Far too many variables for any claims made in this thread to be useful to others. If what someone has works for them that is all that matters. Extrapolating that to other's use without including ALL variables is pretty meaningless.
The chart itself is nonsense as it only refers 'ideal conditions' & 'allowing for 3 days of poor conditions'. Neither are defined, no ambient temps, no info as to what settings the fridges are set on etc etc. No average sun hours (which vary enormously from north to south & winter to summer) etc etc. What gets someone through for 3 days is totally different to what might be required for a week plus. ie. after 3 days re-charge on mains/gennie? or solar only indefinitely.
I don't believe those Engel figures, but suspect that the waeco figures are probably close to the mark if based upon an average of say 5 sun hours per day (but who would know - it is not specified). In Vic, it can often be 3 or less.
Likewise, folk reporting what works for them only quoting solar capacity/battery capacity is similarly misleading, albeit well meaning.
The real problem is that often folk who want to set up with solar, but know little to nothing about it just want someone else to tell them what they need, without understanding that what they need is very individualised. What works perfectly for one person can prove quite inadequate for another. Patterns of usage are everything! Just copying someone else's set up *may* work, but just as likely *may* not. Any good seller will help the buyer to undertake a a usage & consumption audit looking at all the variables before recommending anything. Anything else is just a shot in the dark.
Working out what your pattern of usage might be BEFORE setting up can be quite daunting, but it is neccessary to ensure you get what YOU want. Anyone can add up the consumption figures of their various appliances, but working out the usage pattern is the hard part. To be covered you need to have a sense of worst case scenario. How long, where, & when. Far better IMO to over rather than under estimate. Having a bit too much solar or battery capacity costs you in space & weight, Not having enough results in frustration & disappointment.
I doubt that everyone will share my view. Some may see trying to wing it on a minimalist set up as manageable, but like with many things setting up solar is one of those things where I believe it makes sense to 'do it once & do it right'. A well set up solar system (one that is 'balanced - ie. can bring the batteries back to float every 24 hours) is something which once achieved can bring a little satisfied smile to your face every day. Nothing beats just knowing that you have all the power you need from the sun with virtually no ongoing costs. It's just getting through the first stage which can seem a tad overwhelming ......... but it is worth it........ & whilst there is cost involved the initial outlay can be a lot less that the greater cost of upgrading to what you really needed.
When tables as posted are produced they can be helpful to give folk an idea ......... but they are a shot in the dark & can mislead. No skin of a sellers nose, as if they have sold you an inadequate system, they've made their sale & can always sell you more to make up an initial shortfall. In the meantime you might've had a lovely 3 weeks away marred by warm beer & a grumpy wife & a battery you've wrecked.
I'm generally happy to try to help others work out what they need, but doing so involves me asking just as many questions as I get asked. An alternative, which I reckon it is hard to beat is to suggest that folk outlay around $40 on one of
Collyn Rivers books on Solar. They are easy to read for the non technically minded but cover all that is required. Even if paying someone else to set up a system for you rather than doing it yourself, getting the understanding that these books gives you would be *very* helpful.