Battery isolator diodes

There are various ways to distribute the charging current from a power source to several battery groups simultaneously. One of them is to use our high-quality battery isolator diodes. At Offgridtec, you will find exactly the right battery isolator diode for your needs. Browse through our online shop today and find the right accessories for your batteries!

The three options for charging two or three batteries simultaneously

There are three possible options for charging interconnected batteries simultaneously without running the risk of them discharging:

1. Charge current distributors distribute the charge current evenly across up to three batteries without connecting them to each other. This is the most effective way to prevent the batteries from discharging, for example when a powerful consumer is connected.
2. A disconnect relay is an electromagnetic switch that mechanically separates the batteries from each other, preventing any loss of voltage. However, a simple disconnect relay usually requires a pulse, typically from the D+ alternator.
3. Isolation diodes are semiconductor elements that distribute charging current. They regulate the current so that it can only flow in one direction. This enables simultaneous charging and prevents mutual discharge. However, approximately 0.7V is lost when they are used, which means that the battery can never be fully charged.

At Offgridtec, we carry high-quality isolation diodes that minimize voltage loss. For example, various models from the Victron Energy brand keep voltage loss very low through the use of modern Schottky diodes. This means that the voltage loss is approximately 0.3V at low currents and approximately 0.45V at rated current. In addition, some models are equipped with a compensation diode that compensates for voltage losses by slightly increasing the output voltage of the power source.

Buy high-quality battery isolator diodes online at Offgridtec

Our Offgridtec online shop offers our customers only the best products at affordable prices. Here you will find a wide range of battery accessories, such as various battery isolator diodes, among which you are sure to find exactly the right one for your needs.

If you have any questions about our product range, we are of course happy to help. We offer customer service for both private customers and specialist dealers on 08721 91994-00 and are also happy to answer your questions by email: info@offgridtec.com. 

FAQ

1. What is an isolating diode? An isolating diodeallows several batteries to be charged from a single power source without the batteries being connected to each other.
2. What are the disadvantages of an isolating diode? The disadvantage of an isolating diode is the voltage drop, which causes losses at the diode. This means that the battery is never fully charged. However, Offgridtec stocks modern models that minimize voltage loss to as little as 0.3V.
3. What options are there for charging batteries simultaneously? There are three different options for charging multiple batteries simultaneously: isolating diodes, isolating relays, and charging current distributors. All three distribute the charging current from a power source to multiple batteries simultaneously without connecting them to each other.
4. What should you look for when buying an isolating diode? When buying an isolating diode, you should make sure that it is a modern model that keeps voltage losses as low as possible, for example, by using a compensation diode.