are: don't flaunt it in the face of the inspector, and don't do it if it's something that will likely need regular maintenance (like, commercial/industrial or whatever). Things that need regular maintenance by a variety of people benefit a lot more from being sane...

Basically something that synchronizes phase and frequency with an incoming signal. A grid tie inverter needs to generate output at the same frequency as grid, but with a controlled phase and voltage difference to push different amounts of apparent power back into the grid.

This budget is not accurate. You can get a grid compliant inverter for $7-10k pre tax credit, equipment only. 12kW AC. I am shocked by the 21kW peak load though. OP deserves a demand charge for bursting that high… And buffering demand charges does not require a large system. It is more a...