Battery

Interstate SRM-27 88Ah Deep Cycle wiring diagram

12 V, 88 Ah flooded Group 27M deep-cycle house battery for marine and RV use. Interstate lists 600 A CCA, 750 A CA and 160 minutes reserve capacity at 25 A. The cranking rating is separate from continuous discharge; verify engine requirements before considering starting use.

Nominal voltage
12 V
Capacity
88 Ah
Units

Wiring diagram

How the SRM-27 88Ah is wired.

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Interstate SRM-27 88Ah Deep Cycle wiring example with 4 components: SRM-27 88Ah, Battery disconnect, Fused DC distribution, DC fridge. 5 cable connections. Crossings are not junctions.Fused DC distribution 1 to DC fridge +: 4 mm² · 15 A fuse, 3 m one way. Fused DC distribution 1 to DC fridge −: 4 mm², 3 m one way. SRM-27 88Ah + to Battery disconnect A: 6 mm² · 15 A fuse, 3 m one way. Battery disconnect B to Fused DC distribution IN +: 6 mm² · 15 A fuse, 3 m one way. SRM-27 88Ah − to Fused DC distribution IN −: 6 mm², 3 m one wayFused DC distribution 1 to DC fridge +: 4 mm² · 15 A fuse, 3 m one wayFused DC distribution 1 to DC fridge −: 4 mm², 3 m one waySRM-27 88Ah + to Battery disconnect A: 6 mm² · 15 A fuse, 3 m one wayBattery disconnect B to Fused DC distribution IN +: 6 mm² · 15 A fuse, 3 m one waySRM-27 88Ah − to Fused DC distribution IN −: 6 mm², 3 m one wayInterstate SRM-27 88Ah Deep CycleSRM-27 88Ah++−−Main Battery SwitchBattery disconnectABBlue Sea 5025 ST Blade Fuse BlockFused DC distributionIN +IN +IN −IN −1111Dometic CRX-65 Fridge. This 12 V example uses Dometic's 15 A supply protection and a short 1 m run with 6 mm² cable. Check the manual's voltage-specific cable graph for your route. At 24 V, the specified protection is 7.5 A. Running current and the fuse rating describe different things.DC fridge++−−4 mm² · 15 A fuse4 mm²6 mm² · 15 A fuse6 mm² · 15 A fuse
Interstate SRM-27 88Ah Deep Cycle wiring example with 4 components: SRM-27 88Ah, Battery disconnect, Fused DC distribution, DC fridge. 5 cable connections. Crossings are not junctions.Red = positive · dark = return · dashed = signal. Wire sizes and fuse ratings are example values; use the equipment instructions and actual installation lengths.
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Fit check

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Technical reference

Specifications and terminal map.

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Catalog specification

12 V, 88 Ah flooded Group 27M deep-cycle house battery for marine and RV use. Interstate lists 600 A CCA, 750 A CA and 160 minutes reserve capacity at 25 A. The cranking rating is separate from continuous discharge; verify engine requirements before considering starting use.

Nominal voltage
12 V
Capacity
88 Ah

Terminal map

Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.

+

positive · bidi

—

−

negative · bidi

—

A dash means a current rating is not specified here.

Sources and sizing method

Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.

Example sizing. Wire sizes and fuse ratings apply to the connected example, not a fixed cable size for this component. Set your actual equipment, current, lengths and installation conditions in Crimp before choosing hardware.

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Next step

Plan your installation with SRM-27 88Ah.

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