Granny leads have their place. Daily home charging is not it. Here is the difference — without the scare tactics.
What the boot cable actually is
The emergency charging cable that ships with many EVs is designed for occasional use on a normal power point. It is slow, often 10–15 km per hour, and it puts a sustained load on a household circuit that was never meant for hours of heavy draw.
It is fine for visiting a friend or tiding you over for a night while something better is on the way. It is not a long-term home charging plan.
Why proper equipment is different
A certified EV charger — portable or wall-mounted — is built for hours of continuous load. It talks to the car before it delivers power (the control pilot handshake), adjusts current to what the circuit allows, and shuts down safely if something is wrong.
That handshake is why EV charging is not "just a big extension lead". Cutting it out is how uncertified cheap units hit a price point — and how they fail in ways a power board does not.
Speed you will actually feel
Moving from a granny lead to a proper 7 kW-class portable often means going from teens of km per hour to thirties and forties. Same car, same driveway — you just stop waiting all weekend for a meaningful top-up.
If you charge overnight, you stop thinking about speed entirely. You wake up full.
Certification is not bureaucracy
In Australia, look for RCM marking and suppliers who can show product certification for the model you are buying. Our products are certified to the standards that apply to EV supply equipment — certificates are held per model.
A no-name online special with no paperwork is a lottery on the one device that sits between your home wiring and a lithium battery for eight hours.
What we recommend
Keep the boot cable in the car as a backup.
Use a certified portable charger at home if you want proper speeds without a fixed install yet.
Plan a wallbox when you are ready for a permanent solution — supplied by us, installed by your licensed electrician.
Key takeaways
- Granny leads are for occasional use — slow and not meant for nightly full loads
- Certified chargers handshake with the car before delivering power — that is the safety layer
- A proper portable unit typically triples useful charging speed vs a boot cable
- Buy Australian-certified gear with documentation — not anonymous online specials