# Battery voltage balancer QOLTEC 51097 for 24V (2×12V) batteries, 5A balancing current

**URL:** https://aio.lv/en/product--qoltec-51097--11558563
**Data updated:** 2026-02-15 12:51 (EET)
**Category:** Batteries
**Manufacturer:** QOLTEC
**Manufacturer code:** 51097
**EAN:** 5901878510972
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 24.99 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 20.65 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-51097--11558563

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 25.06.2026 | free |
| Pickup points | 30.06.2026 | 1.99 EUR |
| Courier delivery to door | 30.06.2026 | 4.99 EUR |

## Summary description

QOLTEC 51097 is a voltage balancer designed for 24V battery systems composed of two 12V batteries. With a 5A balancing current, it equalizes charge between the two battery blocks to prevent overcharging or undercharging of one side. Intended for use in backup power, solar setups and vehicle systems, it improves battery lifespan and system reliability by maintaining balanced voltages.

## Long description

QOLTEC 51097 is a voltage balancer engineered for 24V battery banks composed of two 12V batteries. The device provides a continuous 5A balancing current to equalize the state of charge between the two battery blocks, reducing the risk of one battery becoming overcharged or undercharged. Designed for use in backup power systems, solar installations and vehicle electrical systems, the balancer helps maintain stable voltage distribution and supports longer battery service life through passive active balancing during charge and discharge cycles.
Advantages
The balancer offers a straightforward electrical solution to common imbalance issues in 24V (2×12V) configurations by redirecting excess charge from the higher-voltage battery to the lower-voltage one at up to 5A. Installation requires minimal wiring and does not need complex configuration, making it compatible with typical lead-acid and AGM 12V batteries used in backup and mobile applications. The device operates automatically once connected and provides continuous protection against state-of-charge divergence that can shorten overall battery pack performance.
Suitable for
24V battery banks assembled from two 12V lead-acid or AGM batteries
Uninterruptible power supply (UPS) backup systems
Small-scale solar power systems with 24V battery storage
Recreational vehicles, boats and mobile power applications using 2×12V batteries
Key specifications
Nominal system voltage: 24V (configured as two 12V batteries)
Balancing current: 5 A continuous
Operating mode: automatic passive/active balancing during charge and discharge
Connection: direct wiring to each 12V battery terminal
Compatibility: compatible with common 12V lead-acid and AGM battery types
How to use
Mount the balancer in a dry, ventilated location near the battery bank and connect its leads to the positive and negative terminals of each 12V battery following the wiring diagram supplied with the unit. Ensure all battery terminals are clean and tight before connection. After wiring, the device begins balancing automatically; no further configuration is required. Periodically inspect the connections and battery condition as part of routine maintenance to ensure continued correct operation.
Usage recommendations
Use the balancer only with matched 12V batteries installed in series to form a 24V bank. Avoid connecting the device to individual 12V batteries that are not part of a 24V series assembly. For optimal results, integrate the balancer into systems with regular charge sources and protect batteries from deep discharge and extreme temperatures.

## FAQ

### How much does the Voltage balancer QOLTEC 51097 for 24V batteries cost, and is it available for purchase?

The price is 24.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 25.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All QOLTEC products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized QOLTEC service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11558563/66562567_large.webp