| Pages:
1
2
3
4
..
7 |
Bob and Susan
Elite Nomad
Posts: 8802
Registered: 8-20-2003
Location: Mulege BCS on the BAY
Member Is Offline
Mood: Full Time Residents
|
|
more money /// its ALWAYS about the profit
take apart a 12v and a 48v inverter...its just a bunch of circuit boards now days
they do make the 48v inverters higher wattage capacity but if they beefed up a 12v the same wattage could be obtained
hottest part of the day is 2pm to 9pm... it would seem that is the best time to run AC
|
|
|
AKgringo
Elite Nomad
Posts: 5805
Registered: 9-20-2014
Location: Anchorage, AK (no mas!)
Member Is Offline
Mood: Retireded
|
|
I know very little about design of electric systems, but I know that resistance is part of the equation. The size, and length of the wires matters!
When my ski club in Anchorage decided to install lights for night skiing, we wound up using 660v lights at low watts for the most efficiency.
If you are not living on the edge, you are taking up too much space!
"Could do better if he tried!" Report card comments from most of my grade school teachers. Sadly, still true!
|
|
|
Bob and Susan
Elite Nomad
Posts: 8802
Registered: 8-20-2003
Location: Mulege BCS on the BAY
Member Is Offline
Mood: Full Time Residents
|
|
that doesnt sound right...
|
|
|
AKgringo
Elite Nomad
Posts: 5805
Registered: 9-20-2014
Location: Anchorage, AK (no mas!)
Member Is Offline
Mood: Retireded
|
|
Like I said, it is not my field. Maybe it was 660v with low amps? They put out quite a bit of light, but did not give off a lot of heat.
If you are not living on the edge, you are taking up too much space!
"Could do better if he tried!" Report card comments from most of my grade school teachers. Sadly, still true!
|
|
|
Don Pisto
Super Nomad
Posts: 1230
Registered: 8-1-2018
Location: El Pescador
Member Is Offline
Mood: weary like everyone else
|
|
of course its about saving money and weight. take a look at a modern wiring harness in a new car vs an old 12 volt harness.
there's only two things in life but I forget what they are........
John Hiatt
|
|
|
Bob and Susan
Elite Nomad
Posts: 8802
Registered: 8-20-2003
Location: Mulege BCS on the BAY
Member Is Offline
Mood: Full Time Residents
|
|
geeez a new car wire harness is 12v....normally
|
|
|
RFClark
Super Nomad
Posts: 2331
Registered: 8-27-2015
Member Is Offline
Mood: Looking forward to 2024
|
|
B&S,
I understand you plug your house into the 12V plug on your car. BTW big trucks are 24V and have been for years. Other heavy equipment and AC run 48V.
|
|
|
BajaTed
Senior Nomad
Posts: 859
Registered: 5-2-2010
Location: Bajamar
Member Is Offline
|
|
Quote: Originally posted by AKgringo  | I know very little about design of electric systems, but I know that resistance is part of the equation. The size, and length of the wires matters!
When my ski club in Anchorage decided to install lights for night skiing, we wound up using 660v lights at low watts for the most efficiency.
|
Goal was to mitigate install cost of lower voltage systems due to wire lengths it would seem.
Es Todo Bueno
|
|
|
willardguy
Elite Nomad
Posts: 6451
Registered: 9-19-2009
Member Is Offline
|
|
there it is, a true Bobism! better get used to 48 volt systems Bob, they're already here
|
|
|
BajaTed
Senior Nomad
Posts: 859
Registered: 5-2-2010
Location: Bajamar
Member Is Offline
|
|
| Quote: Originally posted by David K | Ted, which is it?
A: "the efficiency of a 120-volt air conditioner and a 220-volt air conditioner are about the same, and the power used is about the same."
B: "120V; air conditioners are ineffective and will consume too much power when placed in a room that is too large for them, while 220V air
conditioners placed in a smaller room will reduce efficiency."
Will a 120 volt be fine in a smaller room?
Will a 220 volt be fine in a larger room?
Why is a 220 volt not efficient in a smaller room?
Thank you and sorry if my mind is a bit muddled at trying to understand this. I appreciate your time to answer. |
My AZ home is 220 Vac because the A/C unit is about 70' away from the main panel. BTU's are whatt count but install costs due to distances are a
factor too.
[Edited on 8-18-2022 by BajaTed]
Es Todo Bueno
|
|
|
BajaTed
Senior Nomad
Posts: 859
Registered: 5-2-2010
Location: Bajamar
Member Is Offline
|
|
Four 15 amp plugs @ 12 VDC is 300 amps, that is costly wire on the DC system side.
48 VDC is 75 Amps, less costly wire.
Both same system efficiency.
"Only God & Electricians can make light safe or safe light"
Es Todo Bueno
|
|
|
Bob and Susan
Elite Nomad
Posts: 8802
Registered: 8-20-2003
Location: Mulege BCS on the BAY
Member Is Offline
Mood: Full Time Residents
|
|
| Quote: Originally posted by RFClark | B&S,
I understand you plug your house into the 12V plug on your car. BTW big trucks are 24V and have been for years. Other heavy equipment and AC run 48V.
|
read....the post says car not SEMI Truck
even pickups are 12v even if they have 2 batteries
|
|
|
Bob and Susan
Elite Nomad
Posts: 8802
Registered: 8-20-2003
Location: Mulege BCS on the BAY
Member Is Offline
Mood: Full Time Residents
|
|
| Quote: Originally posted by BajaTed | | My AZ home is 220 Vac because the A/C unit is about 70' away from the main panel. BTU's are whatt count but install costs due to distances are a
factor too. |
some installer sold you a "bill of goods"
70 feet is NOTHING for 110v
110v can go along way
remember 220v is just two 110v lines hooked to you AC unit
|
|
|
mjs
Nomad
Posts: 305
Registered: 2-20-2013
Location: Off grid in San Felipe
Member Is Offline
|
|
B&S. Suggest you read up on Ohm's law and voltage drop. Higher voltage is always better for higher efficiency (for overall system design not
necessarily a single appliance) and longer wire runs with smaller gauge wire. Why much of the world is 230 volt and commercial/ industrial facilities
are 277/480 volt or more.
FYI, don't be cutting any of the orange cables in your new car as these are high voltage (as identified by the orange color).
|
|
|
SFandH
Elite Nomad
Posts: 6924
Registered: 8-5-2011
Member Is Offline
|
|
Isn't there a safety consideration in the 120 vs. 240 volt debate? I find 120 volt jolts shocking. I've never experienced a 240 volt jolt and don't
want to. Electricity frightens me.
How much power is floating around in the wires in electric cars?
Newsflash: "Man electrocuted, fried to a crisp, trying to fix broken down Tesla."
|
|
|
David K
Honored Nomad
Posts: 64479
Registered: 8-30-2002
Location: San Diego County
Member Is Offline
Mood: Have Baja Fever
|
|
| Quote: Originally posted by Bob and Susan | | Quote: Originally posted by RFClark | B&S,
I understand you plug your house into the 12V plug on your car. BTW big trucks are 24V and have been for years. Other heavy equipment and AC run 48V.
|
read....the post says car not SEMI Truck
even pickups are 12v even if they have 2 batteries
|
My first car (VW powered buggy) was 6-volt. Jeeps were also 6 volts to 1956.
|
|
|
David K
Honored Nomad
Posts: 64479
Registered: 8-30-2002
Location: San Diego County
Member Is Offline
Mood: Have Baja Fever
|
|
| Quote: Originally posted by BajaTed | | Quote: Originally posted by David K | Ted, which is it?
A: "the efficiency of a 120-volt air conditioner and a 220-volt air conditioner are about the same, and the power used is about the same."
B: "120V; air conditioners are ineffective and will consume too much power when placed in a room that is too large for them, while 220V air
conditioners placed in a smaller room will reduce efficiency."
Will a 120 volt be fine in a smaller room?
Will a 220 volt be fine in a larger room?
Why is a 220 volt not efficient in a smaller room?
Thank you and sorry if my mind is a bit muddled at trying to understand this. I appreciate your time to answer. |
My AZ home is 220 Vac because the A/C unit is about 70' away from the main panel. BTU's are whatt count but install costs due to distances are a
factor too.
|
Sorry, I am not seeing the answers, but understand about distance being aided with the use of 220v.
I am still interested in learning the answer to my questions... anyone?
|
|
|
Don Pisto
Super Nomad
Posts: 1230
Registered: 8-1-2018
Location: El Pescador
Member Is Offline
Mood: weary like everyone else
|
|
| Quote: Originally posted by SFandH | Isn't there a safety consideration in the 120 vs. 240 volt debate? I find 120 volt jolts shocking. I've never experienced a 240 volt jolt and don't
want to. Electricity frightens me.
How much power is floating around in the wires in electric cars?
Newsflash: "Man electrocuted, fried to a crisp, trying to fix broken down Tesla." |
all old timer electricians used their fingers to test circuits 110 to 220, as long as you're not standing in a puddle and use two fingers on one hand
you're fine. I've seen em lick their fingers! I've done it but I'll opt for the wiggy!
there's only two things in life but I forget what they are........
John Hiatt
|
|
|
pacificobob
Super Nomad
Posts: 2237
Registered: 4-23-2006
Member Is Offline
|
|
Folks who are confused regarding Ohm's law often find it helpful to think of a water pipe as an analogy.
Pipe diameter = resistance
Pressure = volts
GPM= amps
|
|
|
SFandH
Elite Nomad
Posts: 6924
Registered: 8-5-2011
Member Is Offline
|
|
| Quote: Originally posted by Don Pisto |
all old timer electricians used their fingers to test circuits 110 to 220, as long as you're not standing in a puddle and use two fingers on one hand
you're fine. I've seen em lick their fingers! I've done it but I'll opt for the wiggy! |
Really? Oh man, I hate getting shocked. There have been a few times. I have an old wiggy in my toolbox.
|
|
|
| Pages:
1
2
3
4
..
7 |
![[*]](images/xmbforum/default_icon.gif){kind=icon}
