The term 15 kWh covers several different electrical platforms. Graspmart’s reference range includes 48 V 314 Ah, 51.2 V 300 Ah and 51.2 V 314 Ah configurations. Choosing between them requires more than comparing the rounded capacity.
Read the arithmetic
48 V × 314 Ah gives 15.072 kWh; 51.2 V × 300 Ah gives 15.36 kWh; 51.2 V × 314 Ah gives 16.0768 kWh. Each value describes nominal energy, not guaranteed usable AC energy.
Match the charging profile
The supplied reference documents list different charge limits: 54.75 V for the 48 V 314 Ah platform, 57.6 V for the 51.2 V 300 Ah platform, and 58.4 V for the 51.2 V 314 Ah platform. These values must not be copied between products. Confirm the final inverter settings from the approved manual.
Compare the physical package
The 300 Ah reference is listed at 880 × 448 × 260 mm and 118 kg. The two 314 Ah references use a listed 925 × 500 × 315 mm envelope but different weights. The final production drawing and handling plan should accompany the quotation.
Details to confirm
- Exact voltage and Ah rating
- Charge profile and communication
- Enclosure dimensions and net weight
- Current ratings stated on the same basis
Is the highest kWh always the best choice?
The correct inverter match, installation fit and supplied documents can matter more than a small difference in nominal energy.
Product and project review
See the related Graspmart battery specifications and compare the available capacities. Use the reference data to shortlist a platform, then confirm the exact production model, accessories and operating limits in the quotation.
Send the inverter model, destination, quantity and the requirements listed above through the project enquiry form. Include existing equipment details when the battery is being added to an installed system.
