So after everyone pretty much singing the same tune (aircon is a crazy big load
), and us taking some time to measure actual drain for our items (thanks for the tip). We have revised our needs and spreadsheet/pdf.
No More A/C
, we decided you guys were correct, over 50% of our daily needs on A/C, just wasn't worth all the money we would have to spend on extra panels, batteries and wiring. Once we removed the 5400W load from our system, our total daily dropped... a lot.
We may make wiring provisions for an A/C unit that can only be run from shore power or a generator, but for now, we are factoring it out.
We also managed to measure the real power drain of some of our household items (we have measured appliance names with an orange background)
With all this in mind, we are now thinking of going with a 24v 500AH
bank , as it goes nicely with our 24v starter system. Plus 24v appliances are much cheaper and easier to buy. We're planning for about 1750-2000W of solar, plus a beefier 24v alternator for emergency situations.
See attached PDF for our changes.
Thank so much for all your advice, it has helped us see the error of our ways, and yes we need to do a lot more research into solar setups, but I think, we are now in a better position to know what to look for.
Originally Posted by Ernst
I decided on 230 V AC for most appliances in my last three projects. Especially a fridge draws energy, not because of the current, but because of the time! An additional advantage is that domestic fridges (energy class A++ or A+++) use much less energy than DC fridges
Thanks for the advice , this advice is what we were after before everyone picked our numbers apart
, we're starting to think cheaper, efficient household appliances behind a quality (big) invertor, with as much 24v as possible, is our direction forward