300W automatic step up and down module. - For solar panel charging and battery charging. - 1 x Buck Boost Module. - Adjustable output: 1.4-79VDC. - Input: 7-80VDC. - Battery is not included. - LED constant current drive.
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ZK-SJ20 300W Automatic Step up Module Step down Module (with Display) for Solar Panel Charging MPPT. - 1 x Buck Boost Module. - Battery is not included. Usually it costs about 30USD-50USD.
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GREEN ENERGY, a solar holder system allows you to gain more independence from coal and gas suppliers. With the aluminium profile, you can fasten the rails or rails adapted for solar holders. Profile system.
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300W automatic step up and down module. - For solar panel charging and battery charging. - 1 x Buck Boost Module. - Adjustable output: 1.4-79VDC. - Input: 7-80VDC. - Battery is not included. - LED constant current drive.
eBay