Why do inverters display more power than meter readings?

Some people may find that their inverters display 15.3 degrees of power today, but only 14.5 degrees on the meter. A little difference in a day, accumulated over time, that’s a lot! So is the meter installed by the power supply company deliberately slowing it down? Of course not. Now let’s explain to you. There are two main reasons:

1.Causes of line loss: As the heart of photovoltaic, all DC power must be processed to 220V AC power, and then transmitted to the grid through the meter. Then it means that there is a line between the solar inverter and the meter. If there is a line, there must be loss. The size of the loss depends on the length of the line and the specifications of the wire, so it’s normal to make a little difference every day. But if there are many differences, it must be a problem.

2.The measurement problem: not that they measure differently, but the accuracy is not the same. Generally speaking, at present, the precision of our single-phase smart meter is about 1 s, which is 1%, and our inverters are about 0.5% error. So there are inherent differences in statistics between the two. The meter data statistics are inherently superior to the error value of inverter. Plus the line loss, all the power generation is less, also belongs to the normal range.


SSP3118C off grid solar inverter specifications 1-5KVA(solar off grid inverters)

1.Pure sine wave inverter
2.Cold start function
3.Auto restart while AC is recovering
4.Overload and short circuit protection
5.Optional remote panel available
6.Selectable charging current based on applications
7.Configurable AC/Solar input priority via LCD setting
8.Compatible to mains voltage or generator power
9.Smart battery charger design for optimized battery performance
10.Parallel operation with up to 6 units only available for 4KVA/5KVA
11.Selectable input voltage range for home appliances and personal computers

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