The offline reference and toolkit for the people who keep solar farms running: commissioning and O&M technicians on 1500 volt DC plants. NEC calculators with worked steps and citations, cross vendor inverter fault codes, tracker procedures, PLC and SCADA and protection references, and site paperwork that becomes clean PDFs. Built for plants with zero cell signal: everything works offline, forever.
The solar industry never standardized its field knowledge. FieldWatt consolidates it and puts it in your pocket, no signal required.
Max and min string sizing, conductor ampacity with derates, fuse and OCPD limits, voltage drop, insulation resistance thresholds. Every result shows the formula, the worked steps, and the code citation for your selected NEC year.
SMA Sunny Central, Sungrow, and TMEIC central inverter fault codes with the safe response for each, plus combiner O&M, NEXTracker and Array Technologies procedures, and ANSI protection device numbers.
The hard to find stuff: Modbus and RS 485 troubleshooting, register map gotchas, DNP3, SunSpec, PLC status lights, Ignition tag quality, power plant controller behavior, and how to tell a real fault from a comms artifact.
Decision trees for an inverter offline, an underperforming block, a ground fault, and a device that dropped out of SCADA. Safety critical findings render red with a stop work posture, never a blind reset.
LOTO permits, energized work permits, switching orders, JHAs, commissioning records, tracker PM, work orders, and safety checklists. Photos, signatures, and crew sign in, autofilled from your company and site profiles.
Scan a receipt in the truck: on device OCR reads the vendor, amount, date, and category, tags who sent it in and the job number, and emails a clean PDF to the office and to you when signal returns.
Solar farms sit in fields with no coverage. Every reference, calculator, form, and tree ships inside the app. Outgoing email queues until you find signal.
A bright high visibility theme for direct sunlight, a dark theme for early switching, big tap targets, big readable numbers, minimal typing.
No account, no server, no analytics, no ads, no tracking. Your site data stays on your device. The only network use is the App Store and the emails you choose to send.
FieldWatt is a field aid, not a substitute for the NEC, NFPA 70E, the site PE stamped drawings, the authority having jurisdiction, or manufacturer manuals. Safety critical faults require a qualified person.