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#51 2020-02-15 16:00:27

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,099

Re: Home Solar System to Achieve Energy Usage Offset

More kits of other sizes are here
https://www.gogreensolar.com/collection … panel-kits

https://www.freecleansolar.com/10kW-Sol … -s/153.htm

For the other post the cost of the istalled is high as the actual unit to place is about half of that figure.

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#52 2020-11-11 10:04:11

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,099

Re: Home Solar System to Achieve Energy Usage Offset

How is the experiment of power cost offset going. Not every location is ideal for its usage
Mother-earth-news-residential-solar-3-jpg.jpg?h=320&w=550&la=en&hash=51AB93E036C6076D90C6681E5A93E6DC341E9B43

Of course there is also the exposure levels
solar-annual-ghi-2018-usa-scale-01.jpg

Which if you are in the lighter color means more panels are required to get to the much needed power levels that one might be using.

A couple of short articles on Going Off-Grid with Solar, Part 1: What Does it Mean and How Much Will it Cost? and Going Off-Grid with Solar, Part 2: Two Real-World Examples of Off-Grid Costs

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#53 2020-11-11 10:35:07

kbd512
Administrator
Registered: 2015-01-02
Posts: 4,615

Re: Home Solar System to Achieve Energy Usage Offset

SpaceNut,

Quick Update on Home Solar System:

Now that we've settled into our new house, we're getting a solar setup for 100% offset, along with a pair of Tesla PowerWall devices.  They installed the grid-tie yesterday, they'll be along to install the PowerWalls by the end of this week or next, and then they'll install the solar panels after that.

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#54 2020-11-11 14:08:19

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,099

Re: Home Solar System to Achieve Energy Usage Offset

Wow that does sound fantastic in what you are making use of keep us posted on the level of success and performance levels

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#55 2020-12-22 21:08:48

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,099

Re: Home Solar System to Achieve Energy Usage Offset

I have been running numbers for my home usage of daily need of less than 30kwhr year round average with the winter months climbing toward 45kwhr and during the summer back down towards 15kwhr.

Under low end use thats at 625 whr and at average 1.25kwhr and at the max its  1.875kwhr. with any invertor needing to have that power level as a mid for its capability to run continuously. So a 3,000 watt will work but to have margin for surge we would want to be closer to 4,000 watts.

Battery pack voltage is the next issue for the inverter as the higher the amps are to create that power the larger the wire guage needs to be and its got to be short runs or you have power faulting as the load goes up. Also if battery voltage is say 12v the more batteries you will need to have to provide that power continuously from a solar array source due to the hours that it is charging them.

This is also why many are going with the net metering.

AC power is half the voltage times the current to find the currents which will be needed from the batteries to supply the inverter with no conversion loss as wattage in is close to the wattage out.

Of course using a continous flow water generator is what we would all want to keep the need for size mismatching.

This is where we get into the backup storage and other options for saving energy that we do not need....

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#56 2020-12-29 14:40:08

kbd512
Administrator
Registered: 2015-01-02
Posts: 4,615

Re: Home Solar System to Achieve Energy Usage Offset

SpaceNut,

Quick Update on Home Solar System:

After much delay, our home solar system is nearly complete.  About half of the panels are on the roof, as of today.  The PowerWalls are onsite and being installed as well.  They're supposed to complete the job by the end of tomorrow.

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#57 2020-12-29 16:26:38

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,099

Re: Home Solar System to Achieve Energy Usage Offset

That sounds fantastic....

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#58 2020-12-29 18:03:17

kbd512
Administrator
Registered: 2015-01-02
Posts: 4,615

Re: Home Solar System to Achieve Energy Usage Offset

SpaceNut,

It's official.  All 67 panels are installed, as well as the 2 Tesla PowerWalls.  A couple of guys are coming back tomorrow to do some additional wiring or configuration work on the batteries, but all equipment is now in place.  It should be approved / commissioned by the power company in another couple of weeks or so.

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#59 2020-12-29 20:04:44

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,099

Re: Home Solar System to Achieve Energy Usage Offset

Looking forward to learning more about your system as time provides.
https://www.tesla.com/support/energy/po … tem-design

powerwall-system-design-comparison.jpg

https://southern-energy.com/guide-to-tesla-powerwall/

How many Powerwalls do I need?
We’re seriously not trying to dodge this question, but it really is different on a site-to-site basis and from a personal preference. 70% of our customers buy more than one Powerwall. For most systems, we install 2 or 3 powerwalls. The total number is a personal choice depending on how much power you want or need to store and what types of devices you hope to switch on during a grid outage.

https://www.tesla.com/powerwall

https://cleantechnica.com/2020/10/05/te … ge-prices/

https://dgit.com/tesla-powerwall-specs- … ery-51137/

Tesla Powerwall 2 price
This is the biggest issue facing Powerwall right now. One 14kWh battery, complete with an integrated inverter, costs $5,500. The associated hardware is $700 and the installation generally costs $800-$2,000, potentially bringing the total Tesla Powerwall price to over $8000.

A 3-bedroom house sucks up approximately 30kWh of power per day, so as things stand you’d need two of them at least to power a normal home and recharge at night.

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#60 2021-03-25 19:14:59

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,099

Re: Home Solar System to Achieve Energy Usage Offset

Found video of the wall being reconstructed

https://youtu.be/M1_qY5ta54g

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#61 2021-03-26 18:54:23

kbd512
Administrator
Registered: 2015-01-02
Posts: 4,615

Re: Home Solar System to Achieve Energy Usage Offset

SpaceNut,

We're still waiting on the power company to give their blessing on the system so we can connect it to the grid and start using it.  There were some placards and stickers missing, so the installer came out a few days ago, to apply the missing warning labels.  Hopefully we get it approved in the next few weeks here.  The power company has been a bit busy after the winter storm.  We're probably pretty low on their list of priorities right now.

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#62 2021-04-14 20:12:02

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,099

Re: Home Solar System to Achieve Energy Usage Offset

This is not the way to get people to buy into investing when you Tesla is hiking the prices on its solar roof tiles for existing customers by as much as 70%

ouch....

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#63 2021-07-11 06:29:03

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,099

Re: Home Solar System to Achieve Energy Usage Offset

repost details

SpaceNut wrote:

Right now the solar power complete kits of panels, batteries, inverters are running about a $1.50 a watt for these chinese system such as the 4KW 48V 20-Panel Off Grid Solar System with 195W Mono Solar Panel of would just barely power my home if its sunny every day as that is just 12 kw hrs of possible power from them. If we get every other day sunny then you need to double the system and if its only 1 in 3 days you need one more....
Of course this is an off grid system meaning no power company back up....plus it would cost more if you have this done for you rather than do it yourself as the kit above is for.
Also you need to jump through the state and town regulations for the install which can as well increase install as well as cause taxation for having them.

which has added to deregulation topic opening

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#64 2021-07-11 06:30:18

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,099

Re: Home Solar System to Achieve Energy Usage Offset

repost

kbd512 wrote:

SpaceNut,

I'm running solar right now and lots of it, with a pair of Tesla PowerWalls, yet the entire system (~$65K installed cost, IIRC) is insufficient to power a single AC unit in our home, for any period of time.  If we had to do that, we'd need a lot more panels- more than would fit on our roof, despite the size of our house.  It's a grid-tie system and the net effect, over the period of a year, is to basically cancel out our rather considerable electric power bill.  We installed the system to make our power bill the same every single month, meaning $367/month, every month.  The alternative was wild fluctuations between $200 to $1,500 per month.  The interior space is about 6,500ft^2 (5,500ft^2 on the first two floors), it has 3 AC units (one for each floor), and a pool (the pumps love those electrons, and eat them like candy).  Beyond that, what our home solar system does accomplish is to "chop the peak off the demand curve", so that the power company has a stable, meaning not wildly fluctuating throughout the day, amount of power that they need to supply to the grid.

If everybody could afford to do the same thing and it was practical for them to do it, then this would make supplying power to the grid an easier task.  That said, I don't imagine that every person in America can afford a $65K+ grid-tie home solar system.  I wouldn't demand public money from everyone at gunpoint, which is essentially what the "Green New Deal" simpletons want, to try and make every power generating solution a solar panel or wind turbine and every power storage solution a battery.  It doesn't matter what they want if simple physics won't allow it to work.  I didn't set the rules about how this universe works to shatter their "green dreams".  It's always worked the way it's always worked, and I don't know of anyone who knows how to change that.

We don't need more intermittent power at a grid level.  What we do need is stable CO2-minimized base load power that uses real hardware, not notional hardware that might be available 20 / 30 / 50 years into the future.  For cities in America, that means a new generation of small modular nuclear reactors that use abundant and cheap Thorium fuel and a non-water-based thermal power transfer cycle.  We can put them wherever they're least likely to be damaged by flooding or earthquakes.  If that means they build one in my backyard, so be it.  I understand how the technology works, how and why it fails, and I'm not afraid of it.

We can either accept that there's no such thing as affordable grid level storage of any description, so there's no such thing as a practical 100% wind and solar energy solution, or we can continue to deal in fantasies while accomplishing nothing worthwhile, as it relates to divesting ourselves from fossil fuels in a responsible and affordable way.  We've experimented ourselves to death already.  Power generation still beats power storage every day of the week.  That was true 50 years ago, it's true now, and in all probability it'll still be true 50 years from now.  If something radically changes 50 years from now, then we can stop using nuclear power.  Until then, we should move forward with solutions that actually work, irrespective of the issues some people have with technological reality.  We need a return to pragmatism.  If we can't do that, then our problems will continue to get worse.

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#65 2021-07-11 06:31:16

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,099

Re: Home Solar System to Achieve Energy Usage Offset

Well I knew that power in Texas was expensive after the grid failure but  thats even more than I have seen ever except for the all electrical home...

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#66 2021-07-11 06:46:31

NewMarsMember
Member
Registered: 2019-02-17
Posts: 233

Re: Home Solar System to Achieve Energy Usage Offset

For kbd512 re Post #64 (repost) ....

For SpaceNut ... thanks for collecting these items for the topic!

I'm picking up on your hint about accepting a Thorium plant in your backyard.

I would like to start this with a question that might be for Calliban as well ...

Is it feasible for a home owner to have a thorium (or similar) reactor in a sub-sub-basement right now?

I know (from reports on the Internet in recent times) that work is progressing on multiple fronts to provide steady, reliable, low-risk, modest power output systems using fission.  I'm not aware of any of the initiatives that have reached a stage where they could be deployed, but I get the impression teams around the world are working furiously to try to reach that objective.

Ok ... that was the opener ...

Now for the entree !!!  if a manufacturer ** had ** such a system, and if it could be deployed as described (sub-sub-basement), would your political situation permit it?

I would be doubtful in any State but Texas .... (perhaps Alaska) ... but !!! you ** are ** in Texas.

What do you think?

Would you accept a system, and would your community go along with the idea?

It could become a model for self-generation at every home in the US.

For nervous nellies ... the systems are talking about are not suitable for weapons production.

(th)


Recruiting High Value members for NewMars.com/forums, in association with the Mars Society

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#67 2021-07-11 06:55:45

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,099

Re: Home Solar System to Achieve Energy Usage Offset

that was in kbd512's post but all of the reactors labeled small are in megawatt output size which is a neighborhood design..

With lots of granite and it mostly being the bedrock under our homes we have the out gassing of radon to contend with so a little more radioactivity would not be seen as a problem for a residential unit but as a neighborhood units that to much....

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#68 2021-07-18 21:21:30

Void
Member
Registered: 2011-12-29
Posts: 3,884

Re: Home Solar System to Achieve Energy Usage Offset

Tesla, not just cars.
https://www.bing.com/videos/search?q=te … &FORM=VIRE
I think this is really good. 

I think the key here may be multi-functions.

Car Batteries are part of the structure of the car.

Solar Panels are the roof, that you need anyway, and if I understand it correctly,
they can also de-ice themselves.

Car collections are a storage grid???  At least that is what I think.

I also like this as in the event of some social disruptions, some people will have some electric power.  This would make recovery much easier and probable.

Anyway they have me deeply interested to see what they eventually do.

Certainly a good system for some mid latitude locations such as parts or lots of
the USA.

I like it.

Done.


I like people who criticize angels dancing on a pinhead.  I also like it when angels dance on my pinhead.

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