Question 1

can these be used for electric wall heaters

Accepted Answer

PLEASE DO NOT GUESS!

If you exceed the current rating of the plug you risk it overheating and, ultimately, starting a fire.

Electrical power is essentially P in Watts) = I (current in amps) x V (voltage in volts).  
Given the UK supply is nominally 230VAC and the current capacity of this smartplug is quoted as 13A, the MAXIMUM power rating for the smartplug should be:

13 x 230 = 2,990W = 2.99KW.

[This simple calculation excludes complications such as power factor on inductive or capacitive loads as household heating elements are essentially resistive loads having a power factor of ~1.]
=> a 1KW electric fire should be OK.

Please, people, do NOT guess and, if you don't know for certain, then simply don't comment - it's safer that way - because, if you get this stuff wrong it can be life-affecting!

Question 2

Would this support a hot tub ?

Accepted Answer

No, the weight of a hot tub would be far too much to be supported by the plug as it's only made of plastic, especially if the tub had water in it. You'll need a concrete base instead.

Question 3

Do I need to have the tapo app for daily use or can I just download the app to install and then delete the app and use it with Alexa?

Accepted Answer

You definitely don't need the app for daily use, no. Once you've set the plugs up and added them to Alexa or Google Home (or home assistant) then you can uninstall the app from your phone and just use voice control e.g. "turn on office plug". Schedules also work without your phone once you have set them up whether they are set up in the Tapo app or in Alexa/Google Home/home assistant.

Question 4

Is it possible to program a 7 day schedule with varying start and end times per day?

Accepted Answer

Yes, the app allows detailed scheduling to turn the socket on or off: different times each day and even using an offset from sunrise and sunset. Each on or off is independent so it is also possible to setup a number of times during the day where, for example, the socket will turn off even if there was no on event prior to it. This is useful if you will be manually turning the socket on (using the button on the side) and want to ensure it always turns off at a specific time - such as Xmas lights being turned on when you get home and then the schedule will ensure they are always turned off at 11pm.

ASIN	B07Z942YWS
Amperage	13 Amps
Best Sellers Rank	1,975 in DIY & Tools ( See Top 100 in DIY & Tools ) 12 in Smart & Remote Controlled Plugs
Brand	Tapo
Colour	white
Connector Type	Two-pronged (standard)
Country Of Origin	China
Customer Reviews	4.6 4.6 out of 5 stars (33,617)
Global Trade Identification Number	04897098680452
Included Components	Smart Wi-Fi Plug -Tapo P100
Item Highlight	Schedule & Timer, Device Sharing, Away Mode, Voice Control via Alexa & Google, App Remote Control, No Hub Required
Item Type Name	TP-LINK Tapo Wi-Fi Outlet, Works with Amazon Alexa (Echo and Echo Dot), Google Home, Wireless , Remote Control Timer Switch, Free Tapo App, No Hub Required
Item Weight	0.11 Kilograms
Manufacturer	Tapo
Manufacturer Part Number	TAPO P100(1-PACK)
Material	Polycarbonate (PC)
Model Number	Tapo P100
Number Of Wires	3
Number of Items	1
Number of Packs	1
Number of Poles	3
Plug Type	device plug
Product Warranty	2 year warranty
Specification Met	CE, CSA, NEMA, UL, cUL, cULus
Unit Count	1.0 count
Voltage	230 Volts

Tapo P100(1-pack) Smart Plug, Mini WiFi Plug Works with Alexa & Google

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