1. Which charging technology is the company offering?

There are two fast charging technologies available for charging multiple vehicles on one system: ParallelChargeTM and sequential charging. ParallelChargeTM systems use all available power to recharge multiple vehicles at the same time. Sequential chargers charge only one vehicle at a time whether more power is available or not.

2. How does the system measure battery temperature?

Most battery manufacturers’ fast charging warranties have an electrolytic temperature maximum limit. In order to meet the warranty you need a system that measures battery temperatures in the electrolyte fluid; not on the cell casing, intercell connection or power terminal.

3. What are the system’s data recording capabilities?

Tracking your fast charging program is paramount to its success. You will want to be sure the system you select records and reports complete charge event data that can be easily retrieved without the vendor’s assistance.

4. Can the system provide 100% recharge every 24 hours?

Most battery manufacturers’ fast charge warranties require a 100% recharge once every 24 hours. Make sure the fast chargers you evaluate have ample charging power to return all vehicles to 100% in the charging time you have available.

5. Is the Fast charge system sized to charge all vehicles at once?

In a typical operation, an entire fleet goes to break or shift change at the same time. In some cases, this is your only charging window, so a fast charge system should be sized to deliver sufficient power to all vehicles simultaneously. You may choose to stagger your break and/or shift change times, and possibly reduce your system costs. However, this alternative that must be weighed against the cost of additional fleet management and the inflexibility of not being able to charge all vehicles at once.

6. Can the multi-vehicle system deliver an equalization charge to one vehicle at the same time it is delivering a standard charge to another vehicle?

Sometimes it is necessary to schedule an equalization charge for one vehicle at the same time you need to recharge another vehicle. Be sure that the fast charging system you choose has the ability to do both simultaneously.

7. Can the system be easily integrated into your operation and can it be easily expanded?

Some systems have a rigid architecture that offers only one or two installation options, which may not be optimum for your operation. Modular systems are the most flexible. They offer the choice of pole, floor, or shelf mounting, and charging stations can be placed anywhere up to 750 feet from the power source. With a modular system, you can also add charging stations easily without reconfiguring the system.

8. How much electrical infrastructure will the system require?

The fewer electrical connections you have to pull in for fast charging, the lower your infrastructure costs. Be sure to include the number of electrical connections you’ll need in your cost comparison of fast chargers.

9. What is the power quality and total harmonic distortion of the system?

Industrial battery chargers use one of three technologies: SCR, ferro-resinnant, or IGBT (transistor). IGBT chargers offer the most efficient power quality and best Total Harmonic Distortion ratings, providing you greater charging efficiency.

10. Will the system deliver enough power to keep your trucks running all day?

Many industrial battery applications require 1,200 — 1,400 Ah per day. Be sure you know your amp hour requirements per vehicle per day and carefully review what the fast charger can deliver to be sure the power is sufficient for your operation