Hey what’s up everyone. 
like so many here I’m new to solar and I have been reading my ass off for the last few days to figure out what to do. 
Probably been asked before a million times too I know.
My house is setup as follows.

- Pitch roof north facing

- 2 x 200L geysers with those solar tube guys and 2 geyserwise timers

- gas hob and electric oven

- pool pump 0.750w with salt chlorinator 

- I’m generating roughly 20 to 25kw a day

- led bulbs in all the lights 

- 1 x washing machine and 1 x tumble dryer/washing machine in 1 

- side by side fridge and freezer

- wine cooler and of course a beer fridge 

- dishwasher 

The situation is a bit complicated because I don’t have a garage and my DB board is in my walk-in closet so no space there either and noise will be an issue too so I kinda have to install the system in the covered veranda. Obviously I have to make it as neat and “hidden” as possible to keep the wife happy. My budget is 65k so obviously I will start there and grow. Mostly self install except for the DB board connectivity. 
So was thinking of this and this is where I need the unbelievable brain power that’s on this forum. 

- looking at a sunsync, Deye, or goodwe  8kw inverter because I cannot stack 2 5kw.  I must say Holy crap the sunsync’s, Deye are flipping massive too.

- then 4 x 470w or 540/545w panels

- potentially 1 x 48v 3.2kw dyness lithium iron battery.

- will this setup work with battery? Should I skip the battery and add more panels.

- should I look at another inverter? There aren’t many 8kw out there. I wish the 8/10 kw luxpower inverters we’re available on SA. I really like them for some reason.

any site recommendations to buy from?

any good places to get fuses and switches for the controller box etc etc. 

so that’s my long winded story looking forward to the feedback. 

You cannot go wrong with the 8kw Sunsynk. It will also future proof better than the 5kw unit. 

You probably meant to say usage is between 20 and 25kwh per day? 

Geyers are sorted so we will leave those as is. 

You need to ask yourself what your peak usage is and at what time of the day. Your house might idle at 500watt during the day but when everyone arrives home at late afternoon and start using power, there is no sunshine left and you either revert to eskom or batteries or combined. The sunsynk blends all power sources like a boss. 

For 65k worth of moneys you can get a 8kw Sunsynk, 5 x 540w panels and then all wiring, db boards, breakers etc. Wiring etc can easily run into the R10k+ area depending on lengths required. Also throw in any tools you might need to buy like I had to ie crimper, multi meter, label maker etc etc. Few trips to the hardware store for that little thing you forgot about or specd wrong can easily run into thousands. The you panels mounting hardware as well. 

So you might just just make it with 65k on a nice inverter, few panels and no battery but a decent infrastructure to build onto in the near future. 

Alternatively you could go 5kw sunsynk which allows 35amp pass through under eskom support and 5kw under load shedding. This will save you 10k to buy more panels or towards a battery. 

Then you gotta remember that say a 5kw battery with a .5c discharge rate can only supply 2.5kw to your loads. Some batteries like Hubble are rated 1c so good for 5kw discharge rate. Just keep that in mind. 

So depending on your usage patterns you will decide on what takes preference and if you must have load shedding backup then a battery is a no brainer and even a 2.4kwh battery could power your lights and tvs through load shedding. Just ensure proper essentials wiring of the DBs the. If usage is mostly when sun shines then focus on PV output. 

Bit deurmekaar but hope it helps. 

@JoeSlowthanks for the response you are an absolute machine. 
Oh and yes I did mean to say usage is between 20 and 25kwh per day? 

An 8K Sunsynk should be able to handle all of that, if the loads are properly split.

On your question of more panels vs more battery, it depends on your priorities and what you want to achieve. Do you value reliable power vs savings? You could have both, but you will need more Capex and I assume that this is a limiting factor. Just remember that you can use the Sunsynk hybrid without a battery, but then it will act as a normal grid-tie inverter (i.e. it will go down when Eskom is down). So a small battery is highly recommended to make the most of your panels.  

 

Another thing: you need a reliable and reputable supplier that can give you good advice, and that has great pricing. Speak to Steve from The Powerforumstore.