What PV panels are you looking to purchase? Brand and capacity or model number would be great to know. If maximum return on money spent is your main goal, matching the panels to a conversion system is Paramount.
Planning and comparison of key components is very important. Your time and effort up front, ironing out details, making sure what you plan is approved by your local authorities, and verifying everything will do what you want it to, is cheap and/or free. Once you submit plans and start buying materials,try to stick with the original plan. If you change your mind, it's usually not cheap.
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