Putting It All Together Without Pulling Your Hair Out – Anderson Power Pole Connectors

When it comes to connecting high power batteries to drive systems on your ebike there really is only one viable option. Anderson Powerpole connectors come in 4 main power ranges, the 15 amp, 30 amp, 45 amp and much larger 50+ amp connectors. For almost all applications I recommend getting the 45 amp connectors as the price difference is negligible and it’s better to have the higher amperage connectors even when running at lower power levels. The Anderson has a sacrificial tongue which will take the brunt of the spark that will inevitably be created every time you hook up your high power battery.

The powerpole comes in a large variety of sizes and power levels, I recommend the 45 amp connectors

The powerpole comes in a large variety of sizes and power levels, I recommend the red/black 45 amp connectors

When using Anderson connectors I usually run the wiring on 10 gauge multi-stranded speaker wire (red/black is my favorite). Although 10 gauge is far more than what you need at most power levels, it means you have lower voltage drop and the cable will not heat up. It also means that the insulation will tend to be a little thicker than the lighter gauge wiring, and I like to have stiff wires that don’t flop all over the place.

A good set of crimpers will pay for itself many times over. A bad set will give you endless headaches and frustration.

A good set of crimpers will pay for itself many times over. A bad set will give you endless headaches and frustration.

The Anderson Powerpole connectors come in a wide range of colors, but I recommend red and black for power and then yellow, green and blue for the phase wires just so you’re standardized on the same colors as everyone else. To correctly connect the Powerpole connectors you will need a set of good crimpers. It’s well worth investing $30 for a set of decent crimpers from ebay, I usually buy from connectorpros although there are many vendors for this product.

Crimping the 45 amp connectors is a snap. Just strip off about 7-8 mm of insulation then put the metal connector in the jaws of the crimper into the slot that matches the amp rating stamped on the die.  Push the connector in till it stops and then carefully feed the wire into the connector till the insulation hits the metal connector. Then ratchet the tool all the way down and release. Although you can probably crimp these connectors with a standard wire crimper/stripper, I strongly recommend getting the dedicated Powerpole crimpers. They pay for themselves quickly in the amount of frustration they will save you. I am not crazy about the 30 amp connectors, so if you are crimping very fine wires use the 45 Amp connectors and crimp them on the 30 or 15 amp slots as appropriate on the crimpers. This will ensure that they won’t pull out even when crimping on super thin wires.

Safety Note: Never cut through both the power and ground connectors at the same time on your battery. Only work with one side at a time, never have both ends stripped and loose as you might accidentally hit both at the same time with the crimpers if you are not careful. Cut and strip the wire, crimp the connector, then put the plastic housing on it before you start on the other wire. This almost guarantees no fireworks when working on battery connectors.


Once the metal connector is crimped on the wire you must push it into the connector with the tongue side down and push it all the way in till it clicks. If it doesn’t click then it’s not all the way in and can pull out. The connectors fit side by side like legos sliding together and becoming a single connector.

The Roll Pin

Retention clips are available if zipties are a little too ghetto for your build

Retention clips are also available if zipties are a little too ghetto for your build. Be aware that you can’t use the retention clip if roll pins are installed.

There is also a roll pin which gets inserted into the circular hole between the connectors which keeps the connectors from sliding back and forth in relation to each other. This is handy for making a single connector out of multiple connections. If you want the connector to hold tight no matter how hard the wire gets pulled you can use a ziptie or velcro-one ties between the two wires to go around both connectors to keep it from loosening up. If you want to detach it you can cut the ziptie or release the velcro.

If you don't want the connectors to loosen up on you and they are going to stay connected this is a good solution.

If you don’t want the connectors to loosen up on you and they are going to stay connected this is a good solution.

The larger 50+ amp connectors are more challenging as they need to be soldered rather than crimped. I hold the connector cup side up and fill it with hot solder then stick the wire in before it cools and let the solder solidify around the wire. This technique works quite well, at least as well as crimping a connector would, although some people then crimp the soldered connector to make doubly sure it will not fail. Give the wire a pull after the solder hardens to make sure it is attached good and tight.

Silicone and heat-shrink tube the connectors

IMAG2619One thing I have done which seems to make the connector a little more waterproof and a lot more sturdy is to put a dab of silicone where the insulation meets the connector then slip some heat shrink tubing over the plastic connector and wire and shrink it down while the silicone is still wet. This makes a much stiffer connector that is less likely to break off or have water and snow seep in.

SPEC-Pak Weather resistant snap together housings

Although I have not tried them, my good friend Larry at Boxy Bikes really likes them, especially in the winter. To bunch 4 Anderson connectors together and protect them from the elements you can buy the 4 Pole SPEC-Pak. Be aware that it requires a separate tool to install these connectors and they are rated for 1000 volts which is far more than you would ever want to use on an ebike. They are also kind of pricey compared to the normal connectors.

Where to buyrollpin

There are reputable online dealers with web stores like powerwerx.com . That being said I usually buy mine on ebay from connectorpros. Like everything on ebay there are always cheap Chinese knockoffs so if you don’t go with a reputable vendor you may get a sub-standard product.

The electrical connectors form the foundation of your ebike build. Without them your bike won’t move. It is quite frustrating trying to deal with loose or bad connectors. I have yet to find any connector that is as inexpensive, works as well and is as easy to install as the Anderson Powerpoles.

Ride On.

32 thoughts on “Putting It All Together Without Pulling Your Hair Out – Anderson Power Pole Connectors

  1. If you look at the connectors on the em3ev batteries you can see that they may have some sort of spark prevention. The green anderson connector has a special tip that is slightly longer so that it connects before the rest of the Andersons. I’m guessing that it sends current through a resistor so that the caps in the controller fill up slowly and don’t spark.


    • Sadly, EM3ev does not sell or supply the connector as a pigtail. Very disappointing. It is an excellent connector. I did have some fails with Anderson installs. Great connectors but not as “clean”as the EM3ev connector on BBS0x.All my Anderson fails were operator error. I wasn’t seating the stainless bit deep enough. I think Grin technologies using and supplying systems with Anderson speaks to their quality. Disclaimer: I sell Grin tech products small scale. As accessories to any install I do.


  2. Excellent article. I too use Anderson’s with the 45amp connectors for all my e-bike connections.

    I will try the suggestion of using silicone and shrink wrap to further stiffen and waterproof the connectors


  3. I ended up coming back to this one again. I made errors in my connectors. Now that I’m clear my Anderson connections are stellar. One question. I don’t comprehend how the pin works to hold the connectors. I would think they’d push apart. Anyone have a link to a picture of a
    installed pin?

    ebikes.ca has an excellent how to on using Anderson and JST-SM connectors and crimpers. a 22 page pdf.


    • The two connectors slide together. They have dovetail lands and grooves. The slide side by slide with each connector having a half round. Once the half rounds line up, the roll pin is inserted. You can’t move the two connectors as the roll pin prevents the motion (you’d have to shear the roll pin).

      Liked by 1 person

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  25. Thank you for the very informative post. What about rain? These connectors doesn’t look ideal, thinking about a e-bike where the user unplugs frequently the battery, so no possibility to put a heat shrink tube around the whole connection?


    • You can do that. I haven’t had problems with them in the rain. If you submerse them in water they will 100% short out. To waterproof connectors I use oversized heat shrink tubing then fill both ends with silicone, turn it around 360 degrees then heat shrink it and clean up the silicone that squeezes out the ends. That will make a 100% waterproof connection that can be submersed in water.


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