Solid Power supplies high-quality batteries and other energy products to worldwide customers located in more than 100 countries. Furthermore, our German and Indonesian companies have their own office/warehouse which always keeps stocks to provide fast logistics and service to local clients. Moreover, In Germany, we also supply the whole solution for home use solar systems, camper van solar systems, etc. Besides our own overseas companies, we also built exclusive distributors in Malaysia, Yemen, Iraq, Mauritania, South Africa, Russia, Venezuela Honduras, and Costa Rica.
Q: What inverters can this LiFePO4 battery be used with?
A: SLPO series 48V LiFePO4 battery can be used with all inverters with a specified battery voltage of 48V, whether they can communicate with each other or not.
Since this battery cannot be connected in series, it cannot be used with HV inverters.
Communication between LiFePO4 battery and inverter can bring benefit, but even if they don't communicate, they can be used together. You can set the battery-related parameters (such as charging voltage, charging current, discharging cut-off voltage, etc.) on the inverter to manage battery charging and discharging.
Q: Can battery packs of the same specification purchased at different times be used?
A: The closer the production date and use date of the battery are, the smaller the difference in charge and discharge performance will be. The parallel connection of new and old batteries will inevitably lead to differences in charge and discharge performance. If there is no significant difference in their utilization rates (for example, the difference in the purchase time of the battery is within three months, and the old battery is not used frequently), they can be used in parallel. If there is a difference in performance after parallel connection, it has no effect on actual use.
Our customer has such an example: the customer bought two 48V 200AH battery energy storage systems and connected them in parallel within a few months. At first, their SOC differed by as much as 10%. We recommend that customers continue to use them and fully charge and discharge the batteries every few months to allow the chips to learn more fully. If one battery dies and the other has SOC remaining, there is no need to stop discharging. This is because batteries with remaining SOC will be discharged and empty batteries will be charged. The batteries are ready to charge when both batteries are discharged to 0%. If one of the batteries is fully charged and the other is not, simply wait until all batteries are fully charged. After a while, the client can see that the difference between them gradually decreases.
If the purchase time and frequency of use of the two batteries are very different, we do not recommend using them in parallel.
Q: If this battery has the same size, can it be connected to other brands of batteries?
A: This is not feasible, and there will be great risks. They look similar because they use a standard case, but their internal design can vary widely, for example between batteries and between BMS.
Q: After using it for a long time, I found that the SOC displayed on the battery LCD is not accurate. Does this mean that the battery capacity will be reduced?
A: After long-term frequent use of lithium iron phosphate batteries, normal capacity fading will occur. But in our experience, the SOC inaccuracy you describe is usually not due to capacity reduction, but rather due to an uncalibrated SOC. The SOC of our SLPO series lithium iron phosphate batteries needs to be calibrated using 100% depth of discharge. If the battery is not fully charged and discharged for a long time, there will be some deviation in SOC. Therefore, we recommend that the battery pack be fully charged and discharged every few months (i.e. discharge 100% SOC to 0% SOC and then fully charge the battery pack), so that the chip can record the actual maximum capacity of the battery pack, so that the battery pack can Calculate SOC for calibration.
