一個性能(neng)(neng)(neng)良好的(de)光伏(fu)控制器(qi)應具(ju)(ju)有控制蓄電(dian)池充(chong)放電(dian)、溫度調節、.大功率(lv)跟蹤(zong)和(he)過(guo)(guo)充(chong)保(bao)(bao)護(hu)(hu)、過(guo)(guo)放保(bao)(bao)護(hu)(hu)、短(duan)路保(bao)(bao)護(hu)(hu)、反接保(bao)(bao)護(hu)(hu)等多種保(bao)(bao)護(hu)(hu)功能(neng)(neng)(neng)以(yi)及自動開(kai)關和(he)時間調整功能(neng)(neng)(neng),從而**系(xi)統(tong)可(ke)靠運行,同(tong)時光伏(fu)控制器(qi)還有具(ju)(ju)有使太(tai)陽能(neng)(neng)(neng)電(dian)池組件可(ke)以(yi)在不(bu)同(tong)溫度和(he)不(bu)同(tong)太(tai)陽輻照情(qing)況下智能(neng)(neng)(neng)的(de)輸出.大功率(lv)功能(neng)(neng)(neng),以(yi)使太(tai)陽能(neng)(neng)(neng)光伏(fu)系(xi)統(tong)具(ju)(ju)有很高的(de)效率(lv)。
選擇(ze)蓄電(dian)池(chi)容(rong)量的(de)(de)一般原(yuan)則(ze)是:首先夠滿(man)足夜晚照(zhao)明要求,并能(neng)把白(bai)天太陽能(neng)電(dian)池(chi)組(zu)件產(chan)生(sheng)的(de)(de)能(neng)量盡量存儲下來,同(tong)時(shi)還(huan)能(neng)滿(man)足連續(xu)陰(yin)雨天夜晚照(zhao)明需要的(de)(de)電(dian)能(neng)。蓄電(dian)池(chi)容(rong)量過小不(bu)能(neng)滿(man)足夜晚照(zhao)明的(de)(de)需要,蓄電(dian)池(chi)容(rong)量過大,蓄電(dian)池(chi)長期處在虧電(dian)狀態,縮短蓄電(dian)池(chi)壽(shou)命,同(tong)時(shi)也浪費不(bu)必要的(de)(de)投資。
可(ke)用一種簡單方法(fa)確(que)定它們之間的(de)關(guan)系,即太陽(yang)能電(dian)(dian)池(chi)(chi)功率必須(xu)比(bi)負載功率高出4倍以(yi)(yi)上,系統才能正(zheng)常工作。太陽(yang)能電(dian)(dian)池(chi)(chi)的(de)電(dian)(dian)壓要(yao)超過蓄電(dian)(dian)池(chi)(chi)的(de)工作電(dian)(dian)壓20~30%,才能**給蓄電(dian)(dian)池(chi)(chi)正(zheng)常充電(dian)(dian)。蓄電(dian)(dian)池(chi)(chi)容(rong)量必須(xu)比(bi)負載日耗量高6倍以(yi)(yi)上為(wei)宜。太陽(yang)能LED路(lu)燈對所用蓄電(dian)(dian)池(chi)(chi)組的(de)基(ji)本要(yao)求是:
①自(zi)放電(dian)(dian)率低;②使用壽(shou)命長;③深放電(dian)(dian)能(neng)力強;④充(chong)電(dian)(dian)效率高(gao);⑤少維護或免維護;⑥工作溫度(du)范(fan)圍寬;⑦價格(ge)低廉(lian)。