If an existing RV dual-battery setup has a red battery switch with OFF, ON and COMBINE settings, it may be a Blue Sea Dual Circuit Plus model. Two versions commonly found in kits are 6011 and 5511e. Matching the exact model number helps avoid mistakes: both control two circuits, but they do not share the same footprint or current rating.
OFF, ON and COMBINE: what the contacts do
Unlike a traditional 1/2 battery-bank selector, a Dual Circuit Plus switch has two distinct load outputs. ON supplies the starting and house output circuits from their individual battery inputs. COMBINE bridges the banks when manual emergency assistance is needed.
OFF
Start ✕ House ✕Both switched load outputs are disconnected from their respective battery inputs.
ON
Start → Start loadsHouse → House loadsThe starting and house circuits are ON but stay separate through the manual switch.
COMBINE
Start ↔ House banksBoth banks and switched circuits are manually paralleled for temporary emergency use.
Identify the model before selecting a replacement
| Detail | 6011-BSS | 5511e-BSS |
|---|---|---|
| Switch design | m-Series Dual Circuit Plus | e-Series Dual Circuit Plus |
| Positions | 3: OFF / ON / COMBINE | 3: OFF / ON / COMBINE |
| Battery inputs | Two | Two |
| Maximum voltage | 32V DC | 32V DC |
| Continuous current | 300A | 350A |
| Intermittent current (5 min) | 450A | 525A |
| Engine starting rating (30 sec) | 675A per circuit | 700A per circuit |
| Battery terminal studs | 3/8 in–16 (M10) | 3/8 in–16 (M10) |
| Terminal torque | 120 in-lb (13.56 Nm) | 140 in-lb (15.82 Nm) |
| Mounting fasteners | #10 screws | 1/4 in (M6) screws |
| Alternator field disconnect | Not fitted | Not fitted |
| Switch application in Blue Sea kits | 7649 mini kit | 7650 and 7650003 kits |
Both models use 3/8 in–16 main battery studs, but the mounting dimensions, torque specifications and current capacities differ. Inspect the model marking and the space around the existing switch. A matching knob or three-position label alone is not enough to confirm a replacement.
Exact Blue Sea 6011 and 5511e product listings
Use the catalog photographs as a visual reference, then confirm the exact model number and product details. UsedRVParts viewing and pickup in Kelowna is by appointment where available.
Blue Sea manufacturer diagrams
Use the 6011 switch specifications and drawings and the 5511e e-Series product reference to confirm the physical terminal layout, mounting options, and applicable installation instructions. Blue Sea's manufacturer comparison provides an additional check of electrical ratings. Read the model-specific instructions before wiring battery and charging circuits.