Off-Grid Solar Energy and Storage Planning

Size whole PV modules for a daily load and recharge target, then track chronological battery SOC, unmet load and curtailed energy within operating limits.

Compare PV DC/AC nameplate ratio, simultaneous AC watts and VA, timed peak ratings and the actual battery-voltage and current envelope.

Look up NASA POWER monthly horizontal solar climatology by coordinates, preview and explicitly apply the data, or summarize a documented manual monthly series.

Convert daily solar irradiation into equivalent peak-sun-hours or integrate measured irradiance intervals; preserve the actual plane and period.

Size nominal battery Wh and Ah from AC/DC loads, conversion losses and the actual SOC window; compare finite whole-unit series and parallel arrangements.

Calculate charge used between states of charge and record equivalent full discharges from measured throughput; keep capacity basis and limits explicit.

Check MPPT or PWM input voltage, short-circuit current, operating current and battery charging constraints; separate output clipping from input-limit failures.

Correct module Voc and Vmp at design temperatures and find whole series/parallel strings within startup, MPPT, absolute-voltage and current limits.

Compare documented cable candidates for loop voltage drop, loss, adjusted ampacity, terminal current and maximum circuit voltage without a fallback gauge.

Estimate instantaneous PV power from operating conditions or integrate actual AC intervals; keep module temperature, inverter clipping and energy separate.

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Value self-used solar and exported energy with their own rates, realizable credits and additional charges; retain the actual tariff assumptions.

Evaluate dated annual solar cash flows or an explicit escalation scenario, including replacements, discounting and recovery that can reverse later.

Calculate an explicit annual-decline energy scenario or annualized change between normalized measurements; handle zero decline, zero output and measured growth.

Value recoverable soiling losses for an entered period using the correct clean or soiled energy baseline, self-use, export credits and cleaning cost.