Battery to do discharge test, 24VDC 200AH, what recommended virtual load can I use?

Programmable DC electronic load:

Advantages: This type of virtual load can accurately set discharge current, voltage and other parameters according to your test needs, with high accuracy and stability. It can simulate a variety of different load conditions, such as constant current, constant voltage, constant power and other modes, so that you can carry out battery discharge tests under different conditions. And it can monitor and record the voltage, current, power and other data of the battery during the discharge process in real time, which is very helpful for analyzing the performance and status of the battery. For example, you can set it to start with a smaller current and gradually increase it to see how the battery performs under different loads.

Disadvantages: The price is relatively high, and requires a certain amount of professional knowledge and operating skills to use and set up properly.

Resistance box:

Advantages: Resistance boxes are a relatively simple and cost-effective option for virtual loads. By selecting different resistance values, the discharge current can be controlled. The principle is simple and easy to understand, the operation is relatively simple, and it is suitable for some occasions where the test accuracy is not particularly high. For example, in some small battery repair shops or laboratories, resistance boxes are a common battery discharge test tool.

Disadvantages: The discharge current of the resistance box is not stable enough and may be affected by factors such as ambient temperature. Moreover, it is impossible to set and control various discharge parameters as accurately as programmable DC electronic loads, and it is impossible to record detailed test data in real time.

Dedicated battery discharge load equipment:

Advantages: These devices are specifically designed for battery discharge testing and have good compatibility and reliability. It usually has a variety of protection functions, such as overcurrent protection, overheat protection, short circuit protection, etc., which can effectively protect the safety of the battery and test equipment. And the operation interface is simple and intuitive, easy to use, suitable for different levels of users.

Disadvantages: Dedicated battery discharge load equipment is generally large and not easy to carry. And its function may be relatively simple, can only be used for battery discharge test, can not have a variety of functions and application scenarios like programmable DC electronic load.

When choosing a virtual load, you need to consider factors such as your specific test needs, budget, and requirements for test accuracy. If accurate testing and data analysis are required, programmable DC electronic loads are a better choice. If the budget is limited or the test accuracy requirements are not high, resistance boxes or dedicated battery discharge load equipment can also meet the basic test needs.