You are correct, it’s undersize. But in economic terms, the grid is a much cheaper and bigger battery for normal everyday household consumption given current feed in tariffs.
The battery is more about energy security. Keep in mind most solar will be cut off when the grid goes down. People won’t be able to generate at all because the utility shuts down their solar remotely to stop them exporting. The Tesla has a gateway to allow you to generate behind the battery.
The battery is more about energy security. Keep in mind most solar will be cut off when the grid goes down. People won’t be able to generate at all because the utility shuts down their solar remotely to stop them exporting. The Tesla has a gateway to allow you to generate behind the battery.
Is that legal somehow? How does it work? Does it inject to a completely different line in your house or is able to somehow isolate from the grid so that no electricity is injected back?
Have you considered installing one of those cheap small aircon split unit (one with 1kw max) in at least one room, ie the bedroom, so in case of a blackout you have some air conditioning at least? Obviously your 7kw central unit is a no-go without the grid and that is probably the only thing missing in your nice setup.
The gateway sits between the battery/solar and the meter. So the meter never sees electricity which is produced by the panels and stored by the battery or consumed by the house. In a power cut the gateway closes, and production can continue behind the gateway.
It’s signed off by the installer and inspected by the utility so completely legal (although US may be different).
I don’t understand air conditioner ratings. Our main system is rated 1800 watt but pulls 6kw. Wtf? Can someone with more electrical knowledge than me explain how this works?
We have a few smaller splits but they aren’t that small. They will still pull 2 - 3kw each.
interesting, so it does the same that other systems could do, but it is legal. I would assume it is just that in your country you can do that, but you also mentioned that most systems can't generate during a blackout.. So I guess it is something about the Tesla, or the way it does... or just that they have certified that it is safe and other don't.
About the aircon... what do you mean pull? You mean you checked with a meter it does consume 6kw instead of 1.8kw?
If not, you need to consider that heat pumps have an efficiency of around 3.5x, which means that with a 1.8KW in electricity they could produce 6.3kw of heat. Your numbers might vary depending on specs and some other factors, etc... but somehow fit your figures.
If the 6kw figure is what you have metered it is consuming in electricity... then a picture of the spec label might help here.
2-3kw splits looks like way too much for a room. Now I am starting to think you refer to the output and not the electricity input. Unless your rooms are HUGE or you live in a ridiculously extreme climate place.
