boost3d

thank you so much and it helped to get some very useful insight and advice from the guys on the forum

Starting is the most important - the good thing is as your needs change and budget becomes available you can always expand - that's how i started. Goodluck and welcome to loadshed-free days 

So i begin my solar journey this week, a friend of mines has a small business so will be installing
1x luxpower hybrid 5kva inverter
1x solarwise 5.8kw battery
6x 450w panels
 
ideally i wouldve liked to have gone bigger on everything but the above just about squeezed all the budget i had .

When I say hybrid, I refer to an inverter that can operate both as an off-grid inverter and a grid-tie inverter (export).
A larger inverter for expansion in future is a good idea. Practically the battery cost kills you and you struggle to get exactly the same equipment that you installed previously.

MUST inverters doesn't leave you with much expandable options! The MPPT is low voltage so solar panels needs to be paralleled as the MPPT input voltage VOC( panel open curcuit voltage) is 60-130v for 8- 10kw inverter😏?
That is only part of the equation, low voltage high current means you must use much thicker (more copper) cables pushing up your costs. My 2c concerning inverters 1. Sunsynk or Deye 2.Growatt or Luxpower 3. Kodak or Voltronic equivalent i will personally not install MUST brands not inverters nor batteries.

If you have to use MUST: use one 5kW inverter and two 5kWh batteries.
The MUST inverter uses Pulse Width Modulation for solar charging. This is not an efficient way of getting energy out of solar panels. Rather get an inverter with two MPPT inputs and it would be best to get a hybrid inverter.

Refer to the discharge rate  of the batteries. The 200Ah can only be discharged at 100A thus is is a 0.5C battery. 

According to your attached sheets the 200ah is 0.5C lfp that means for the 200ah your max discharged will be 100A. It will limit your output to 4300 watts.

Compare the MUST 200ah to the FW 200ah huge diffrence in discharge/charge current.
Freedom-Won-Spec-sheet_LiTE-Home-10_8 (1).pdf