Re: [mh] Whole home power monitoring

Thanks Paul! I think the heater is around 3000w and the steam generator also 3000w. 

Good to know about 100a on each phase. The electrician had to do some balancing when I installed an induction cooktop (50a), and a second AC (20a). 

I can now read my meters and I’m charting the changes by minute. Hopefully by aggregating them by hour, I’ll have a better idea of usage. I think I have my uom wrong though. I don’t think it measures in kwh based on today’s values. From 9:37 to 1:52 the meter changed by 1246, so maybe just watt-hours?

05/24/21 09:37:41 AM [mqtt_emon]: Power changed 9853263 kwh
05/24/21 09:38:12 AM [mqtt_emon]: Power changed 9853269 kwh
05/24/21 09:38:42 AM [mqtt_emon]: Power changed 9853276 kwh

[…]

05/24/21 01:48:42 PM [mqtt_emon]: Power changed 9854489 kwh
05/24/21 01:49:12 PM [mqtt_emon]: Power changed 9854492 kwh
05/24/21 01:49:42 PM [mqtt_emon]: Power changed 9854494 kwh
05/24/21 01:51:12 PM [mqtt_emon]: Power changed 9854503 kwh
05/24/21 01:52:12 PM [mqtt_emon]: Power changed 9854509 kwh


> On May 24, 2021, at 10:09 AM, Paul Onley <[email protected]> wrote:
> 
> You need to talk to your utility, in most cases a 100A service is not rated for 100A continuous. I had this issue a few years back when I installed an electric boiler. While I would have been below the 200A service I had I would have been over the 170A I was really allowed to use on some occasions. Your utility is the final authority on that. How much will the Heater and Steam generator draw?
> 
> Also with split phase it is important to measure the load on each phase, with a 100A service you have 100A @ 240V which is broken down as 100A @ 120V times 2 in your panel. Depending on how well the builder did his load analysis and what changes have been made since, one phase may be more heavily loaded than the other.
> 
> As far as Power and Amps goes
> 
> Power = Voltage * Amps
> 
> or
> 
> Power / Voltage = Amps
> 
> 
> 
> On 5/23/21 5:52 PM, H Plato wrote:
>> I’m looking to add 2 additional 240V circuits, one for an outdoor IR patio heater, and another for a steam generator. Having an idea of overall usage will give me an idea of power peaks and the general load.
>> 
>> I actually coded support for the sonoff power monitoring plug. I think I updated master. I also added in RRD support for any item so that they can be graphed in IA7.
>> 
>> The RTLAMR stuff is pretty neat if you have smart meters. I think I spent $20 on a USB Software defined radio adapter, and I can see my gas, water, and power meter updates in near real time. I think I’m going to pipe the output to a perl script that will take a matching ID and then send an update out via MQTT, unless anyone else has any ideas?
>> 
>> This is the output:
>> 
>> 30273954 is my water meter
>> 45275915 is my gas meter
>> 3442387 is my power meter
>> 
>> mh@s1:~# rtlamr -server=127.0.0.1:1432
>> 16:38:54.987638 decode.go:45: CenterFreq: 912600155
>> 16:38:55.046947 decode.go:46: SampleRate: 2359296
>> 16:38:55.046964 decode.go:47: DataRate: 32768
>> 16:38:55.046974 decode.go:48: ChipLength: 72
>> 16:38:55.046985 decode.go:49: PreambleSymbols: 21
>> 16:38:55.046995 decode.go:50: PreambleLength: 3024
>> 16:38:55.047005 decode.go:51: PacketSymbols: 96
>> 16:38:55.047015 decode.go:52: PacketLength: 13824
>> 16:38:55.047028 decode.go:59: Protocols: scm
>> 16:38:55.047038 decode.go:60: Preambles: 111110010101001100000
>> 16:38:55.047049 main.go:124: GainCount: 29
>> {Time:2021-05-23T16:38:58.575 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:39:12.963 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:39:19.966 SCM:{ID:45275915 Type:12 Tamper:{Phy:00 Enc:00} Consumption:  911664 CRC:0x162A}}
>> {Time:2021-05-23T16:39:26.690 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:39:40.907 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:39:41.297 SCM:{ID: 3442387 Type: 5 Tamper:{Phy:01 Enc:03} Consumption: 9848673 CRC:0xEDB3}}
>> {Time:2021-05-23T16:39:43.745 SCM:{ID:45275962 Type:12 Tamper:{Phy:02 Enc:00} Consumption:  138690 CRC:0xEE5E}}
>> {Time:2021-05-23T16:39:54.578 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:40:01.964 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:40:03.968 SCM:{ID:45275915 Type:12 Tamper:{Phy:00 Enc:00} Consumption:  911664 CRC:0x162A}}
>> {Time:2021-05-23T16:40:19.968 SCM:{ID:45275915 Type:12 Tamper:{Phy:00 Enc:00} Consumption:  911664 CRC:0x162A}}
>> {Time:2021-05-23T16:40:29.523 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:40:41.300 SCM:{ID: 3442387 Type: 5 Tamper:{Phy:01 Enc:03} Consumption: 9848686 CRC:0xEB81}}
>> {Time:2021-05-23T16:40:57.748 SCM:{ID:45275962 Type:12 Tamper:{Phy:02 Enc:00} Consumption:  138691 CRC:0x0CBC}}
>> {Time:2021-05-23T16:41:11.302 SCM:{ID: 3442387 Type: 5 Tamper:{Phy:01 Enc:03} Consumption: 9848692 CRC:0xDDC8}}
>> {Time:2021-05-23T16:41:19.972 SCM:{ID:45275915 Type:12 Tamper:{Phy:00 Enc:00} Consumption:  911665 CRC:0xF4C8}}
>> {Time:2021-05-23T16:41:32.640 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:41:33.973 SCM:{ID:45275915 Type:12 Tamper:{Phy:00 Enc:00} Consumption:  911665 CRC:0xF4C8}}
>> {Time:2021-05-23T16:41:43.251 SCM:{ID:45275962 Type:12 Tamper:{Phy:02 Enc:00} Consumption:  138691 CRC:0x0CBC}}
>> {Time:2021-05-23T16:41:46.642 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:42:00.754 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:42:04.475 SCM:{ID:45275915 Type:12 Tamper:{Phy:00 Enc:00} Consumption:  911666 CRC:0xBC8D}}
>> {Time:2021-05-23T16:42:11.805 SCM:{ID: 3442387 Type: 5 Tamper:{Phy:01 Enc:03} Consumption: 9848704 CRC:0x84C5}}
>> {Time:2021-05-23T16:42:27.753 SCM:{ID:45275962 Type:12 Tamper:{Phy:02 Enc:00} Consumption:  138692 CRC:0x7ED4}}
>> {Time:2021-05-23T16:42:42.920 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:42:56.531 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:43:04.979 SCM:{ID:45275915 Type:12 Tamper:{Phy:00 Enc:00} Consumption:  911666 CRC:0xBC8D}}
>> {Time:2021-05-23T16:43:10.308 SCM:{ID: 3442387 Type: 5 Tamper:{Phy:01 Enc:03} Consumption: 9848716 CRC:0xCAB2}}
>> {Time:2021-05-23T16:43:17.704 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:43:45.592 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> {Time:2021-05-23T16:43:59.979 SCM:{ID:30273954 Type:13 Tamper:{Phy:00 Enc:00} Consumption:  224484 CRC:0x4873}}
>> 
>> 
>>> On May 23, 2021, at 4:04 PM, Jeff Siddall via misterhouse-users <[email protected]> wrote:
>>> 
>>> On 5/23/21 10:41 AM, H Plato wrote:
>>>> Has anyone found any good DIY power monitoring solutions? My panel is full and I’d to get an idea of the average and peak load. I have a 100a service, and the wiring from the utility isn’t sized for 200a, so an upgrade would be pretty expensive. I’m hoping that the usage is low enough that I can just replace the panel without upgrading the service, so having usage tracking would be really helpful.
>>> Are you planning on adding new electrical devices/appliances, or just more outlets/lights?
>>> 
>>> Ultimately, the size of your service determines how many "things" can be running at the same time.  If you aren't adding (or many) more "things" then you likely don't need a bigger service regardless of how many breakers/fuses you add.
>>> 
>>> If you want to be a little more scientific without spending any money you can fire up a spreadsheet.  Getting average power usage is pretty easy: get the total kWh from your power bill and divide it by the number of hours in the billing period.  Getting peak current, which can tell you how close you are to exceeding your service capacity, is much trickier.  However, you might be able to get a rough estimate simply by looking up the power rating of all your electrical equipment and adding it all up.  That would simulate a worst-case scenario, like after a power outage, when everything tends to come on at once.  Start with the power hungry things, like electric heaters, AC units, electric range, electric clothes dryer, fridges, freezers, microwave, dishwasher etc.
>>> 
>>> Even better, at least for plug-in appliances, is to get a plug-in power meter such as a Kill-A-Watt and find out what your power hungry devices draw, then add those up.
>>> 
>>> Good luck!
>>> 
>>> 
>>> 
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