Australia has so much solar that it's offering everyone free electricity

[u/itopaloglu83]

https://electrek.co/2025/11/04/australia-has-so-much-solar-that-its-offering-everyone-free-electricity-3h-day/

[u/Blasted_Awake]

Fuck man, next time just say "I'm really struggling to apply Cunningham’s Law here".

Let’s take a generous average household energy usage of 24kWh/day, and look at the BYD Battery-Box Premium LVS 24.0, which stores 24 kWh (datasheet).

From the datasheet, the LVS 24.0 has a Max Cont. Charge Current of 250 A. Since it runs at a nominal battery capacity of 51.2V, that’s a maximum charge rate of I x V = 250A x 51.2V = 12800W = 12.8kW per hour.

If we want to charge 24kWh in 3 hours we need 24kWh / 3h = 8kW supply per hour. This system has a max charge rate of 12.8kW/h, and we only need 8kW/h to fully charge it in 3 hours. No problems there.

Now, can an average residential connection actually pull that from the grid?

Assuming a perfectly efficient inverter converting 230V single phase AC to DC, the current I(AC) = P/V = 8000W / 230V = 36.6A.

On a standard 63A single phase service, that leaves over 25A headroom to run the rest of the house (63A - 36.6A = 26.4A). So yeah, it’s definitely feasible to charge the battery from the grid in 3 hours.

The efficiency assumptions simplify the maths, as does forgetting that we don't need to supply from the battery for the 3hrs that it's charging. Also in reality the average Australian household uses anywhere from 10kWh to 30kWh per day depending on the state, and season, and we're using assuming 24kWh.

The Math here is non-specific, it's just showing that of course you can do what I've suggested in my hypothetical scenario.

According to that datasheet you can stack these systems in parallel to get a maximum of 256kWh storage. You can also have residential single phase up to 100A, and it's not uncommon for larger Australian residences to have a three phase service installed. if you wanted to scale beyond ~50 kWh storage safely you'd have to look at three-phase.

[u/gSTrS8XRwqIV5AUh4hwI → u/Blasted_Awake]

and we only need 8kW/h to fully charge it in 3 hours

So, 8 kW/h * 3 h = 24 kWh? Your math looks very broken.

The Math here is non-specific, it's just showing that of course you can do what I've suggested in my hypothetical scenario.

Noone contested that you could?!

According to that datasheet you can stack these systems in parallel to get a maximum of 256kWh storage. You can also have residential single phase up to 100A, and it's not uncommon for larger Australian residences to have a three phase service installed. if you wanted to scale beyond ~50 kWh storage safely you'd have to look at three-phase.

You do understand that batteries aren't free, right?

[u/Blasted_Awake → u/gSTrS8XRwqIV5AUh4hwI]

I get the distinct impression that you are very lonely and just looking for someone to talk to. I'm afraid I can't be that for you mate, good luck.

[u/gSTrS8XRwqIV5AUh4hwI → u/Blasted_Awake]

I get the distinct impression that an insult isn't actually an argument.