Kiwi2000
Solar Enthusiast
2 - Suddenly we've been on a big kick of buying appliances that we finally have the oomph to run. We've got a dishwasher being delivered on Monday, we're buying a new induction cooktop, and we've got a benchtop combi-oven on order. The combi-oven and induction cooktop will only be used from mid-Spring - mid-Autumn when we have plenty of excess solar. We bought a fancy woodstove a couple of years ago that's specifically designed for cooking and we have a fire every day in the colder times of the year so already have a hot cooktop and oven. The dishwasher is rated at 560Wh/day, but we'll have it hooked up to the hot water heater directly so it should be less than that...
I think you'll need to work backwards from your loads. Look at what those appliances are going to draw then do the numbers on how you will power them.
Some modern dishwashers heat the water as they run and can draw several kilowatts. Trying to run those off 12v may be next to impossible.
I know what you mean about the availability of 12v batteries and components in New Zealand compared to 24 or 48v batteries.
I run most of my house on a 12v system. All reasonably small loads though. The biggest load is the 2000w hot water cylinder element. And I run that off its own dedicated 3000w inverter.