{"product_id":"gama-sonic-solar-lighting-fixtures-replacement-battery-128v-3000mah-lifepo4","title":"Gama Sonic 12.8V Solar Lighting Replacement Battery GS12_8V60","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGama Sonic Solar Lighting Fixtures — 12.8V LiFePO4 Replacement Battery (GS12_8V60)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12.8V, 3000mAh LiFePO4 replacement battery for Gama Sonic solar lighting fixtures using OEM part number GS12_8V60. It stores solar energy during daylight and discharges at night to power the fixture. The battery measures 212.80 × 73.60 × 30.00mm — confirm physical dimensions match your fixture's battery compartment before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGS12_8V60 fixture compatibility:\u003c\/strong\u003e\n    Gama Sonic fixtures using this part number share a 12.8V LiFePO4 chemistry requirement. The BMS in these fixtures expects a 12.8V nominal cell voltage and will not accept lead-acid or standard lithium-ion cells — chemistry match matters as much as voltage here.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through solar charge and overnight discharge conditions on the bench. The BMS held charge cutoff correctly at 14.6V and low-voltage cutoff activated before cell damage could occur during deep discharge simulation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eSolar panel angle during charging:\u003c\/strong\u003e\n    Position the solar panel perpendicular to direct sunlight. Indirect or shaded light often generates insufficient current to clear the BMS minimum input threshold — the battery will not charge even in bright ambient conditions if panel output is too low.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the GS12_8V60 battery drains overnight after a full day of sun\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLiFePO4 cells require the panel to sustain input current above the BMS charge threshold for several consecutive hours to reach full state of charge. Partial sun, cloud cover, or a low panel angle can leave the battery at 60–70% capacity by dusk — not enough to run the fixture through a full dark cycle. The BMS does not show a low-charge warning; the light simply dims or cuts out early in the night. Check panel output voltage mid-afternoon — it should read above 17V open-circuit in direct sun to drive adequate charge current into a 12.8V cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery shows no response after sitting unused through winter\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLiFePO4 cells stored in a discharged state over months can fall below the BMS re-initialisation threshold, and the fixture will show no output — no light, no charge indicator. The BMS locks out to protect the cell from further discharge damage. Connect the battery directly to a LiFePO4-compatible charger at 14.6V and 1A for two hours before reinstalling it in the fixture. Once the cell voltage recovers above 10V, the BMS re-initialises and normal solar charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416175345754,"sku":"BWCS-GMS128LS-1","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416175378522,"sku":"BWCS-GMS128LS-2","price":116.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416175411290,"sku":"BWCS-GMS128LS-3","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GMS128LS-1.webp?v=1779760587","url":"https:\/\/batteryweb.com\/products\/gama-sonic-solar-lighting-fixtures-replacement-battery-128v-3000mah-lifepo4","provider":"BatteryWeb","version":"1.0","type":"link"}