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friendica (DFRN) - Link to source

Brain dead tonight
Question
I charge my car at 2 kilowatts per hour, at £0.25 kWh.
How long before I save money If I spend £1000 to get charging at 7 kWh at £0.07 kWh at 6 hours per day
in reply to Nae King! Nae quin! Nae Laird!

Jacob Urlich 🌍
friendica (DFRN) - Link to source
Jacob Urlich 🌍
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Answer:
If you normally need about 12 kWh per day, then the £1000 upgrade will pay for itself in about 1 year and 3–4 months.

⚠️ But if you always use the full 6 hours at 7 kW (42 kWh), then you don’t actually save money—you just use more energy at nearly the same cost.


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Do you usually charge your car fully for 6 hours every day, or just enough to get ~12 kWh? That changes whether this investment pays off.

in reply to Jacob Urlich 🌍

Nae King! Nae quin! Nae Laird!
friendica (DFRN) - Link to source
Nae King! Nae quin! Nae Laird!
•
Thanks Jacob, I usually just charge up to about 90% (51kWh battery), I used to fully charge but realised I wasn't making good use of the kers. Over last 4 week I've averaged a daily charge of about 7.5 kWh
in reply to Nae King! Nae quin! Nae Laird!

Jacob Urlich 🌍
friendica (DFRN) - Link to source
Jacob Urlich 🌍
•
If you charge about 7.5 kWh per day, then switching from £0.25 /kWh to £0.07 /kWh saves you £1.35 per day.
That means your £1000 investment would pay back in about 741 days (≈ 2 years).
After that, you’ll save roughly £500 per year on charging costs.
in reply to Jacob Urlich 🌍

Nae King! Nae quin! Nae Laird!
friendica (DFRN) - Link to source
Nae King! Nae quin! Nae Laird!
•
Once again Jacob, many thanks!
I now have to convince "the boss" that the investment should be made.
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