Blog

System voltage is not a battery spec, it is a system decision. One equation decides it, where each platform wins, the series/parallel rules you cannot break, and the inverter checks that prevent the most expensive mistake.

A cycle-life number is a test result, not a product property. The four conditions behind any claim, why depth of discharge and end-of-life definitions move the figure, calendar ageing, and how to specify cycle life in a purchase order.

Motive power is specified from the duty cycle backwards. The six inputs that decide the pack, energy vs power cells, opportunity charging, what really happens to regenerative braking near full charge, and the eight stages of an OEM programme.

IP65 is an ingress rating, not a marine guarantee. How to read the code, the four failures that actually end a marine battery, the alternator problem, cold-season charging limits, and how to specify salt-air corrosion protection.

Battery wiring is two problems - power and data. Cable sizing from current, length and voltage drop, plus what CAN vs RS485 actually means, why matching connectors do not guarantee communication, and when closed-loop is worth it.

What 48V really means for a LiFePO4 pack (51.2V nominal), when it is a genuine drop-in for lead-acid, the five checks that decide a golf cart conversion, and how to specify rack and backup systems.

Size a LiFePO4 battery from four inputs - average load, autonomy hours, usable depth of discharge and temperature. Worked examples, an application reference table, and the five mistakes most RFQs make.

A certification mark proves a specific model was tested to a specific standard — not that every pack from a factory is identical, and not how long it will last. What UL 1973, UL 9540A, IEC 62619, UN 38.3 and CE actually cover, and how to verify any claim.

A 5.12 kWh rack battery sold at $599 cannot be built the same way as one sold at $2,000. Where the money goes, which six levers move, and how to check the unit in front of you.

A 314Ah battery that measures 200Ah is usually not faulty. How capacity ratings are measured, the five causes of a shortfall, and a repeatable test you can run yourself.