Anderson Connectors for Van & RV Builds: What They Are and How to Use Them
Anderson connectors solve a simple problem: how do you disconnect a high-current circuit quickly and safely without cutting wires? Here's how van builders use them.
The Anderson product family
Anderson Powerpole (PP15/30/45): The original ham radio and amateur DC connector. Color-coded genderless housings (red = positive, black = negative in the 45A series). Rated 15–45A depending on contact size. Very common for portable solar panel connections, ham radios, and 12V accessories.
Anderson SB50: Industrial-grade, single-housing connector. One SB50 connector holds both positive and negative contacts. Rated 50A continuous at 12V. Available in multiple housing colors for polarity coding. Used in van builds for higher-current connections.
Anderson SB175/SB350: Large industrial connectors for very high current (EV charging, large battery banks). Rarely used in van builds but appear in large solar arrays and off-grid systems.
Why builders use Anderson connectors
Quick disconnect without tools: Unhook a portable solar panel in seconds rather than unscrewing lugs.
Polarity-safe: Anderson housings physically prevent incorrect polarity connection when you follow the color code standard.
Weatherproof ratings: SB series connectors have IP65 or better rating — appropriate for roof-penetrating connections and exterior-mounted shore power inlets.
High cycle life: Rated for thousands of connect/disconnect cycles. The spring contact design maintains good contact pressure over time.
Common van build applications
Portable solar panel connection
Connect your rooftop MPPT controller's PV input to an Anderson connector (Powerpole 45 or SB50) accessible from outside. Plug in a portable solar panel when you want extra charge while stationary.
This lets you add 100–200W of portable capacity without permanent rooftop mounting.
Shore power DC inlet (for DC-DC connections)
Some van builders install an Anderson SB50 on the exterior as a DC inlet — connect a 40–50A DC power supply to top up the battery from shore power without a dedicated AC converter inside.
Less elegant than a proper AC shore power inlet, but useful for some setups.
Removable component connections
If you share equipment between vans or want to easily remove components (a battery box, a portable power station), Anderson connectors let you plug/unplug without tools.
Interconnect between battery sections
In split battery systems (separate starter and house battery banks), Anderson connectors are used as the connector point — can disconnect the house bank quickly for service.
How to crimp Anderson contacts
Anderson contacts (the metal pins inside the housing) are crimped to wire ends. You need:
- Anderson crimp tool: Available from Anderson's own brand (~$50) or use a quality ratcheting crimper with the appropriate die
- Anderson contacts: Selected for your wire gauge and current rating
- Anderson housing: SB50 or Powerpole housing in your color choice
Steps:
- Strip 5/8" of insulation from wire end
- Insert wire into Anderson contact's crimp barrel (bare strands should fill the barrel)
- Crimp with the correct die — the contact should be firmly attached with no pull-off under reasonable force
- Slide the crimped contact into the housing until it clicks (Anderson contacts have a latch that locks them in)
Heat shrink: Not typically used inside Anderson housings (no space), but apply heat shrink to the wire-to-contact junction outside the housing if the connector will see moisture.
Polarity convention
Powerpole: Red housing = positive, black housing = negative (universal ham radio convention — follow it).
SB connectors: No universal color convention. Mark your connectors with a permanent marker or colored tape when you install them. Both poles of a circuit use the same housing; coding is by your labeling.
Where Anderson connectors are overkill
Anderson connectors are designed for repeated connect/disconnect. For permanent wiring connections you'll never unplug, ring terminals crimped to studs are simpler and equally reliable. Anderson connectors add cost and a potential failure point if not crimped properly.
Use them where quick disconnect capability is actually needed.