Generac BOM Generator

Google Gemini API Key

Get key at aistudio.google.com/apikey

Battery / Storage

Auto-detected from planset.

PWRmicro is AC-coupled — works with any existing battery. PWRcell 2 included if shown on planset.

Optional Accessories

Leveling Feet (ground mount)

External CT Kit (split phase)

Upload

Drop your planset here

PNG, JPG, PDF, Excel, Word

Extracted Project Data

Step 2: Cable & Configuration — Review Your Planset

DC Cables — How to decide from planset AUTO

1 Long + 1 Short

  Panel A     Panel B
  [===J===] [===J===]
      \       /
  short\ /long
     [MICRO]

Best for: Portrait panels

Micro centered under 2 panels. One J-box is close (short 380mm), other is far (long 1010mm).

2 Long (Safe Default)

Panel A      Panel B
[====J====][====J====]
     \         /
  long \   / long
      [MICRO]

Best for: Landscape or unsure

Both J-boxes are far from micro center. Also use this if you can't tell from planset.

2 Short (Close Mount)

  [Panel A] [Panel B]
   [==J==]   [==J==]
     \         /
 short \   / short
      [MICRO]

Best for: Portrait, micro near J-boxes

Both panel J-boxes are within 380mm (~15in) of micro. Rare — only when micro is mounted very close.

AC Trunk Cable — Measure distance between adjacent micros AUTO

Small 1.2m (47.2in)

Portrait 60-cell panels

Micro-to-micro gap < 47in. Typical with portrait-mounted ~40in-wide panels + small gap.

Medium 2.0m (78.7in)

Landscape 60-cell / Portrait 72-cell

Micro-to-micro gap 47-78in. Common with landscape-mounted standard panels.

Large 2.35m (92.5in)

Landscape 72-cell / Large panels

Micro-to-micro gap > 78in. Use when unsure — never wrong to go bigger.

How to measure from planset: Distance = panel width in installed orientation + gap between panels. Example: 41in panel (portrait) + 2in gap = 43in → Small. If landscape: 69in panel + 2in gap = 71in → Medium.

J-Box Termination Side

Check planset — which side does the last micro in each string connect to the combiner? Default Left if not clear.

Detected Battery

None detected

From planset. PWRmicro is AC-coupled and compatible with any existing battery.

Include detailed analysis report Optional - BOM is always generated

Electricity Rate ($/kWh): US avg ~$0.16 | CA ~$0.32 | TX ~$0.13 | PR ~$0.27

Notes

Step 1 — Project & Solar Configuration

1

Project Info

Project Name

Dealer / Installer

Location (city, state/zip)

2

Panel Specs

Number of Panels

Panel Brand

Panel Model

3

Array & Cables

Solar Inverter

Strings

Roof Diagram Mode

Panel Orientation

Trunk Cable Size

DC Cables

J-Box Termination

Existing Battery

Leveling Feet (ground mount)

External CT Kit (split phase)

System Preview

Configure your system above to see preview

Step 2 — Battery Configuration

Choose Your Battery Configuration

✓

GRID-TIED

No Battery

Solar only, grid-tied

$0.00

PWRmicro solar only
No battery storage
Grid-tied operation

✓

CURRENT

Keep Existing Battery

No existing battery selected

$0.00

Solar equipment only
PWRmicro is AC-coupled
Works with any existing battery
No additional battery cost

✓

UPGRADE

Add PWRcell 2 System

11.5 kW Inverter + Battery + SDS

$0.00

Battery Capacity:

Full Generac battery system
PWRcell 2 Inverter: 11.5 kW / 236 LRA
Smart Disconnect Switch included
Whole-home backup capable

Step 3 — Generate

Include detailed analysis report Circuit detail, production estimates, compatibility

Electricity Rate ($/kWh): US avg ~$0.16 | CA ~$0.32 | TX ~$0.13 | PR ~$0.27

Notes

📁 My Saved Projects

📋 Example Plansets

Real-world plansets showing how the BOM Generator processes solar designs. Download, upload, or run a BOM Analysis demo to see the tool in action.

🏠

Guaynabo Residential — VSUN 410W

15-panel VSUN 410W system in Guaynabo, PR. Franklin WH aPower battery + aGate X transfer switch. Existing Duracell D700-M2 microinverters replaced with Generac PWRmicro.

Panels: 15

Battery: Franklin

Format: PDF

📄 View Planset ⬇ Download

⚡

Dave Jones — Electrical Plans

Full electrical plan set (E-01, E-02, E-03) for a residential solar installation. Includes electrical schedules, wiring diagrams, and panel specifications.

Sheets: E-01 to E-03

Type: Electrical

Format: PDF

📄 View Planset ⬇ Download

📐 Design Rules & Notes

Current engine rules and collaborative notes. Review the system rules below, then add observations or suggestions for the engineering team.

⚙️ Current Engine Rules

PWRmicro PM-820

Max Panel Wattage

500W max per input — dual-input (2 panels per micro)

PWRmicro PM-820

Voltage Limits

Max Voc: 70V | Operating: 24–65V | MPPT: 31–42.5V | Start: 22.5–51V

PWRmicro PM-820

Current Limits

Max Isc per input: 18A | Max DC short-circuit: 21A

PWRmicro PM-820

AC Output

820VA @ 240V | CEC efficiency: 97.0% | Peak: 97.3%

PWRmicro PM-820

Branch Circuit Limits

Max 7 micros per 30A branch @240V | Max 6 @208V

Wiring

Micro-to-Panel Ratio

1 micro per 2 panels (ceil) — odd panel gets DC seal cap on unused input

Wiring

AC Trunk Cable Sizes

Small: 1.2m ($20.12) | Medium: 2.0m ($24.69) | Large: 2.35m ($27.61)

Wiring

DC Cable Modes

Standard: 1 Long + 1 Short per micro | Conservative: 2 Long | Portrait: 2 Short

Wiring

Auto Cable Selection

Portrait → Standard DC + Small trunk | Landscape → Conservative DC + Medium trunk

Wiring

Trunk Cable Count

(micros per string − 1) trunks per string, summed across all strings

Wiring

Seal Caps & Terminations

1 AC Male cap + 1 J-Box per string | DC Male caps = (micros×2) − panels

Combiner

Smart Combiner

1 per system — supports up to 28 micros max ($817.23)

PWRcell 2 Inverter

Rated Output

11.5 kW @ 240V | Max continuous: 48A | OCPD: 60A | CEC: 98.5%

PWRcell 2 Inverter

DC Input

Voltage: 400V (range 360–420V) | Max DC current: 34A

PWRcell 2 Inverter

System Limits

Max AC-coupled PV: 15 kW | Max 2 inverters (23 kW) | Max 4 cabinets total

PWRcell 2 Inverter

Non-PWRmicro Systems

Enphase/SolarEdge/Other → battery-only BOM, no solar cabling, auto-includes PWRcell 2 + 15 kWh

Battery

Module Specs

NMC chemistry | 3.0 kWh per module | 46.8V nominal | 55 lbs each

Battery

Cabinet Configuration

Min 3, max 6 modules per cabinet | Max 2 cabinets per inverter

Battery

Spacer Kit Rule

Required for M3 or M5 configs (3 or 5 modules per cabinet)

Battery

Power by Config

M3: 5.2 kW / 65A LRA | M4: 7.0 kW / 87A | M5: 8.7 kW / 108A | M6: 10.5 kW / 130A

Battery

Ferrite Core Kit

Always required (1 per system) — needed when no metal conduit used

Smart Disconnect

SDS Specs

Max backup: 200A | Transfer: <50ms | Max PV breaker: 60A | Max gen: 28 kW

Smart Disconnect

AC PV Limit Check

Total micro AC output must not exceed 15 kW — warns if exceeded

Production

Solar Estimate Parameters

Peak sun hours: 5.3h (default) | System losses: 14% | Rate: user-configurable (US avg $0.16/kWh)

Production

Minimum System Size

Min 2 panels for PWRmicro system | Validates Voc, Isc, wattage before BOM

💬 Team Notes & Suggestions

➕ Add New Rule / Note

⚡ Admin Dashboard

💚

Generac BOM Generator

PWRmicro + PWRcell 2 — Platinum Pricing Engine

This tool was built with love and dedication by a Generac fan who believes in the power of clean energy and great engineering.

The goal is simple: make it fast, easy, and accurate to generate Bills of Materials for Generac PWRmicro solar + PWRcell 2 battery systems — with real Platinum pricing, intelligent cable selection, and detailed analysis reports.

We hope the engineering community will collaborate to improve this tool over time. Use the Design Rules tab to share observations, suggest improvements, and help refine the BOM engine for everyone.

Together, we make solar better. ☀️

Generac Ecosystem Community Driven Made with ❤️ Open Collaboration

Created by

Pedro Vega

pjvolta.com

Solar Energy Enthusiast & Generac Advocate

Version 2.0 — Built for the solar community 🌎

🔐 BOM Generator

Create Account

BOM Generator

Google Gemini API Key

Battery / Storage

Optional Accessories

Drop your planset here

Extracted Project Data

Step 2: Cable & Configuration — Review Your Planset

Project Info

Panel Specs

Array & Cables

Choose Your Battery Configuration

📁 My Saved Projects

📋 Example Plansets

Guaynabo Residential — VSUN 410W

Dave Jones — Electrical Plans

📐 Design Rules & Notes

⚙️ Current Engine Rules

💬 Team Notes & Suggestions

➕ Add New Rule / Note

⚡ Admin Dashboard

Generac BOM Generator

⚙️ Profile Settings

🔐 BOM Generator

Create Account

BOM Generator

Google Gemini API Key

Battery / Storage

Optional Accessories

Drop your planset here

Extracted Project Data

Step 2: Cable & Configuration — Review Your Planset

Project Info

Panel Specs

Array & Cables

Choose Your Battery Configuration

📁 My Saved Projects

📋 Example Plansets

Guaynabo Residential — VSUN 410W

Dave Jones — Electrical Plans

📐 Design Rules & Notes

⚙️ Current Engine Rules

💬 Team Notes & Suggestions

➕ Add New Rule / Note

⚡ Admin Dashboard

Generac BOM Generator

⚙️ Profile Settings

PWRmicro Placement