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Lead Acid battery (Flooded) Chargers
It is particularly important to maintain and charge your batteries properly. If you overcharge your batteries, you could damage them and reduce their life. You can easily do this by getting an automatic charger that shuts off after it full charges the battery. Most golf carts and LSV’s include a charger when you buy them.
Golf Cart Chargers come in several styles depending on the age of the cart, brand and battery bank voltage.
Battery Connection drawings and Trickle Charging
Common styles:
- Mechanical - Older carts the charger has a mechanical timer used to run a charge cycle. This style will run one charge cycle and then turn off. This style of charger will not maintain the voltage in the battery pack.
- Solid State - Newer carts have a solid state charger that when it is plugged into the golf cart first monitors the voltage. If the voltage is to low the charger will not start a charge cycle. This style of charger will not start a charge cycle unless the voltage in the battery pack is above it’s set threshold voltage. This is a safety feature to protect you and the batteries from harm. Reasoning is if there is a shorted or failed battery in the battery pack applying voltage to it could cause it to explode. So for this reason if the battery voltage is low your charger will not start a charge cycle.
The style will run one charge cycle and then turn off. This style of charge will not maintain the voltage in the battery pack.
As long as you are certain all the batteries in the pack are ok and not shorted then you can revive them with a typical automotive 12 volt charger. Your golf cart charger will start charging once you have a sufficient charge above the chargers threshold voltage.
- Solid State with Maintainer circuit - Many of the Late model to present day chargers have a maintainer circuit. Once a full charge has been performed the charger goes into Maintain mode to hold the charge over time. If a battery is shorted the charger will not start a charge cycle.
⚡ Minimum Battery Voltage Required for Golf-Cart Chargers to Start
Most modern golf-cart chargers will not turn on if the pack voltage is too low, because the charger must detect a valid battery before it will energize. This is a built-in safety feature to prevent charging the wrong voltage pack or connecting to a shorted battery.
Typical Cut-In Voltages by System
36-Volt Battery Pack
48-Volt Battery Packs
Why Chargers Require a Minimum Voltage
- They use pack voltage to auto-detect system voltage (36 vs 48 V).
- Low voltage may indicate reverse polarity, shorted cells, or a failed pack.
- Prevents the charger from energizing into a dead short.