Oilpan4
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Delivery Date: 10 May 2018
Leaf Number: 004270

Re: Share Your Home Electrification/Efficiency Improvements

Tue May 28, 2019 2:43 pm

I cut through lath and plaster, stucco, brick, concrete, my own blend of military grade ballistic concrete.

For lath and plaster I use a regular 120v powered drill and hole saw with brazed carbide teeth.
A standard hole saw can be used but it's going to be dull after a few holes.
So if you only have to cut one hole just ruin a regular cheap hole saw.
2011 white SL leaf with 2014 batt.
Chargers: Panasonic brick moded for 240v, duosida 16a 240v and a 10kw setec portable CHAdeMO
Location: 88103

LeftieBiker
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Location: Upstate New York, US

Re: Share Your Home Electrification/Efficiency Improvements

Tue May 28, 2019 3:12 pm

Oilpan4 wrote:I cut through lath and plaster, stucco, brick, concrete, my own blend of military grade ballistic concrete.

For lath and plaster I use a regular 120v powered drill and hole saw with brazed carbide teeth.
A standard hole saw can be used but it's going to be dull after a few holes.
So if you only have to cut one hole just ruin a regular cheap hole saw.
Everything I have read so far suggests that that will produce a huge amount of dust and that the lathe will vibrate and shake plaster loose. How do you avoid those issues?
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
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PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

iPlug
Posts: 411
Joined: Thu Apr 28, 2016 6:47 pm
Delivery Date: 25 Apr 2016
Location: Rocklin, CA

Re: Share Your Home Electrification/Efficiency Improvements

Tue May 28, 2019 7:23 pm

SageBrush wrote: My wife has come around to my opinion that it does not matter how cold it is at night under covers. In the morning she wants the air at least 55F until the sun comes out.
Sounds like you've made more progress in this arena on your end. Agree, ideally should be able to practically turn the heat off at night.

I've long been trying to nudge my wife along on with my eco/efficiency antics. I get less push back these days and have a better idea of how much I can pull, and seem to be slowly winning the long game on selling her on it.
SageBrush wrote:For the most part we only turn on the home heating on cloudy days. Our winter climate is ~ 15F nadir and - 50F peak with a lot of sunny days. It is perfect.
Nice that you have all those windows to work the greenhouse effect to your advantage. If we were to build a future home, that would be a real consideration for us. A bit tougher here though as winter is our rainy season so not so many sunny days at that time of year.
'19 Model 3 SR+ (own), '19 Leaf SV (leased), '12 Plug-in Prius (sold 3/19), '16 Leaf SV (prior lease), 11.43kW Solar PV (16MWh/yr real production), 20.5 SEER/13.0 HSPF ducted air-source heat pump, 3.70 UEF heat pump water heater, Induction Cooktop

Oilpan4
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Joined: Wed Jan 09, 2019 10:51 pm
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Re: Share Your Home Electrification/Efficiency Improvements

Wed May 29, 2019 7:45 am

I wear a dust mask maybe put down a canvas tarp. For the drill it needs to be a heavy duty high speed drill with side handle. I would use one of my dewalt drills that does 2,000 to 2,500 rpm at no load, go in full speed cut nice and slowly.
Clean up after with a shop vac setup for dust collection.
If you have idel hands you can have some one hold the shop vac and suck up the dust as its being made.
But be ware I have had 60lb chunks of plaster come down as soon as I have touched a lath and plaster ceiling. Don't trust it if it has water damage.
Last edited by Oilpan4 on Wed May 29, 2019 3:52 pm, edited 1 time in total.
2011 white SL leaf with 2014 batt.
Chargers: Panasonic brick moded for 240v, duosida 16a 240v and a 10kw setec portable CHAdeMO
Location: 88103

LeftieBiker
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Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Share Your Home Electrification/Efficiency Improvements

Wed May 29, 2019 1:03 pm

I think I'm going to cut through the window trim with my holesaw.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

iPlug
Posts: 411
Joined: Thu Apr 28, 2016 6:47 pm
Delivery Date: 25 Apr 2016
Location: Rocklin, CA

Re: Share Your Home Electrification/Efficiency Improvements

Sat Aug 03, 2019 3:20 pm

Bringing an update in from an unrelated thread where the update really should continue here.

In November 2017 we retired our 15 year old 50-gallon natural gas water heater and replaced it with a Rheem 65-gallon heat pump water heater. It has performed well since. We have a family of 4 and rarely multi-day guests bring house occupancy up to ~10 max.

We leave the water heater on heat pump only mode ~100% of the time for maximal efficiency when it's just the 4 of us here. Normally with just a couple extra guests we simply turn up the heat pump temperature a few degrees and leave it in heat pump only mode.

However, maybe 1-2x a year for a couple hours total we use supplemental electric resistance heating when multiple guests are visiting for a few days and lots of showers, laundry, dishwasher use, etc. are to be had.

One thing previously brought up on this board was if the unit had TOU controls. Originally it did not have this functionality. For ~$49 we added a WiFi module (EcoNet) shortly after the time of purchase/install that lets one adjust some of the settings that can also be done right on the water heater like on/off, temperature, mode (heat pump only, hybrid, electric resistance only, etc), vacation mode, etc...

Finally yesterday EcoNet 2.0 software was available and installed on my iPhone with TOU controls. Thus far with 1 day of scheduling, testing has worked appropriately. I have the water heater set now only to act as a thermal battery and run the heat pump only during lowest TOU timeframes.
'19 Model 3 SR+ (own), '19 Leaf SV (leased), '12 Plug-in Prius (sold 3/19), '16 Leaf SV (prior lease), 11.43kW Solar PV (16MWh/yr real production), 20.5 SEER/13.0 HSPF ducted air-source heat pump, 3.70 UEF heat pump water heater, Induction Cooktop

Oilpan4
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Re: Share Your Home Electrification/Efficiency Improvements

Sat Aug 03, 2019 6:13 pm

Yeah I looked at those and figured the pay back time would be some time after it breaks or starts leaking.
My solution was to buy a used etech add on heat pump hot water heater for $300.
It was a process to get it ready, drained then dragged the hot water heater outside to flush out all the mineral build up. After I got it cleaned out the inside looked brand new.
Installed a magnesium anode.
Installed a 40 amp 10-50 range cord on the hot water heater. Terminated the original hot water heater wire at a 10-50 receptacle.
Rewired the hot water heater to run both heating elements at the same time if needed. Max draw is 25 amps on my fluke meter.
The way the manual says to wire in the heat pump is dumb so I wired it in on its own standalone thermostat and circuit. The heat pump is on its own little 10 amp circuit with 14/2 wire.
The heater elements can operate completely independent of the heatpump or together.
But the only time I run heat pump and the hot water heater elements at the same time is when I fill the hot tub.
Next step will be to figure out a way to heat water with the coal furnace in the winter.
2011 white SL leaf with 2014 batt.
Chargers: Panasonic brick moded for 240v, duosida 16a 240v and a 10kw setec portable CHAdeMO
Location: 88103

SageBrush
Posts: 4606
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: Share Your Home Electrification/Efficiency Improvements

Sun Aug 04, 2019 6:34 am

iPlug wrote:
Sat Aug 03, 2019 3:20 pm
Finally yesterday EcoNet 2.0 software was available and installed on my iPhone with TOU controls. Thus far with 1 day of scheduling, testing has worked appropriately. I have the water heater set now only to act as a thermal battery and run the heat pump only during lowest TOU timeframes.
I'm surprised you do not take the heat pump efficiency into account as well.
Second, I thought you have PV ?
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Two years in Colorado, now in NM
03/2018: 58 Ahr, 28k miles
11/2018: 56.16 Ahr, 30k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

iPlug
Posts: 411
Joined: Thu Apr 28, 2016 6:47 pm
Delivery Date: 25 Apr 2016
Location: Rocklin, CA

Re: Share Your Home Electrification/Efficiency Improvements

Sun Aug 04, 2019 7:16 am

SageBrush wrote:
Sun Aug 04, 2019 6:34 am
iPlug wrote:
Sat Aug 03, 2019 3:20 pm
Finally yesterday EcoNet 2.0 software was available and installed on my iPhone with TOU controls. Thus far with 1 day of scheduling, testing has worked appropriately. I have the water heater set now only to act as a thermal battery and run the heat pump only during lowest TOU timeframes.
I'm surprised you do not take the heat pump efficiency into account as well.
Second, I thought you have PV ?
Not sure I understand.

Do you mean why not run the heat pump more when the ambient air temperatures are highest? It is true that peak TOU is associated with higher ambient air temperatures.

Our TOU plan is off peak, partial peak, and peak. We remain off peak if avoid the following hours:
Summer 6 months: M-F 10am-9pm; Sat/Sun: 5-8pm
Winter 6 months: M-F 5-8pm, all other hours off peak

Not desert climate here, so it's still fairly warm in the late evening with plenty of ambient heat to extract from 9pm-midnight in the summer when the heat pump only needs to run a few hours a day. Also, we have large black garage doors that face SE so get a greenhouse effect in the morning as soon as sunlight hits. For example, just checked the ambient temperature by the air intake of the water heater this morning at 7:30am and it's low 80s ºF. During the winter 6 months, we only would have to avoid M-F 5-8pm TOU so little problem there.

I'll keep an eye on the daily energy use to see if efficiency seems to be significantly suffering by avoiding the highest ambient air temperatures that happen during peak TOU.

We do have solar PV and run a net surplus (to offset some of our carbon footprint beyond household energy use and personal transportation). In California, we are ok from an energy and environmental accounting standpoint of contributing more solar PV energy to the grid when it is in most demand and pulling in some high renewable/low carbon grid sourced electricity during off peak.
'19 Model 3 SR+ (own), '19 Leaf SV (leased), '12 Plug-in Prius (sold 3/19), '16 Leaf SV (prior lease), 11.43kW Solar PV (16MWh/yr real production), 20.5 SEER/13.0 HSPF ducted air-source heat pump, 3.70 UEF heat pump water heater, Induction Cooktop

SageBrush
Posts: 4606
Joined: Sun Mar 06, 2011 2:28 am
Delivery Date: 13 Feb 2017
Location: NM

Re: Share Your Home Electrification/Efficiency Improvements

Sun Aug 04, 2019 8:02 am

^ ^
It does get complicated, but if you send your excess PV generation to the grid you run the risk of the utility curtailing clean energy elsewhere and then using dirty energy yourself.

Using your own generation has these advantages:
1. You *know* it was not wasted
2. It reduces your net metering which has these positive effects:
- less political garbage of being subsidized by others
- less utility pressure to cancel net metering completely or add fees to home generators
- perhaps a more level load profile for the utility
3. Less uncertainty how dirty the returned energy via net metering is.

You might be able to improve on self-generation if you know the details of your local grid and its suppliers. If in doubt, self consume.
Last edited by SageBrush on Sun Aug 04, 2019 8:22 am, edited 1 time in total.
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Two years in Colorado, now in NM
03/2018: 58 Ahr, 28k miles
11/2018: 56.16 Ahr, 30k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

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