Li-hook tsa marulelo ke likarolo tsa bohlokoa tsa sistimi ea matla a letsatsi 'me li sebelisoa haholo ho beha sistimi ea racking ea PV ka mokhoa o sireletsehileng marulelong a mefuta e fapaneng. E matlafatsa polokeho le ts'ebetso ea kakaretso ea sistimi ka ho fana ka ntlha e matla ea ankora ho netefatsa hore liphanele tsa letsatsi li lula li tsitsitse ka lebaka la moea, ho thothomela le lintlha tse ling tsa tikoloho tse kantle.
Ka ho khetha li-Roof Hooks tsa rona, u tla fumana tharollo e tsitsitseng le e ka tšeptjoang ea ho kenya tsamaiso ea letsatsi e tiisang tšireletso ea nako e telele le katleho ea tsamaiso ea hau ea PV.