kVA ToolsBETA — PV
Project
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Input — Site Particulars
| Project description | |
| Load criticality | |
| Nominal system voltage (Vdc) |
Solar Resource & A:L
| Peak sun hours (kWh/m²/day) | |
| Array-to-load ratio (A:L) |
A:L guidance — non-critical loads
with high, consistent solar irradiance: 1.1–1.2;
critical loads or low solar irradiance: 1.3–1.4 or
higher. For non-constant monthly loads, re-run using
the worst-case month's sun hours and A:L.
Charge Controller
| MPPT controller efficiency (%) |
Both the shunt/series/PWM and MPPT calculation paths
are reported in parallel for direct comparison, as
in IEEE 1562-2021 Annex D.
Input — From Battery Sizer (PV) IEEE 1013
| Days of autonomy desired | |
| Total daily load (line 5c, Ah/day) | |
| Max battery voltage Vmax (line 8d, Vdc) | |
| Battery capacity (line 12, Ah) | |
| Capacity rated at |
Input — System Losses
| # | Description of system loss | Typical max % | Typical min % | System loss % | Multiplier |
|---|---|---|---|---|---|
| Total system losses (line 7e) | — | — | |||
Input — PV Module Datasheet
| Module manufacturer / model | |
| Imp — max power current (A) | |
| Isc — short-circuit current (A) | |
| Module nominal voltage (Vdc) | |
| Voc — open-circuit voltage (Vdc) | |
| Vmp — max-power voltage (Vdc) | |
| Pmax — STC peak power (W) |
Temperature coefficients
| KT-V (Voc) |
|
| KT-P (Pmax) |
|
| KT-I (Isc) |
|
| Tambient max (°C) | |
| NOCT (°C) |
Output — Operating Conditions
| Tmodule max — operating temperature | — | °C |
| Vmp,new — Vmp at operating temperature | — | Vdc |
| Pmax,new — Pmax at operating temperature | — | W |
| Imp,new — Imp at operating temperature | — | A |
Energy & Losses
| Daily array Ah requirement (line 11) | — | Ah/day |
| Total system losses (line 7e) | — | % |
| Loss factor (1 − σL) (line 12) | — | — |
Output — Shunt / Series / PWM Controller
| Modules in series per string (ns, Eq. 2) | — | modules |
| Parallel strings (Np, Eq. 3) | — | strings |
| Total modules required | — | modules |
Output — MPPT Controller
| Daily load (line 19) | — | Wh/day |
| Per-module daily production (line 20) | — | Wh/day |
| Modules per string (line 23) | — | modules |
| Number of strings (line 24) | — | strings |
| Total modules required (line 25) | — | modules |
Output — Comparison
| Shunt / Series / PWM total | — | modules |
| MPPT total | — | modules |
| Difference | — | modules |
Enter inputs to calculate.