4800W 48V Off-Grid Cabin Solar Wiring Diagram Printable (4S3P)
Computed 4800W 48V cabin solar diagram: 4S3P array, wire gauges, OCPD, battery arrangement, routed parts and printable files.
View the scalable diagram inline
What this computed plan shows
Built around a 4,800 W array, the 4800W 48V Off-Grid Cabin Solar Wiring Diagram Printable (4S3P) is a computed answer to the demand phrasing “off grid cabin.” The diagram shows 12 modules as 4S3P, not an unspecified bank of panels, and it carries 198 Voc plus 29.3 operating amps into the controller review. Every table on this page describes that same state.
The MPPT controller needs at least 125 A of output capacity. Its PV input must also remain above the engine’s 247.5 V cold-design check, while the configured ceiling is 300 V. That margin matters because the diagram’s 198 V nameplate value is not the final controller comparison value.
Starting at the roof or rack, 6 AWG copper covers the 20 ft PV run with 0.57% drop and a 50 A protective device. The controller-to-bank segment is shorter at 7 ft, yet its 100 A design current calls for 1/0 AWG copper and 125 A OCPD. Distance and current are both visible because either can determine conductor size.
A 4S2P layout keeps every battery in a complete 48 V string. Using 8 AGM units at 120 Ah each yields 240 bank amp-hours and 11,520 nominal watt-hours. Parallel paths still need equal cable geometry, suitable disconnecting means and manufacturer-approved protection.
The battery-to-inverter path is only 2 ft, but it carries 133.1 A continuously in the calculation. That combination selects 4/0 AWG copper and 175 A protection while retaining 0.07% drop. The 11,500 W surge figure should be compared with motor or compressor starting loads separately from continuous power.
Use the parts links as a routed specification checklist, not permission to substitute unlike ratings. Before buying, confirm controller voltage, breaker interrupt rating, conductor insulation, terminal temperature class, battery series approval and inverter DC range. The customizer carries this exact 4800W 48V Off-Grid Cabin Solar Wiring Diagram Printable (4S3P) state in its URL hash so run lengths or nameplate values can be changed without editing the static drawing.
For later comparison, keep the 4,800 W array, 4S2P bank and the 20/7/2 ft one-way routes together when requesting equipment quotes or an inspection review.
Wire, protection and battery schedules
Wire schedule
| Segment | Design current | One-way run | Computed conductor | Voltage drop | Sizing basis |
|---|---|---|---|---|---|
| array → controller | 47.7 A | 20 ft | 6 AWG copper | 0.57% | 156% of array Isc (NEC 690.8) |
| controller → battery | 100 A | 7 ft | 1/0 AWG copper | 0.36% | controller output at 125% continuous-load ampacity |
| battery → inverter | 133.1 A | 2 ft | 4/0 AWG copper | 0.07% | inverter continuous DC input at 90% efficiency and 125% ampacity |
Overcurrent protection
| Protected segment | Required ampacity | OCPD | Conductor ampacity | Verdict |
|---|---|---|---|---|
| array → controller | 47.7 A | 50 A | 55 A | within |
| controller → battery | 125 A | 125 A | 125 A | within |
| battery → inverter | 166.4 A | 175 A | 195 A | within |
Battery arrangement
| Arrangement | Chemistry | Units | Unit capacity | Bank capacity | Nominal energy | Nominal voltage |
|---|---|---|---|---|---|---|
| 4S2P | AGM | 8 | 120 Ah | 240 Ah | 11,520 Wh | 48 V |
Static routed parts list
Parts are computed from this passing configuration. A route appears only when the verified catalogue record proves every displayed numeric rating; all uncertain matches stay local for verification. Routed links may earn Off Grid Authority a commission at no extra cost to you.
Pre-install review steps
- Confirm the array and controller window: Verify that the 4S3P string plan produces 198 V open circuit and that the equipment is rated above the 247.5 V cold-design value.
- Lay out the protected DC runs: Measure the one-way paths before ordering cable, then compare them with the computed 20 ft, 7 ft and 2 ft runs shown here.
- Build complete battery strings: Arrange all 8 battery units as 4S2P; do not leave a partial series string in a 48 V bank.
- Commission against equipment instructions: Check polarity, terminal torque, DC interrupt ratings, conductor temperature ratings, ambient correction and local inspection requirements before energizing the 5,750 W inverter.
Customize or compare
Open the parent build guide for the surrounding design context, safety notes and installation discussion.