Diesel Generator Rental

How to choose a generator set for the best value for money?

Many machines require a high starting current, typically 2-3 times their normal operating current, which means the generator set must be sized at least 2x, and sometimes 3x (for pumps). For example, a 12kW shredder would need a generator set of 2x to 2.5x, so a 30kW set would be ideal! However, this sizing is not based on the total load of all machines; rather, it primarily considers the top three highest load machines. This scenario assumes manual operation, where machines can be started one at a time. For simultaneous startup, a 2x ratio is recommended. Of course, as a diesel generator manufacturer, we do not recommend this approach due to its poor cost-effectiveness. We suggest sizing based on specific conditions, starting machines individually, and then calculating the required kW for the generator set. For instance, a farm's total equipment load is 53kW, with major loads being 24kW, 12kW, and 7.5kW. If a 2x ratio is used, a 120kW generator set would be needed for simultaneous startup. However, it's not necessary to start all at once. For this type of machinery, you can start the 24kW machine first, then the 12kW, and finally the 7.5kW. After the high-power machines are running, start the rest. In this case, a 75kW generator set would suffice. Some may not be able to calculate this, but it's simple: a 75kW generator set requires 2-3 times the current to start one machine, which is 48kW, sufficient for startup. After normal operation, there's 51kW left, then start the 12kW machine, requiring 24kW, sufficient for startup. After normal operation, there's 39kW left, then start the 7.5kW machine, requiring 15kW, sufficient for startup. After normal operation, there's 31.5kW left, and the total remaining load is 9.5kW, which is also sufficient for startup. So, all electrical equipment is started, and of course, the calculations are based on a 2x current factor, but the actual factor may vary between 2x, 2.5x, or 3x. Determine the actual factor based on the specific situation!