How Do You Compare The Quality Of Solar Lights?

The main points summarizing the consumer perspectives on purchasing Product Two are as follows:

1. The remote control did not function effectively.
2. The LEDs on the main lamp did not provide adequate guidance.
3. Malfunctioning.
4. Product not bright.
5. Product only worked for one night.

Among these, points #1 and #2 are related to product design issues, which seem to be widespread problems. Judging from the number of reviews mentioning the product not working, it can be inferred that points #2 and #3 are probabilistic issues.

Second Product

The comments rated three stars or below for the Second product are as follows:

The main points summarizing the consumer perspectives on purchasing Product Two are as follows:

1. It takes two days for the solar lamp to fully charge.
2. The operation of the remote control is very inconvenient.
3. Charged for three days, but the lighting time is only 5-8 hours.
4. The product is too small.
5. Moisture inside the lamp.
6. Out of two products, one worked for one week, and the other worked for five months.
7. Water ingress.
8. Even with ample sunlight during the day, the lamp cannot sustain continuous operation at night.
9. Lumen value is very low.
10. Only worked for 4 months.
11. Only worked for 5 months.

#1 and #3 are considered critical batch issues. Remember our calculated charging time was only 2.71 hours? But consumers reported charging for 2-3 days. The most likely reason is that the seller overstated the parameters of the solar panel, meaning the actual wattage of the solar panel used in the product must be significantly lower than advertised.

#2 and #4 are product design problems. The seller did not design the product from the user’s perspective, so these are also batch issues.

#5 is a normal problem because there can be condensation due to temperature differences inside and outside the lamp. If the seller added a drainage hole, this problem could be resolved.

#7 Although water ingress is a common phenomenon, if it leads to the product not working, it’s a structural design problem. Due to variations in molds, it’s difficult to conclude whether this is a batch issue or a probabilistic issue.

#8 It’s likely a batch issue, but not necessarily a quality issue. Our calculation showed the product’s working time is only 2.56 hours, meaning consumers should adjust it to a suitable lighting mode. For example, keep it constantly lit for the first two hours, then switch to 0+PIR for the rest of the time. This way, power can be saved while achieving emergency lighting.

#9 It needs further classification based on actual situations. If the brightness remains low throughout the night, it’s a quality issue, perhaps the actual battery capacity is lower than advertised. If the brightness remains high for the first 1-2 hours and gradually dims, it’s a normal phenomenon.

#10 and #11 are critical batch issues. Considering other customer feedback, it’s likely the entire batch of batteries, solar panels, and PCBA from the seller are of poor quality, resulting in abnormally low lifespan. When encountering such products, it’s recommended to avoid them. With this analysis, we can also eliminate the second product now.