What is the typical electrolysis efficiency of electrolyzers?

A 600 m3/h water electrolysis hydrogen production system uses a 30% potassium hydroxide solution as the electrolyte. The electrolyzer has a pressure-filter type bipolar structure. How is the electrolytic efficiency of the electrolyzer determined?

The electrolysis efficiency of saline solution is generally between 93% and 96%; it is around 96% in the first year, with a decrease of more than 1% per year. The answer comes from luaf. Please invite @KangZhaoyang

Current efficiency is divided into anode efficiency and cathode efficiency, with the cathode efficiency generally being determined by the ratio of actual output to theoretical output. The anode efficiency is a bit more complicated, as it is calculated by measuring the components of fresh brine and gas. The efficiency of sodium-alkali anodes can exceed 97%, but it gradually decreases over time. As for the claim of a 1% decline per year, I don’t agree much with it; in my opinion, the decline in current efficiency varies depending on the operating conditions of each unit, so the rate of this decline also differs. As for potash, I haven’t had any experience with it, so I dare not speak rashly. Compared to sodium-based alkalis, potassium-based alkalis cause much greater normal wear and tear on ion membranes and electrolyzers. These are just my personal opinions; I welcome any criticism and suggestions from everyone.

According to the information, it has reached 4KW per cubic meter

There are really very few that can achieve alkalinity

The efficiency of hydrogen production through water electrolysis is generally between 50% and 80%