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Ships by freight. This item is too large for parcel delivery. After you order, we'll contact you within 1 business day with the freight cost and delivery options (liftgate, residential). Your order ships only after you approve the quote.
Need installation or sizing help? Call (888) 831-0450 or ask an expert.
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- Choice of EG4 18kPV or FlexBOSS21 hybrid inverter
- Pytes V5 LFP batteries with self-heating
- Outdoor V-BOX cabinet or wall brackets
- Optional GridBOSS MID for whole-home backup
- EG4 inverter 10-year warranty
Ships by LTL freight. Too large for parcel delivery. Questions on freight? Call (888) 831-0450.
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Product Documents
- EG4 FlexBOSS21 Hybrid Inverter Spec Sheet (v1.3.0)
- EG4 GridBOSS MID Spec Sheet (v1.1.8)
- EG4 18kPV Hybrid Inverter Spec Sheet (v1.4.3)
- EG4 18kPV Hybrid Inverter User Manual (v2.7.6)
- EG4 GridBOSS User Manual (MI-200-2P-HYB-AW-03, v2.0.7)
- EG4 18kPV Hybrid Inverter 10-Year Limited Warranty Document (v1.1.0)
- EG4 GridBOSS Warranty Document
- EG4 18kPV Quick-Start Guide
A configurable solar storage system with three Pytes V5 LiFePO4 batteries (15.36kWh total) and your choice of EG4 hybrid inverter. Pick the 18kPV or the FlexBOSS21, choose an outdoor cabinet or wall brackets for the batteries, and optionally add a GridBOSS MID for whole-home energy management. It offers scalable power and smooth integration for hybrid grid-tied systems or off-grid builds.
Highlights
- Pytes V5: 5.12kWh, 51.2V, 100Ah LiFePO4 modules with integrated BMS
- Choice of inverter: 18kPV (12kW) or FlexBOSS21 (16kW with PV)
- Flexible mounting: outdoor V-BOX-OC cabinet or wall brackets
- Optional GridBOSS for smart load control and simpler installs
What's included
- 3× Pytes V5 LiFePO4 battery (5.12kWh, 51.2V, 100Ah each)
- 1× EG4 hybrid inverter: 18kPV or FlexBOSS21 (select above)
- Battery mounting: 1× Pytes V-BOX-OC outdoor cabinet or 6× pairs Pytes V5 brackets (select above)
- Optional: 1× EG4 GridBOSS MID (200A service entrance)
Key specs
| Battery storage | 15.36kWh (3 × 5.12kWh) |
| 18kPV output | 12kW continuous |
| FlexBOSS21 output | 16kW (PV + grid) / 12kW battery-only |
| Output voltage | 120/240V split phase |
Warranty & shipping
- EG4 warranties: 18kPV, FlexBOSS21 and GridBOSS 10 years each. Pytes batteries and racking carry Pytes' manufacturer warranty
- Ships by freight
Solar panels not included. Professional installation is recommended.
| Manufacturer | EG4 Electronics (bundle) |
|---|---|
| Bundle SKU | BNDL-E0024 |
| Battery | Pytes V5 LFP, 5.12kWh / 51.2V / 100Ah each, self-heating |
| Includes | 1x EG4 18kPV Hybrid Inverter (12,000W @ 240VAC (10,400W @ 208VAC); 18,000W (21kW recommended max array); 100-600 VDC) |
| Includes | 3x Pytes V5 LiFePO4 Battery 5.12kWh |
| Includes | 1x Pytes V-BOX-OC Outdoor Cabinet |
| Includes | 1x EG4 GridBOSS MID v3.1 (Microgrid Interconnect Device (MID); 200A service entrance (350A bus, software limited to 200A); 3 x 90A (12kPV, 18kPV, FlexBOSS18, FlexBOSS21)) |
Specifications are from the manufacturer and may change. Questions? Call (888) 831-0450.
EG4 Limited Warranty (per component): 18kPV 10-year limited; GridBOSS 10-year limited
| 18kPV | 10-year limited |
|---|---|
| GridBOSS | 10-year limited |
| How to claim | contact original place of purchase (Sky Solar USA) / EG4 |
Download: EG4 18kPV Hybrid Inverter 10-Year Limited Warranty Document (v1.1.0)
Download: EG4 GridBOSS Warranty Document
Manufacturer warranties are provided by the manufacturer. Keep your invoice as proof of purchase. Questions about a warranty claim? Call (888) 831-0450.
| Inverter Options |
EG4 18kPV Hybrid Inverter, EG4 FlexBOSS21 16kw AC Hybrid Inverter |
|---|---|
| Racking Options |
1 X Pytes V-BOX-OC Outdoor Cabinet, 6 X Pytes V5 LFP Battery Brackets | Pair |
| MID Options |
EG4 GridBOSS MID, NO EG4 GridBOSS MID |