Running through the numbers to see if home battery storage is viable on my home.
And comparing Tesla Powerwall, Enphase IQ Battery, BYD LVS, and Greenbank battery pricing.

00:00 – Is Home Battery Storage Financially Viable?
00:45 – Energy consumption & production numbers
03:25 – What about hot water?
04:30 – Am I 100% grid-independent?
05:18 – How much does electricity cost?
06:10 – What size battery and what budget?
07:07 – 5 year or 10 year payback?
07:35 – What size battery?
08:34 – Battery storage price comparison.
10:01 – AC Battery. Tesla, Enphase.
10:40 – DC battery hybrid inverter storage
12:26 – Do I get blackouts in Sydney?
12:54 – DYD LVS battery
13:19 – CHEAP Greenbank battery
14:25 – Does a cheap battery pay for itself?
15:11 – Feeding Enphase microinverters into a Hybrid inverter?
17:17 – Longevity, Maintenance, Peak power, and depth of discharge all determine battery life.
18:44 – Conclusion

https://www.eevblog.com/forum/blog/eevblog-1502-is-home-battery-storage-financially-viable/

Not everybody has $6500 to toss into a Tesla Powerwall (and that’s a low estimate), but if you want the benefits of battery storage for your house, [Matt]’s modular “microbattery” storage system might be right up your alley. With a build-as-you-go model, virtually any battery can be placed on the grid in order to start storing power from a small solar installation or other power source.

Networked home battery
Choose your battery tech, microinverter tech and network some home batteries to power your house.
https://hackaday.io/project/170506-networked-home-battery

Comments:

not a $1 anymore more like $1099.99.

For info, brass is an alloy of copper and zinc. It’s electrical conductivity is about 28% that of copper. That means for a given current (Amps) and length the brass needs to have about 3.5 X the cross sectional area!

Your battery systems are very interesting, but when you have high currents through brass you will lose quite a bit of energy through heat unless you take into account the need for a far greater size of conductor using brass.

I can see that brass rod is very easy to source (easier than copper rod) but remember that you need to scale up the cross sectional area in relation to copper.

This is important because if you are going to the trouble of collecting electricity, storing it, recovering it then converting it to AC, every inefficiency means you need more solar collection and more battery storage.

“Politician” and “maker” are two words that are rarely used to describe the same person. But, in the case of Thomas Massie, Republican representative for Kentucky’s 4th congressional district and MIT graduate, those are apt descriptions. In a series of tweets yesterday and YouTube videos over the past year, he proved that with a demonstration of a DIY Powerwall he built from a Tesla Model S battery pack.

https://youtu.be/qpPYkqpe-Ms

$300 DIY Tesla Powerwall – Solar storage 18650 lithium ion home Battery
https://www.youtube.com/watch?v=Bk50IuWXg-c

Elon Musk isn’t just the greatest human being — he’s also a great inventor. He’s invented the reusable rocket, the electric car, and so much more. While those are fantastic achievements, Elon’s greatest invention is probably the PowerWall. The idea of a PowerWall is simple and has been around for years: just get a bunch of batteries and build a giant UPS for your house. Elon brought it to the forefront, though, and DIYers around the world are building their own. Thanks, Elon.

Of course, while the idea of building your own PowerWall is simple, the devil is in the details. How are you going to buy all those batteries? How are you going to connect them together? How do you connect it to your fuse box? It’s a systems integration nightmare, made even more difficult by the fact that lithium cells can catch fire if you do something wrong. [jehugarcia] is building his own PowerWall, and he might have hit upon an interesting solution. He’s built a modular system to store and charge hundreds of 18650 cells. It looks great, and this might be the answer to anyone wanting to build their own PowerWall.

https://www.youtube.com/watch?v=9YwErplHps8

In 2015, Tesla announced their Powerwall power storage system. While the Powerwall didn’t generate the kind of excitement that Tesla cars have, the idea is actually very good. Essentially, it’s a huge battery pack designed for homes. If you rely heavily on solar power, it can store that electricity to get you through the night.

Unfortunately, you just can’t get a new Powerwall right now, but you can follow Jehu Garcia’s lead and build your own.

As you’d imagine, most of the money and labor for a project like this goes into the batteries themselves.

The cheapest way to build a large rechargeable battery pack is to combine hundreds — or even thousands — of small 18650 lithium-ion batteries. Those can be purchased for less than $1 each

https://hackaday.com/2018/08/11/the-quick-build-powerwall/

Do-it-yourself electricity generation is still difficult and expensive. The inventors of the SunZilla project aim to make it easier, cleaner, portable, quiet, and completely open source.

The SunZilla system is designed to replace diesel and gasoline-powered generators for portable and emergency power: camping, events, mobile phone charging station, provide power to refugee camps, or keep the lights on during a power outage. Two people can set it up in a few minutes. It is modular and plug-and-play.

http://sunzilla.de/