Solution for RV Energy Storage
In the RV energy storage system, the balance board, tester, and balance maintenance instrument are key components that ensure battery performance and extend system life. They work together to optimize the operational efficiency and safety of the energy storage system through different functions.
Active Balancer: the "guardian" of battery pack consistency
Core functions and principles：
The balance board balances the voltage, capacity, and SOC (state of charge) of individual cells in the battery pack through active or passive means, avoiding the "barrel effect" caused by differences in individual cells (overcharging/over-discharging of a single cell dragging down the entire battery pack).
Passive balancing: consuming the energy of high-voltage units through resistors, with a simple structure and low cost, suitable for small capacity RV energy storage systems.
Active balancing: transferring energy to low-voltage cells through inductors or capacitors, with high efficiency and low energy loss, suitable for large capacity lithium battery packs (such as lithium iron phosphate energy storage systems).
Practical Application：
Extend battery life: RV batteries are constantly in charge and discharge cycles, and individual differences can accelerate overall degradation. The balance board can control the voltage difference between individual cells within 5mV, increasing the lifespan of the battery pack by 20% to 30%.
Optimizing endurance: For example, when a certain RV is equipped with a 10kWh lithium battery pack and no balance board is used, the actual available capacity drops to 8.5kWh due to inconsistent individual units; After enabling active balancing, the available capacity was restored to 9.8 kWh.
Improving safety: Avoiding the risk of thermal runaway caused by overcharging of individual units, especially when the RV is parked for a long time or frequently charged and discharged, the effect is significant.
Typical product selection reference
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Technical Index |
Product Model |
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Applicable Battery Strings |
3S-4S |
4S-6S |
6S-8S |
9S-14S |
12S-16S |
17S-21S |
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Applicable Battery Type |
NCM/LFP/LTO |
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Working Range of Single Voltage |
NCM/LFP: 3.0V-4.2V |
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Voltage Equalization Accuracy |
5mv (typical) |
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Balanced Mode |
The whole group of battery participate in the active equalization of energy transfer at the same time |
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Equalizing Current |
0.08V differential voltage generates 1A balance current. The bigger the differential voltage, the bigger the balance current. The maximum allowable balance current is 5.5A. |
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Static Working Current |
13mA |
8mA |
8mA |
15mA |
17mA |
16mA |
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Product Size (mm) |
66*16*16 |
69*69*16 |
91*70*16 |
125*80*16 |
125*91*16 |
145*130*18 |
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Wordking Environment Temperature |
-10℃~60℃ |
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External Power |
No need for external power supply, relying on the internal energy transfer of the battery to achieve the whole group balance |
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Balanced Maintenance: Systematic Debugging and Maintenance Tools
Functional positioning：
Balanced maintenance equipment is a professional debugging device used for deep balancing of battery packs before leaving the factory or during maintenance. It can achieve:
Accurate calibration of individual voltage (accuracy up to ± 10mV);
Capacity testing and grouping (selecting battery packs composed of highly consistent individual cells);
Restoration balance of aging batteries (restoring partial capacity)
Application scenarios in RV energy storage：
Pre delivery commissioning of the new energy storage system: the motorhome manufacturer conducts initial assembly of the battery pack through the equalizing instrument, for example, to control the voltage difference of 200 cells within 30mV, so as to ensure the consistency of battery performance during delivery.
After sales maintenance and repair: If the range of the RV battery decreases after 1-2 years of use (such as from 300km to 250km), deep discharge balancing can be performed using a balancing instrument to restore 10% to 15% of the capacity.
Adaptation to modification scenarios: When RV users upgrade their energy storage systems themselves, balanced maintenance instruments can help screen second-hand batteries or reassemble old battery packs, reducing modification costs.
Through the collaborative application of balance board and balance maintenance devices, the RV energy storage system can achieve higher energy utilization efficiency, longer service life, and more reliable safety, especially suitable for long-distance travel or off grid living scenarios.
Contact Us
If you have purchasing intentions or cooperation needs for our products, please feel free to contact us at any time. Our professional team will be dedicated to serving you, answering your questions, and providing you with high-quality solutions.
Jacqueline: jacqueline@heltec-bms.com / +86 185 8375 6538
Nancy: nancy@heltec-bms.com / +86 184 8223 7713