Power allowance for granny flat + garage?

Hi,

I plan to build an attached 2 bed granny flat + Double Garage.

I wonder if 32 amp sub board would be sufficient for granny flat with 5-6kw A/C or should I go for 40amp?

Similarly, would 32 amp sub board be enough provision for EV charging in the garage / workshop or should I go for 40amp?

Main board has 100 amp capacity.

Thanks!

 

A freestanding stove has a 32 amp service (7.7kw - 54cm white freestanding cooker - CFE547WB)

2 mixed power/light circuits @ 16 amps

HWS - 15 amp service (3.6 kw - https://rheem.com.au/rheem/medias/4...zIxMDVjNWVhZjU1MDdhNTdkMWU3Mg&attachment=true)

I'm up to 80amps though this could be reduced with gas or a solar array and batteries.

 

I forgot to mention, I will be using Instant gas HWS and gas cooktop. Oven WVE613S is rated 10 amps.

 

How do you work out the amp? Daikin 5 to 6kw A/C unit for example, only use 15amp.

 

@kennyboi

6 x 1000W / 240v = too much after beer o'clock.

 

Current is just power divided by voltage 7700w by 230v = 33.5a.
Don't let the AC kw confuse you, AC's list the cooling/heating capacity not the electrical load. Running current on a 6kw Mitsubishi Electric is about 7.5a (I don't have Daikin specs )

I'm installing a Tesla car charger tomorrow and its 32a, so you may want to reconsider if your going down that path.

You probably just want to talk to a local sparky, they can do a Max demand calculation, its not just a case of adding everything up, there are allowances to the fact that you don't use everything at the same time.

 

Hi forum members, if you have a granny flat, can I please know how many amp sub board you have in your build, and whether you think it is sufficient? Thanks!