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6kW 48V Off-Grid Solar Wiring Diagram PDF (6S2P)

Computed 6kW 48V off-grid solar system solar diagram: 6S2P array, wire gauges, OCPD, battery arrangement, routed parts and printable files.

6kW 48V Off-Grid Solar Wiring Diagram PDF (6S2P) showing 6S2P panels, MPPT controller, 4S1P battery bank, wire gauges and OCPD ratings
Computed from the values printed in the schedules below; not a permit set.
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View the scalable diagram inline6kW 48V Off-Grid Solar Wiring Diagram PDF (6S2P)Computed 6S2P schematic for a 6 kW 48 V off-grid solar system system, including wire and OCPD labels.FIG. OGA-LIBRARY-0136kW 48V Off-Grid Solar Wiring Diagram PDF (6S2P)COMPUTED FROM OGA CALC-CORE · NOT A PERMIT SET8 AWG · 40 A OCPD · 1.04% drop4/0 AWG · 175 A OCPD · 0.22% drop4/0 AWG · 175 A OCPD · 0.12% drop12 × 500 W panels6S2P · 312 Voc / 23.6 IscCombiner2 stringsDC disconnect40 A DC ratedMPPT controller157 A min · 450 V max175 A OCPDController output4 × 100 Ah LiFePO₄4S1P · 5120 Wh bank175 A OCPDInverter feed5200 W inverter10400 W surge · 120.4 A DCShunt120.4 A monitored returnGround busEquipment groundingarray → controller8 AWG · 40 A OCPD · 1.04% drop48 ft one way · Coppercontroller → battery4/0 AWG · 175 A OCPD · 0.22% drop7 ft one way · Copperbattery → inverter4/0 AWG · 175 A OCPD · 0.12% drop4 ft one way · CopperPOSITIVENEGATIVEEQUIPMENT GROUNDFAILING SEGMENTNEC 2023 Table 310.16 (60 C column) - conductor ampacityNEC Chapter 9, Table 8 - conductor DC resistanceNEC 240.6(A) - standard overcurrent-device ratingsNEC 210.19 / 215.2 - 125% continuous-load conductor sizingNEC 690.7 - maximum PV source-circuit voltageNEC 690.8 - PV source-circuit current sizingVerify equipment terminals, listings, ambient/bundling derates and local code before installation.

What this computed plan shows

The 6kW 48V Off-Grid Solar Wiring Diagram PDF (6S2P) turns a searched-for off-grid solar system idea into one internally consistent DC schematic. Its 6 kW array uses 12 modules in 6S2P, so the drawing labels the array at 264 Vmp and 23.6 Isc rather than relying on a generic icon. The result is a planning reference for comparing real equipment ratings before installation.

Controller sizing follows two separate limits in this off-grid solar system configuration. Power conversion calls for 157 A or more at the battery side, and cold-array allowance raises the PV check from 312 V nameplate Voc to 390 V. The selected MPPT envelope is 170 A and 450 V.

PV current is evaluated at 36.8 A for the 48 ft array run, which selects 8 AWG copper plus a 40 A OCPD. Charging current is 125 A across 7 ft, moving the recommendation to 4/0 AWG copper with 175 A protection. Each percentage in the table is a round-trip voltage-drop calculation.

For storage, the computed arrangement is 4S1P, assembled from 4 × 100 Ah LiFePO₄ batteries. Series connection establishes the 48 V nominal level, while parallel strings bring the bank to 100 Ah. The displayed 5,120 Wh is nominal capacity rather than a promise of daily usable energy.

The inverter contributes 120.4 A of continuous DC input at the engine’s efficiency assumption. Over a 4 ft one-way cable path, 4/0 AWG copper and a 175 A protective device keep calculated drop at 0.12%. Its 10,400 W surge label is recorded for equipment comparison, but the schedule must still be checked against the chosen inverter manual.

This page stays inside the verified engine boundary: every component and conductor currently returns a within verdict. A different panel label, longer run, hotter ambient or changed battery count can alter that result, so follow the customize link rather than scaling the picture by intuition. Local rules, equipment listings and inspection requirements take precedence over this planning aid.

For later comparison, keep the 6 kW array, 4S1P bank and the 48/7/4 ft one-way routes together when requesting equipment quotes or an inspection review.

Wire, protection and battery schedules

Wire schedule

SegmentDesign currentOne-way runComputed conductorVoltage dropSizing basis
array → controller36.8 A48 ft8 AWG copper1.04%156% of array Isc (NEC 690.8)
controller → battery125 A7 ft4/0 AWG copper0.22%controller output at 125% continuous-load ampacity
battery → inverter120.4 A4 ft4/0 AWG copper0.12%inverter continuous DC input at 90% efficiency and 125% ampacity

Overcurrent protection

Protected segmentRequired ampacityOCPDConductor ampacityVerdict
array → controller36.8 A40 A40 Awithin
controller → battery156.3 A175 A195 Awithin
battery → inverter150.5 A175 A195 Awithin

Battery arrangement

ArrangementChemistryUnitsUnit capacityBank capacityNominal energyNominal voltage
4S1PLiFePO₄4100 Ah100 Ah5,120 Wh48 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.

12 × 500 W solar panelVoc 52 V, Vmp 44 V, Isc 11.8 AVerify locally — no proven catalogue match
1 × MPPT charge controllerat least 157 A output and 390 V PV inputVerify locally — no proven catalogue match
4 × 100 Ah LiFePO₄ battery4S1P bank, 5120 Wh nominalVerify locally — no proven catalogue match
1 × 5200 W inverter10400 W surge, 48 V DC inputVerify locally — no proven catalogue match
105 ft × 8 AWG Copper cableTHHN/THWN-2 copper (or UL-listed battery cable), 75°C+Verify locally — no proven catalogue match
2 × Ring/lug terminalstinned, sized for 8 AWGVerify locally — no proven catalogue match
1 × 40 A breaker / fuseDC-rated, 264 V system — must not exceed the wire's 40 A ratingVerify locally — no proven catalogue match
1 pr × Heat-shrink + ferrulesadhesive-lined, color-codedVerify locally — no proven catalogue match
20 ft × 4/0 AWG Copper cableTHHN/THWN-2 copper (or UL-listed battery cable), 75°C+Verify locally — no proven catalogue match
2 × Ring/lug terminalstinned, sized for 4/0 AWGVerify locally — no proven catalogue match
1 × 175 A breaker / fuseDC-rated, 48 V system — must not exceed the wire's 195 A ratingVerify locally — no proven catalogue match
1 pr × Heat-shrink + ferrulesadhesive-lined, color-codedVerify locally — no proven catalogue match
15 ft × 4/0 AWG Copper cableTHHN/THWN-2 copper (or UL-listed battery cable), 75°C+Verify locally — no proven catalogue match
2 × Ring/lug terminalstinned, sized for 4/0 AWGVerify locally — no proven catalogue match
1 × 175 A breaker / fuseDC-rated, 48 V system — must not exceed the wire's 195 A ratingVerify locally — no proven catalogue match
1 pr × Heat-shrink + ferrulesadhesive-lined, color-codedVerify locally — no proven catalogue match

Pre-install review steps

  1. Confirm the array and controller window: Verify that the 6S2P string plan produces 312 V open circuit and that the equipment is rated above the 390 V cold-design value.
  2. Lay out the protected DC runs: Measure the one-way paths before ordering cable, then compare them with the computed 48 ft, 7 ft and 4 ft runs shown here.
  3. Build complete battery strings: Arrange all 4 battery units as 4S1P; do not leave a partial series string in a 48 V bank.
  4. Commission against equipment instructions: Check polarity, terminal torque, DC interrupt ratings, conductor temperature ratings, ambient correction and local inspection requirements before energizing the 5,200 W inverter.

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Open the parent build guide for the surrounding design context, safety notes and installation discussion.

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