🔌 LCOS / PV string design
dual-mode tool：storage levelized cost (LCOS)(LCOS)estimation，or PV string voltage / MPPT verify and recommend string count。
estimation result
— yuan/kWh
per-cycle discharge—
annual discharge—
total lifetime discharge—
— modules/string(recommended)
low temperature Voc (most stringent condition)—
MPPT minimum string count—
single-string power—
—
formula：per-cycle discharge = capacity×DOD×efficiency；annual discharge = per cycle×annual cycles；total discharge = year×project life；LCOS = (total investment + O&M×project life) ÷ total discharge。
formula：low temperature Voc = Voc×(1 + β×(Tmin−25))（voltage rises at low temperature）；single-string upper limit = floor(inverter maximum voltage ÷ low temperatureVoc)；MPPT lower-limit string count = ceil(MPPTlower limit ÷ Vmp)。must simultaneously satisfy the voltage upper limit and MPPT range。