Built by Builders, for Builders.
We started ManualsFix after spending years building campervans, setting up off-grid solar arrays, and running 3D printing workshops. In short, we got completely fed up with fluff-filled articles that never give you the actual formula or numbers you need.
Our Core Philosophy
When you're standing in a hardware store holding a spool of copper wire or troubleshooting a failing 3D print late at night, you don't want a 2,000-word introductory essay. You want a tool where you plug in three numbers and immediately see the right answer with zero hassle.
Every calculator on ManualsFix runs 100% inside your browser. No signups, no paywalls, no newsletters forced down your throat, and zero data harvested from your calculations.
Our Engineering Standards
We don't pull random numbers out of thin air. Our calculation engines rely on verified, peer-reviewed engineering standards:
- NEC & ABYC: Wire gauge and voltage drop formulas follow National Electrical Code 310.15 and ABYC E-11 standards for 105°C marine-grade copper.
- NREL Data: Solar irradiance figures use empirical photovoltaic research from the National Renewable Energy Laboratory.
- Material Datasheets: Filament densities and CNC chip loads are derived from verified manufacturer technical datasheets (TDS).
Meet the Editorial & Technical Team
Hands-on practitioners with over 15 combined years of off-grid fabrication experience.
Marcus Vance
Overland system builder with 9+ years designing custom 12V/24V off-grid lithium electrical setups for Sprinters, Transits, and remote cabins.
Elena Rostova
Mechanical designer with a background in CNC machining and additive manufacturing. Operator of an 8-printer print lab specializing in technical polymers (PETG, ASA, PA-CF).
Engineering Benchmark Reference
| Application Field | Primary Standard | Safety Margin Applied | Algorithm Location |
|---|---|---|---|
| Solar PV Array | NREL Irradiance Data | 1.25x Controller Safety Factor | Client-side JavaScript (ES6) |
| DC Conductor Sizing | NEC Chapter 9 Table 8 | ≤ 3% Voltage Drop Threshold | Client-side JavaScript (ES6) |
| Lithium Battery Storage | Manufacturer Cycle Datasheets | 80% Depth-of-Discharge (DoD) Limit | Client-side JavaScript (ES6) |
| CNC Speeds & Feeds | Machinery's Handbook (31st Ed.) | Conservative 70% Tool Deflection Limit | Client-side JavaScript (ES6) |
Editorial & Engineering Review Policy
At ManualsFix, technical accuracy is paramount. Every calculator formula, standard derating factor, and reference chart undergoes a rigorous multi-stage peer verification process before deployment:
- 1. Source Verification: Algorithms are directly mapped to authoritative published engineering standards (NEC 310.15, ABYC E-11, NREL PV irradiance, ISO additive manufacturing guidelines).
- 2. Bench Testing: Calculations are compared against empirical bench test measurements taken from live electrical van setups and calibrated 3D print operations.
- 3. Independent Expert Review: Content and code are reviewed by certified solar PV specialists and mechanical engineering consultants.
- 4. Continuous Correction Policy: If an electrical code revision or manufacturer datasheet update occurs, formulas are refreshed within 48 hours. Users can report technical anomalies via our contact form.
Have feedback or a tool suggestion?
We are constantly improving our algorithms and adding requested presets based on builder input.
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