Source: https://guthlabs.ai/docs/instrument-workflows/solar-offgrid/

instrument chain / verified-workflow-definition

# Off-Grid Solar Designer

Load to panels to controller to battery bank.

Status: **observed**Lifecycle: **verified-workflow-definition**

## Goal

Load to panels to controller to battery bank.

## Instrument chain

- 01

**[Electricity Cost of Appliance Calculator](<https://guthlabs.ai/docs/instruments/electricity-cost-of-appliance-calculator/>)**

load audit

VERIFIED

- 02

**[Solar PV Array Sizing Calculator](<https://guthlabs.ai/docs/instruments/solar-pv-array-sizing-calculator/>)**

array

VERIFIED

- 03

**[Solar Charge Controller Sizing (PWM/MPPT)](<https://guthlabs.ai/docs/instruments/solar-charge-controller-sizing-pwm-mppt/>)**

controller

VERIFIED

- 04

**[Off-Grid Battery Bank Sizing (Solar)](<https://guthlabs.ai/docs/instruments/off-grid-battery-bank-sizing-solar/>)**

storage

VERIFIED

- 05

**[Battery Pack Series/Parallel Configurator](<https://guthlabs.ai/docs/instruments/battery-pack-series-parallel-configurator/>)**

pack build

VERIFIED

- 06

**[Battery Charge Time Estimator](<https://guthlabs.ai/docs/instruments/battery-charge-time-estimator/>)**

recharge

VERIFIED

- 07

**[Battery Capacity / C-Rate / Runtime Calculator](<https://guthlabs.ai/docs/instruments/battery-capacity-c-rate-runtime-calculator/>)**

runtime check

VERIFIED

## Handoffs and cross-checks

Daily Wh → array W → controller A (Isc×1.25) → bank Ah (DoD, autonomy) → pack S/P.

## PointGuard stance

Voc cold-corrected must clear the controller limit with margin; equality is a FAIL (the t4-162 boundary convention).

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `INSTRUMENT_COMBOS.json`

- `VERIFIED_LEDGER.json`