Mike Swanson
aaf4172b3c
New projects from 2026-02-09 research session: Wrightstown Solar: - DIY 48V LiFePO4 battery storage (EVE C40 cells) - Victron MultiPlus II whole-house UPS design - BMS comparison (Victron CAN bus compatible) - EV salvage analysis (new cells won) - Full parts list and budget Wrightstown Smart Home: - Home Assistant Yellow setup (local voice, no cloud) - Local LLM server build guide (Ollama + RTX 4090) - Hybrid LLM bridge (LiteLLM + Claude API + Grok API) - Network security (VLAN architecture, PII sanitization) Machine: ACG-M-L5090 Timestamp: 2026-02-09 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
123 lines
4.2 KiB
Markdown
123 lines
4.2 KiB
Markdown
# Wrightstown Solar - Parts List & Budget
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**Created:** 2026-02-09
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**Status:** Draft -- prices are estimates, verify before purchasing
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---
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## Phase 1: First 5kWh Pack + Victron System
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### Inverter & Control
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| Component | Qty | Est. Unit | Est. Total | Notes |
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| Victron MultiPlus II 48/5000/70-50 | 1 | $1,400-1,800 | $1,400-1,800 | 4kW continuous, 9kW peak, <20ms transfer |
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| Cerbo GX | 1 | $320-350 | $320-350 | System brain, DVCC, VRM monitoring |
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| GX Touch 50 (optional) | 1 | $150-180 | $150-180 | Touchscreen for Cerbo (or use HDMI) |
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### Battery Pack (16S5P)
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| Component | Qty | Est. Unit | Est. Total | Notes |
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|---|---|---|---|---|
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| EVE C40 20Ah cells (Grade A, matched) | 80 | $3-5 | $240-400 | Verify test data from supplier |
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| JK BMS B2A8S20P 150A | 1 | $80-150 | $80-150 | 2A active balancing, 16S |
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| USB-UART cable | 1 | $15 | $15 | JK BMS to Cerbo GX connection |
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| 40135 cell holders | Set | $20-40 | $20-40 | Cylindrical cell mounting |
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| Nickel/copper bus bars | Set | $20-40 | $20-40 | Cell interconnects |
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| Battery enclosure | 1 | $30-60 | $30-60 | Ventilated, insulated |
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| Class T fuse + holder (150A) | 1 | $20-30 | $20-30 | DC protection |
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| DC disconnect switch | 1 | $20-40 | $20-40 | Isolation between battery and inverter |
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| Battery cables (2/0 AWG or similar) | Set | $30-50 | $30-50 | Battery to inverter |
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| Terminal lugs, heat shrink, misc | Set | $20-30 | $20-30 | Assembly supplies |
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### Electrical / Installation
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| Component | Qty | Est. Unit | Est. Total | Notes |
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| Sub-panel (if separating critical loads) | 1 | $50-100 | $50-100 | Or use existing panel |
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| AC breakers | 2-3 | $10-15 | $20-45 | Input and output protection |
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| AC wiring (10 AWG or per code) | Lot | $30-50 | $30-50 | Grid to Victron to panel |
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| Generator inlet (if adding generator) | 1 | $30-60 | $30-60 | NEMA L14-30 or similar |
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| Mounting hardware | Lot | $20-30 | $20-30 | Wall mount for Victron, battery shelf |
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### Phase 1 Total
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| Category | Low Est. | High Est. |
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| Inverter & Control | $1,720 | $2,330 |
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| Battery Pack | $475 | $855 |
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| Electrical / Install | $150 | $285 |
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| **Phase 1 Total** | **$2,345** | **$3,470** |
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## Phase 2-4: Additional 5kWh Packs (x3)
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### Per Additional Pack
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| Component | Qty | Est. Unit | Est. Total |
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| EVE C40 20Ah cells | 80 | $3-5 | $240-400 |
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| JK BMS B2A8S20P 150A | 1 | $80-150 | $80-150 |
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| Cell holders, bus bars | Set | $40-80 | $40-80 |
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| Enclosure | 1 | $30-60 | $30-60 |
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| Fuse, disconnect, cables | Set | $40-70 | $40-70 |
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| **Per Pack Total** | | | **$430-760** |
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### All 3 Additional Packs
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| | Low Est. | High Est. |
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| 3x additional packs | $1,290 | $2,280 |
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## Full System Total (20kWh)
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| Phase | Low Est. | High Est. |
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| Phase 1 (5kWh + Victron) | $2,345 | $3,470 |
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| Phases 2-4 (15kWh additional) | $1,290 | $2,280 |
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| **Complete 20kWh System** | **$3,635** | **$5,750** |
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### Cost Per kWh: $178-281/kWh (all-in, including inverter)
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### Battery-only cost: $86-153/kWh
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## Supplier Notes
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### EVE C40 Cells
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- **Source Grade A matched cells** with test data showing capacity and internal resistance
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- Reputable suppliers: EEL Battery, SeLian Energy, direct AliExpress sellers with good reviews
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- Verify cells are genuine EVE (counterfeits exist)
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- Order 5-10% extra cells for replacements and matching
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### JK BMS
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- Amazon (JKBMS official store) for faster shipping, slightly higher price
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- AliExpress for best price, slower shipping
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- Specify 150A version, 16S, with Bluetooth + RS485
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### Victron Equipment
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- Authorized Victron dealers for warranty
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- Signature Solar, altE Store, Battery Hookup (US dealers)
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- Check for bundle pricing (MultiPlus + Cerbo)
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## Tools Needed
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| Tool | Purpose | Own/Buy |
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| Multimeter | Cell testing, wiring verification | Essential |
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| Spot welder or compression fittings | Cell connections | Depends on bus bar choice |
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| Wire crimper (hydraulic for large lugs) | Battery cables | Essential |
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| Torque wrench | Bus bar connections | Recommended |
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| Heat gun | Heat shrink tubing | Essential |
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| Insulated tools | Working near battery | Essential for safety |
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| Class D fire extinguisher | Lithium battery safety | Essential |
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| Safety glasses, gloves | Assembly PPE | Essential |
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