Very good video. I find that solar panels are so cheap that conversion loss is not an issue in my micro grid. Because the two houses are close together,ac coupling losses is not a big deal. I think the high voltage battery bank would be a good idea in a micro grid of ten or more houses on a city block where a centrally located battery bank and individual off grid inverters for each house is located. One grid connection could supply energy at off peak hours to maintain the battery. If this small community had EV chargers at the battery bank,the second car that most families have that is not normally used for long distances could absorb excess solar so there would be no need to dump energy on the grid at low price. I feel that this scenario is the inevitable evolution of distributed generation and storage. If I had stranded assets in grid power industry, I would be redirecting it to something with a brighter future.
Great video. You covered efficiency and cost(of wiring). Please do a video on safety and also the cost of the battery types and the cost of installation. There are battery types that are not lithium based. CATL has come out with a Na battery. Li is highly flammable and expensive vs. Na which is non-flammable and very inexpensive due to is abundance.
I've not seen any Na home batteries yet, have you? Sodium and Li are both very flammable in elemental/metal form. But there isn't any of that in either type of battery. The primary flammable thing in current batteries are the electrolytes, which isn't really an issue unless you get into a thermal runaway condition. Personally, I think LFP batteries are safe enough because they're much less prone to runaway, but I wouldn't want a large, traditional Li-ion battery inside my house.
@@TheUweRoss According to my background in science and also according to this excerpt by Cornell University:"Sodium-ion batteries are a promising technology for electric vehicles, the energy grid and other applications because they are made from abundant materials that are energy dense, nonflammable and operate well in colder temperatures.". Their flaw is longevity but that flaw is now being addressed by some battery manufacturers. See CALT for more information. At this point Na batteries have yet to get into mass production.
I would like to see a video of whole home battery backup without solar. Like if someone needs to wait on putting solar on their roof for any reason they could battery back their home until they are ready.
Had it for 25 years before I got solar. Used L16 size deep-cycle batteries and an old-school inverter/charger. Those were a bit of a pain though; they needed to have water added every few months and needed to be replaced every 6-8 years. It wasn't truly whole-home either, but critical loads, and of course I had a generator too. If I was going to do that these days, I'd probably get a Sol-Ark, which would make it very easy to add solar later, but I think the Enphase system I replaced it with would work just fine too. The problem with doing it w/o solar is you won't get the 30% tax credit, so you'd probably want to put in at least a few panels somewhere.
If you’re in Texas or some other place with “free at night “ grid power, it’s just a matter of battery KWH equal to your daily consumption and inverter capacity equal to your peak load to go on full battery backup. You put the inverter load priority on utility first ,then have a timer disconnect the grid during the non-free period. The more practical option is to size the battery for several days of critical load capacity. Since you are speaking of back up , you must have a grid connection and it’s just a matter of making temporary lifestyle changes until the grid comes back. The scenario ( whole home back up without solar) is what everyone with solar power experiences at night when the grid fails. The inverter depends on the battery exclusively until the grid returns or the sun comes up . Solar panels are so cheap that they should be installed to reduce the battery capacity requirement in the case of a multi day grid failure.
So my current solar system on my roof has 2 different systems. One has enphase inverters other has telsa inverters. Theres only a few batteries that can connect to both my systems. One system was done in 2017 the telsa was done last year. If i would followed you channel i would done it different live and learn. Wondering if this avalon can work on both my system.?
@@SolarSurge another solar channel was saying in a few months the powerwall 3 will have something new available to also be able to work with already installed solar system. Just didn't understand what he was saying. But his channel is very helpfull also. He runs a solar company in San Diego Ca.
I am disturbed that there were no actual numbers of efficiency losses in the video. Nevertheless, I would always go for AC coupling because I want decentralized points of failure. Using DC couple solar panels and batteries means there are, typically, one or two large inverters supplying lots of kilowatts. Those are points of failure. Whereas having mini inverters on each solar panel and on each battery bank requires just a cheap controller. Of which I would have a spare controller, or two sitting on a shelf, which I can plug-in at a moments notice.
It looks like this new Avalon system will be a good comparison with the Solaredge home system. Do you think you can do a comparison? Especially their batteries and level two EV chargers.
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Very Educational.. More power to your channel.. Watching from the Philippines 🇵🇭
Greetings from Texas!
On my off grid solar systems i do 48v at the panels directly to 48v batteries and 48v inverters.
Very wise design with minimal efficiency power loss.
Thanks for this useful information!
Very good video. I find that solar panels are so cheap that conversion loss is not an issue in my micro grid. Because the two houses are close together,ac coupling losses is not a big deal. I think the high voltage battery bank would be a good idea in a micro grid of ten or more houses on a city block where a centrally located battery bank and individual off grid inverters for each house is located. One grid connection could supply energy at off peak hours to maintain the battery. If this small community had EV chargers at the battery bank,the second car that most families have that is not normally used for long distances could absorb excess solar so there would be no need to dump energy on the grid at low price.
I feel that this scenario is the inevitable evolution of distributed generation and storage. If I had stranded assets in grid power industry, I would be redirecting it to something with a brighter future.
Great information
Great video. You covered efficiency and cost(of wiring). Please do a video on safety and also the cost of the battery types and the cost of installation. There are battery types that are not lithium based. CATL has come out with a Na battery. Li is highly flammable and expensive vs. Na which is non-flammable and very inexpensive due to is abundance.
I've not seen any Na home batteries yet, have you?
Sodium and Li are both very flammable in elemental/metal form. But there isn't any of that in either type of battery. The primary flammable thing in current batteries are the electrolytes, which isn't really an issue unless you get into a thermal runaway condition. Personally, I think LFP batteries are safe enough because they're much less prone to runaway, but I wouldn't want a large, traditional Li-ion battery inside my house.
@@TheUweRoss According to my background in science and also according to this excerpt by Cornell University:"Sodium-ion batteries are a promising technology for electric vehicles, the energy grid and other applications because they are made from abundant materials that are energy dense, nonflammable and operate well in colder temperatures.".
Their flaw is longevity but that flaw is now being addressed by some battery manufacturers. See CALT for more information.
At this point Na batteries have yet to get into mass production.
I would like to see a video of whole home battery backup without solar. Like if someone needs to wait on putting solar on their roof for any reason they could battery back their home until they are ready.
Had it for 25 years before I got solar. Used L16 size deep-cycle batteries and an old-school inverter/charger. Those were a bit of a pain though; they needed to have water added every few months and needed to be replaced every 6-8 years. It wasn't truly whole-home either, but critical loads, and of course I had a generator too. If I was going to do that these days, I'd probably get a Sol-Ark, which would make it very easy to add solar later, but I think the Enphase system I replaced it with would work just fine too. The problem with doing it w/o solar is you won't get the 30% tax credit, so you'd probably want to put in at least a few panels somewhere.
If you’re in Texas or some other place with “free at night “ grid power, it’s just a matter of battery KWH equal to your daily consumption and inverter capacity equal to your peak load to go on full battery backup. You put the inverter load priority on utility first ,then have a timer disconnect the grid during the non-free period.
The more practical option is to size the battery for several days of critical load capacity. Since you are speaking of back up , you must have a grid connection and it’s just a matter of making temporary lifestyle changes until the grid comes back.
The scenario ( whole home back up without solar) is what everyone with solar power experiences at night when the grid fails. The inverter depends on the battery exclusively until the grid returns or the sun comes up . Solar panels are so cheap that they should be installed to reduce the battery capacity requirement in the case of a multi day grid failure.
So my current solar system on my roof has 2 different systems. One has enphase inverters other has telsa inverters. Theres only a few batteries that can connect to both my systems. One system was done in 2017 the telsa was done last year. If i would followed you channel i would done it different live and learn. Wondering if this avalon can work on both my system.?
A large enough AC-coupled battery should work. Avalon (in AC mode), Franklin, or Tesla Powerwall IIs
@@SolarSurge another solar channel was saying in a few months the powerwall 3 will have something new available to also be able to work with already installed solar system. Just didn't understand what he was saying. But his channel is very helpfull also. He runs a solar company in San Diego Ca.
I am disturbed that there were no actual numbers of efficiency losses in the video. Nevertheless, I would always go for AC coupling because I want decentralized points of failure. Using DC couple solar panels and batteries means there are, typically, one or two large inverters supplying lots of kilowatts. Those are points of failure. Whereas having mini inverters on each solar panel and on each battery bank requires just a cheap controller. Of which I would have a spare controller, or two sitting on a shelf, which I can plug-in at a moments notice.
It looks like this new Avalon system will be a good comparison with the Solaredge home system. Do you think you can do a comparison? Especially their batteries and level two EV chargers.
Good observation. Avalon and SolarEdge Home use similar architectures.
Is Franklin or Avalon available as AC-High Voltage?
Both Franklin and Avalon support AC-coupling, which will be at the grid voltage of 240V.