3200W 24V Workshop Solar Wiring Diagram with Battery (4S2P)
Computed 3200W 24V workshop solar diagram: 4S2P array, wire gauges, OCPD, battery arrangement, routed parts and printable files.
View the scalable diagram inline
What this computed plan shows
The 3200W 24V Workshop Solar Wiring Diagram with Battery (4S2P) turns a searched-for workshop idea into one internally consistent DC schematic. Its 3,200 W array uses 8 modules in 4S2P, so the drawing labels the array at 164 Vmp and 20.4 Isc rather than relying on a generic icon. The result is a planning reference for comparing real equipment ratings before installation.
A MPPT device is shown because the array and bank operate at different useful voltage points. The engine calculates 166.7 A of required controller output and tests 247.5 V against a 300 V input rating. These limits should be matched to a manufacturer datasheet, including its temperature assumptions.
Conductor results change from one section of the 3200W 24V Workshop Solar Wiring Diagram with Battery (4S2P) to the next. Across 35 ft, the PV side selects 8 AWG copper at 1.06% drop; across 9 ft, the charging side selects 4/0 AWG copper at 0.61%. Their respective 35 A and 175 A devices are listed separately so one rating is never copied into the other circuit.
The battery table translates 4 individual 120 Ah units into a 2S2P bank. In this 24 V design, the result is 240 Ah and 6,144 Wh of nominal storage. Usable energy will be lower and depends on chemistry limits, temperature, battery management and the connected load profile.
At the final DC segment, the current rises to 111.1 A for a 2,400 W inverter. The page assigns 3/0 AWG copper to the 5 ft route, with 150 A OCPD and 0.35% calculated drop. Termination ratings and the inverter maker’s fuse instructions remain controlling.
The generated SVG, PNG and tables intentionally repeat the same computed labels so discrepancies are visible during review. If a purchased controller, battery or inverter differs from the values above, regenerate the design from the linked machine before wiring. This workshop example is not a permit set and does not replace equipment instructions or a qualified local professional.
For later comparison, keep the 3,200 W array, 2S2P bank and the 35/9/5 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 | 31.8 A | 35 ft | 8 AWG copper | 1.06% | 156% of array Isc (NEC 690.8) |
| controller → battery | 133.3 A | 9 ft | 4/0 AWG copper | 0.61% | controller output at 125% continuous-load ampacity |
| battery → inverter | 111.1 A | 5 ft | 3/0 AWG copper | 0.35% | inverter continuous DC input at 90% efficiency and 125% ampacity |
Overcurrent protection
| Protected segment | Required ampacity | OCPD | Conductor ampacity | Verdict |
|---|---|---|---|---|
| array → controller | 31.8 A | 35 A | 40 A | within |
| controller → battery | 166.7 A | 175 A | 195 A | within |
| battery → inverter | 138.9 A | 150 A | 165 A | within |
Battery arrangement
| Arrangement | Chemistry | Units | Unit capacity | Bank capacity | Nominal energy | Nominal voltage |
|---|---|---|---|---|---|---|
| 2S2P | LiFePO₄ | 4 | 120 Ah | 240 Ah | 6,144 Wh | 24 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 4S2P 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 35 ft, 9 ft and 5 ft runs shown here.
- Build complete battery strings: Arrange all 4 battery units as 2S2P; do not leave a partial series string in a 24 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 2,400 W inverter.
Customize or compare
Open the parent build guide for the surrounding design context, safety notes and installation discussion.