Great app
Very helpful in the field. All in one app. Saves time and money.
Free
In-App Purchases
About
This offline toolkit provides essential calculations and reference material for utility-scale solar plant commissioning and O&M. It includes guided troubleshooting, site paperwork generation, and receipt tracking, all designed for field use.
✓Offline calculations with code citations
✓Central inverter fault code reference
✓Guided troubleshooting decision trees
✓Site paperwork generation (PDFs)
✓Receipt scanning and tracking
✓High visibility and dark themes
✓Crew site logging with geofencing
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What's New in FieldWatt
1.2.7
October 29, 2026
Try FieldWatt Pro free for 7 days on the annual plan. Every calculator, fault code entry, troubleshooting tree and site form is unlocked during the trial, and the Pro screen shows the price that follows it.
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Subscriptions & In-App Purchases
Pro Monthly
All Pro tools, billed monthly.
$14.991 Month
User reviews
Developer apps
FAQ
What is FieldWatt?
FieldWatt is an offline toolkit designed for field technicians working on utility-scale solar plants. It offers calculations, reference materials, troubleshooting guides, and site paperwork generation.
Does FieldWatt work offline?
Yes, FieldWatt is built to work entirely offline. All necessary data and features are included within the app, meaning it functions without any cell signal.
What kind of calculations does FieldWatt offer?
FieldWatt provides calculations for string sizing, DC conductor sizing, fuse and OCPD checks, voltage drop, insulation resistance, and expected output/performance ratio, all with detailed steps and code citations.
Can FieldWatt help with inverter faults?
Yes, FieldWatt includes a reference library of central inverter fault codes across various brands, along with recommended safe responses for each.
What are the subscription options for FieldWatt?
FieldWatt offers a Pro Monthly subscription for $14.99 and a Pro Annual subscription for $119.99, which includes a 7-day free trial.
Does FieldWatt have ads?
No, FieldWatt is ad-free. The app explicitly states 'no ads' and focuses on providing a clean user experience for field technicians.
What devices is FieldWatt compatible with?
FieldWatt is available for iPhone and iPad, supporting iOS devices.
How often is FieldWatt updated?
The latest version of FieldWatt is 1.2.7, and it was last updated on October 29, 2026. Updates typically include new features, bug fixes, and improved performance.
