Preamble
Solar Bulb.
ie., a bulb that coulld be charged via solar panels.
It isn't easy to find a cost-effective solar panel at a reasonable low price on any commerce platform.
And even it isn't easy to get usable current and wattages from such low-proced little panels.
This article deals with a cost-effective solar panel of 5 volts,
which is being accompanied by a rechargeable electrical bulb, on fixing flaws, reinforcing vulnerable features
and customizing some if needed.
Then, here we go~:
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1st buy:
A white solar panel with a rechargeable bulb:- Panel: smaller than expected.
- 5 lighting modes: three brightness adjustments and two blinking modes with different blinking intervals.
- Cable length: more than 2.5 meters. It could charge other lamps of similar specifications.
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2nd buy:
Of the three ordered, one bulb was defective. It has gone awry after few minutes when its was plugged into an electronic socket for charging with a fine-working charger. Turned off by itself. Considerable heat was felt from its bottom. Post-symptoms: The last has disappeared completely from 5 available lighting modes(slow blinking:SOS). And its green light started to blink as if it was being charged whenever it was turned on without any charging tasks. But again, the green light did not misbehave as such any more after few hours. Something must has gone wrong obviously but I could not pin-point the exact cause or parts. The 3 solar panels and other two bulbs work fine. A single panel's output under moderate sunny day sunlight was 0.08A. Usable performance. It would be nicer if its cable is sturdier. It is too fragile. With few little bending moves, does it easily split as shown in my images.
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Connected 3 solar panels and tested it under bright sunlight on a sunny day. The result was good: As each has its capability as 0.08A the total capacity of the three were 0.24A which brought about 1Watt electronic power output: (0.08A x3 = 0.24A, 0.24A x 4.5V = 1.08W)
Next, 4 of the panels will be combined as one in parallel for more wattage and be tested. Ultimately two sets of this four-as-one panel will be established on a board to get two or three Watts for usable everyday charging tasks.
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3rd buy:
The 5th item of the product but I plan to buy more onwards. Its solar panel's performance is way better than I have been expecting with a bulb having usable amount of capacity at about 1300mAh. With this as last for a set of four, have I connected 4 of the solar panels as one in parallel to get quadruple Wattage from them, i.e., to get better speed on charging a device.
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4 as 1 in parallel. These combined 4 panels exerted about 0.3A, 1.5W in average and 0.37A 1.7W maximum under broad daylight in bright sunny days. Quite good performance for solar charging.
Next, it will be tested for 8 as 1 as soon as I buy a few more of these. This product has given me a high expectation on the scheduled combined performance of 8. It might well be even possible to charge a power bank in two or three days under broad daylight with the combination of 8 of them. Very promising.
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4th buy:
I ordered two more lacking in one from my scheduled purchase of 3 on account of the current limit of my budget.
I need to buy 1 more for perfect 8 later on. And maybe even more afterwards.
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Tested the solar-charging panels with combined 7 as 1 in parallel under bright sunny days and the result was quite satisfactory.
It took about 12 hours to reach 100% from about 50% left to charge a power bank of six 18650 batteries and about 23 hours and 30 minutes from 0% to 100%. So it could be safely asserted that the panels combined 7 as 1 charge a power bank of 9000mAh in two bright days.
BTW, it was a good experience and fun to get satisfactory results from the combination.
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Fixing and enhancing its cable:
However, its cable was quite weak compapred with other common cables.
Few of them were alreay cut or split on arrival. It needs some fixes and enhancements for durable and carefree uses. A glue gun was used to conceal the cuts on a cable and to fix the cable inside its corresponding panel:
Done!
That's all for these white solar panels.
Enjoy using them: The 7-as-1 panel could charge a power bank of about 10000mAh in two or three days under fair sunny weather.
That's all for these white solar panels.
Enjoy using them: The 7-as-1 panel could charge a power bank of about 10000mAh in two or three days under fair sunny weather.
The author hereby clearly enunciate that any error, damage or loss to the reader
arising from the reader's tasks by following this tutorial
is assumed by the reader.
In no cases would the author be held responsible for such occurrences, damages
or loss of whatsoever.
So, please be careful following and performing any task based on this article.
BTW, thanks for your referring to mine. Have fun!
Late update: May 31, 2024. GMT 09:00.
EOD
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