Most 52V batteries are built around the same aging 18650 cells, but the Ecovoltix 52V 20Ah uses the newer 21700 format. The 21700 provides more stored energy per cell, allows for greater current delivery, and operates at a lower temperature when subject to heavy loads. When combined with the 40A BMS as opposed to the 30A used in the majority of budget 52V batteries, the Ecovoltix 52V 20Ah battery provides much more capability than the budget packs. While there is a greater cost per watt hour associated with purchasing a premium pack such as the Ecovoltix 52V 20Ah, the cost of longevity far exceeds many of those savings. You can view how it compares to other ebike batteries on our battery comparison chart.
Specs and Cell Technology
The primary metric from Ecovoltix is 1500 wh of usable capacity. However, based upon typical calculations we would expect approximately 1040 wh of usable capacity from a 20 ah pack operating at 52 v. The slightly higher total capacity from Ecovoltix may represent either a slight increase in pack voltage or a peak voltage measurement. Regardless, the usable capacity appears to be within the 1040 to 1100 wh range under normal conditions. However, the true differentiator here is the utilization of 21700 format battery Cells.
Physical Dimensions
Physical dimensions for this pack appear to be approximately 14.96 x 3.74 x 3.94 inches. As expected due to the larger diameter of each cell (approximately 21 mm), the overall footprint of this pack is larger than what is normally seen from a 20 ah pack.
While both formats have cylindrical shapes, the new format measures larger than the traditional 18650 format. In addition to storing more energy, the larger 21700 Cells are capable of supplying more current and produce less heat buildup during sustained periods of high current draw. The XT60 connector on this pack is a very useful feature as it is commonly utilized on most aftermarket controller systems.
BMS and Motor Compatibility
Whereas virtually all of the budget 52V packs employ a 30 amp intelligent BMS, the Ecovoltix 52V 20Ah features a 40A intelligent BMS. Utilizing a BMS rated at twice that of every other competitor, this provides users with complete protection while providing ample headroom for sustained high current discharging to motors up to 1500 watts. With the superior BMS and 21700 Cells, this pack can operate at higher peak loads than packs utilizing the more outdated 18650 format, particularly on extended periods of climbing hills where excessive heat buildup occurs.
Ecovoltix indicates compatibility with Bafang, Voilamart, AW and similar motor kits. The inclusion of the XT60 plug-and-play connector simplifies setup for most conversions.
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Range and Charging
Typical range for a 52V 20 ah pack ranges from approximately 35 miles to as many as 50 miles. Due to improved voltage retention during operation, the range for this pack could potentially be increased further with the use of the newer 21700 Cells. Users employing motors ranging from approximately 750w to 1000W along with a combination of pedaling assistance and throttle control should be able to achieve minimums of 40+ miles of travel on flat to moderately hilly terrain. Commuters requiring travel distances between 15-20 miles daily may find that this pack will provide enough energy to meet their needs for two to three days prior to needing to recharge again.
Based upon manufacturer provided estimates, charging time for this pack is reportedly around six hours and forty minutes (6.9 hours), significantly quicker than most competitive products employing a two amp charger.
As mentioned previously, due to improved characteristics of the newer chemistry employed in the form of the 21700 Cells, this product’s longevity claims align well with actual results. Ecovoltix estimates a five year service life for this pack, commensurate with that experienced from the increased cycle life afforded by these newer Cells. Assume that approximately 1500 or more full charge/discharge cycles will occur prior to experiencing measurable capacity loss.
How 21700 Cells Compare to 18650 Cells
The newer format of lithium-ion battery cell referred to as the 21700 was developed primarily to replace older forms including the now ubiquitous 18650 format. While they maintain a similar shape to their predecessors, these newer format Cells exhibit improved properties:
- storage capacity: approximately 33% more energy is stored in each of these Cells.
- continuous discharge current: higher continuous current is available from these Cells at lower temperatures than can be achieved from comparable 18650 format Cells.
- thermal characteristics: these newer format Cells produce less heat under sustained high-current discharge conditions.
All of these characteristics contribute to reduced stress on individual components and result in longer lasting batteries.
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Who Should Buy This Battery
The Ecovoltix 52V 20Ah is a serious pick for high-power builds and riders who value cell quality and longevity.
Frequently Asked Questions
Is the Ecovoltix 52V 20Ah compatible with Bafang motors?
Ecovoltix specifically states that it offers Bafang compatible configurations. Since most Bafang branded controllers employ XT60 connectors for connection to aftermarket battery packs like this one, users can easily connect this pack to their Bafang branded controllers.
Can I use this battery on a 48V system?
No. While Ecovoltix markets their pack as suitable for use in a variety of configurations, charging and discharging limitations prevent safe use with existing systems rated at less than their maximum operating potential. Specifically, users cannot safely charge/discharge this pack to/from systems rated at less than 52 volts. Attempting to do so will result in significant potential for damaging electronic components.
Is the pack worth the premium over cheaper 52V options?
No. Ultimately, whether or not to purchase this pack based solely on price depends heavily upon user intended application of their ebike. The additional cost associated with purchasing a pack featuring superior technology (i.e., newer chemistry) and engineering (i.e., upgraded BMS design) only yields benefits in terms of longer useful service life if users intend to employ their ebikes for extended durations (typically exceeding several months).
Additionally, in cases where users require sustained high levels of power (e.g., climbing extremely steep inclines or carrying multiple passengers), the added capabilities provided by this pack will yield tangible benefits related to increased comfort and safety.
On the other hand, in scenarios involving lighter usage (e.g., short distance cruising or infrequent mountainous terrain), the added expense associated with this pack may not provide sufficient justification relative to alternative products currently available on the market.
Ultimately, careful consideration of specific needs and preferences will determine whether or not the premium associated with this pack represents reasonable compensation for enhanced performance.
Can I charge this battery with a solar panel?
Yes. However, care must be taken when connecting solar panels to your battery pack. You will need a solar charge controller producing dc current at approximately 58.8 volts (the maximum voltage at which this battery may safely be charged). Failure to properly regulate the output from your solar panels (and/or failing to appropriately limit charging current) will result in permanent damage to individual Cells and ultimately render your entire battery useless
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