VoltPlan Wiring Diagrams

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Generate 12V/24V/48V wiring diagrams and size wires, fuses, batteries, solar, and inverters.

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Copy this into your MCP client config:

{
  "mcpServers": {
    "VoltPlan Wiring Diagrams": {
      "url": "https://mcp.voltplan.app/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (9)

• generate_wiring_diagram

  Generate an electrical wiring diagram for campers, boats, or off-grid setups. Returns a complete schematic with batteries, chargers, protection components, and loads. Protection components (shunt, main switch, low-voltage cutoff) are auto-generated when both batteries and loads are provided.

  Parameters:

  • systemName (required) — string — Name of the electrical system (e.g. "My Camper Van")
  • loads — array — Electrical loads / consumers
  • format — string — Output format: svg (recommended, renders inline) or png (base64-encoded image, may not display in all clients)
  • chargers — array — Chargers with their power sources
  • batteries — array — Batteries in the system

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• list_component_types

  List all available component types and example configurations for building wiring diagrams. Use this to understand what parameters are needed before calling generate_wiring_diagram.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• calculate_wire_gauge

  Calculate the recommended wire gauge / cable cross-section for a DC circuit. Considers both ampacity (current carrying capacity) and voltage drop to recommend the optimal cable size. Also returns total resistance, power loss, and a fuse recommendation. Supports copper conductors from 0.75 mm² (18 AWG) to 240 mm² (300 MCM).

  Parameters:

  • voltage (required) — number — System voltage in volts (e.g. 12, 24, 48)
  • cableLengthM (required) — number — One-way cable length in meters
  • power — number — Load power in watts. Will be converted to current using the voltage. Provide either current or power.
  • current — number — Load current in amps. Provide either current or power.
  • isRoundTrip — boolean — Account for both positive and negative conductor (default: true). Set to false for chassis-ground returns.
  • temperatureCelsius — number — Ambient temperature in °C (default: 20°C). Affects copper resistance.
  • maxVoltageDropPercent — number — Maximum acceptable voltage drop in percent (default: 3%)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• calculate_power_budget

  Calculate total daily energy consumption from a list of electrical loads. Each load specifies its power draw, how many hours per day it runs, and quantity. Returns total daily energy (Wh and Ah), peak power draw, and average power. This is typically the first step in sizing a battery bank and solar system.

  Parameters:

  • systemVoltage (required) — number — System voltage in volts (e.g. 12, 24, 48)
  • loads (required) — array — List of electrical loads to include in the budget

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• calculate_battery_bank

  Calculate the recommended battery bank size based on daily energy consumption. Accounts for days of autonomy (how many days without charging) and depth of discharge. Returns required capacity, number of batteries, and wiring configuration.

  Parameters:

  • dailyConsumptionWh (required) — number — Daily energy consumption in watt-hours (from calculate_power_budget)
  • systemVoltage (required) — number — Target system voltage in volts (e.g. 12, 24, 48)
  • singleBatteryAh (required) — number — Capacity of a single battery in amp-hours (e.g. 100, 200)
  • singleBatteryVoltage (required) — number — Voltage of a single battery (e.g. 12.8 for LiFePO4, 12 for lead-acid)
  • daysOfAutonomy — number — Days the system should run without any charging (default: 2)
  • depthOfDischargePercent — number — Usable percentage of battery capacity. LiFePO4: 80-90%, AGM: 50%, Gel: 50% (default: 80)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• calculate_solar_size

  Calculate the required solar panel wattage to cover daily energy consumption. Accounts for peak sun hours at the location and system efficiency losses (MPPT conversion, wiring, temperature derating). Returns required wattage and common panel configurations.

  Parameters:

  • dailyConsumptionWh (required) — number — Daily energy consumption in watt-hours (from calculate_power_budget)
  • peakSunHours (required) — number — Average daily peak sun hours for the location. Examples: Northern Europe winter 1-2h, summer 4-6h. Southern US 5-6h. Equatorial regions 5-7h.
  • systemEfficiency — number — Overall system efficiency factor (default: 0.85). Accounts for MPPT losses, wiring losses, temperature derating, and panel soiling.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• calculate_charging_time

  Estimate how long it takes to charge a battery bank from a given state of charge to a target level. Accounts for the bulk charging phase (constant current, up to ~80% SoC) and the slower absorption phase (tapering current, 80-100% SoC). Works for any charging source: solar, shore power, alternator.

  Parameters:

  • batteryCapacityAh (required) — number — Total battery bank capacity in amp-hours
  • batteryVoltage (required) — number — Battery bank voltage (e.g. 12, 24, 48)
  • currentStateOfChargePercent (required) — number — Current state of charge in percent (e.g. 20 for 20%)
  • chargePowerWatts (required) — number — Charger output power in watts
  • chargeCurrentAmps — number — Maximum charge current in amps (if limited by the charger or battery BMS). If omitted, calculated from power and voltage.
  • targetStateOfChargePercent — number — Target state of charge in percent (default: 100)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• calculate_inverter_size

  Calculate the recommended inverter size for running AC loads from a DC battery system. Accounts for continuous power, startup surge power (motors typically surge 2-3x), and includes a 25% headroom for the continuous rating. Returns the recommended inverter wattage and the DC current draw at system voltage.

  Parameters:

  • systemVoltage (required) — number — DC system voltage (e.g. 12, 24, 48)
  • loads (required) — array — List of AC loads that will run through the inverter

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• calculate_battery_config

  Determine how to arrange batteries in series and/or parallel to achieve a target voltage and capacity. Returns the number of batteries needed, the wiring configuration (e.g. 2S3P), and step-by-step wiring instructions.

  Parameters:

  • targetVoltage (required) — number — Desired system voltage (e.g. 12, 24, 48)
  • targetCapacityAh (required) — number — Desired total capacity in amp-hours
  • singleBatteryVoltage (required) — number — Nominal voltage of one battery (e.g. 12.8 for LiFePO4, 12 for lead-acid, 3.2 for LiFePO4 cells)
  • singleBatteryAh (required) — number — Capacity of one battery in amp-hours

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

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