Madjax Ascent Battery Upgrade – 210Ah Lithium Package – BOLT Energy

Here is a reality most dealers golf cart dealers won’t admit… the range estimates on these carts are all over the place and totally inconsistent. Passenger count, weight of those passengers, ambient temperature, terrain elevation, throttle response, powertrain efficiency, 12V accessories, and MORE, affect your overall driving range. The numbers we provide are accurate and conservative, so you can truly understand WHAT YOUR ESTIMATED TOTAL MILEAGE WILL BE.

We have found with our customer’s on similar 4-FWD models, that even the factory 160Ah setup often falls short when you are pushing for speeds beyond 24mph or trekking across the expansive golfing landscape of The Villages, where people want to spend all day out and about without having to stop home to charge.

To ensure you have ZERO RANGE ANXIETY (additional 12-15 miles of range) and true peace of mind, we have perfected the Madjax Ascent battery upgrade to a 210Ah Bolt Energy Lithium setup. Here is how our expert installation team does the installs right.

1. Remove Existing 105/160Ah Battery

The first step for your Madjax Ascent battery upgrade is removing the factory-Bolt 160Ah battery. Remember to recycle old batteries in an appropriate manor. 

• Safety First: Turn off the factory-160Ah by holding the power button for 8-seconds.  The green-ring should not be illuminated to indicate there is no power at the terminals.  Disconnect the batteries, making sure to label all wires and connections. 
• Undo Hardware:  Undo necessary body panels/hardware so the battery is free to be lifted out.  
• Remove 160Ah: These batteries are not lightweight.  It is recommended to have a 2nd person, or engine-lift/hoist to remove the 160Ah battery.

2. Map Out new Dual-105Ah Setup

The Bolt 105Ah ‘Mini’ units are designed to fit the most compact spaces in carts. For the Madjax Ascent battery upgrade we will fit two of them in the cart – you’ll want to ensure your mounting holes and wiring are mapped and routed before any drilling is done.  This is one of the most important parts, or you will end up re-measuring more than you’d like to, in order to squeeze two batteries in there.  

Once you’ve measured and marked your holes, drill them out and use appropriate mounting hardware to secure the batteries directly to the base. This part of the Madjax Ascent battery upgrade can be tricky – if you’re not comfortable doing this step yourself, we recommend linking up a professional installer (Best Battery performers professional installations all across Central Florida).

Drop the new 105Ah batteries and insert your mounting hardware.  Tighten your selected mounting bolts down and check the integrity of the hardware.  

3. Critical Power Wiring and SOC Integration

The Bolt Energy batteries we’re using for this Madjax Ascent battery upgrade communicate with the factory touchscreen display via CANbus.  You will want to ensure that one of the two new 105Ah batteries is plugged in so the cart is reading the state-of-charge accurately.  The SOC% will be within +/- 1% of true SOC when reading off of the one battery, as both units will discharge/charge at the same rate when wired in parallel.  

The onboard charger is already a Bolt-Energy brand, and will not need to be replaced for this setup.  HOWEVER, you will need to prepare parallel jumper power cables.  We recommend 2AWG for these, and no longer that 14″ is required.  Depending on the length of the existing main (B+) and (B-), you may feel inclined to make a new 2AWG cable so you have enough lenght to reach the terminals.  We run a new (B+) straight to the main positive fuse where the factory cable was.  Otherwise, you are replicating the setup from the 160Ah, and simply wiring the two in parallel with your new 4AWG cables (can be ordered from Best Battery).