{"product_id":"battery-tender-17w-solar-panel-charger-for-12v-batteries","title":"Battery Tender 17-Watt Solar Panel Charger and Maintainer, 12V","description":"\u003cp class=\"nvn-hero\"\u003eThe Battery Tender 17-watt solar panel charger keeps a 12-volt battery topped off with nothing but sunlight. It's a set-and-forget maintainer for boats, RVs, and powersports rigs, with a built-in 3-step automatic controller that handles AGM, gel, flooded, and LiFePO4 batteries.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eThe Battery Tender 17-watt solar panel charger is a hands-off way to keep a 12-volt battery topped off when the engine isn't running. It's built for boaters, RV owners, and anyone with a vehicle that sits between uses. You set it up once, point the panel at the sky, and it quietly feeds your battery whenever the sun's out. No wall outlet, no dragging an extension cord down the dock.\u003c\/p\u003e\n\u003cp\u003eInside the junction box is a real 3-step fully automatic charge controller, not just a bare panel wired to your terminals. It reads the battery and steps through bulk, absorption, and float, so you get a clean charge without cooking the cells. Max output is 3 amps, and it's compatible with AGM, gel, flooded lead-acid, and lithium iron phosphate (LiFePO4) batteries. That covers just about every 12V bank you'll find on a trailered boat or in a truck bed.\u003c\/p\u003e\n\u003cp\u003eOne thing we like: it doesn't force you to pick a battery chemistry and stick with it forever. The controller works across AGM, gel, flooded, and LiFePO4 packs, so if you upgrade your boat's cranking battery to lithium down the road, the same charger comes along. Lead-acid batteries in particular love a slow, steady float like this. Sitting at a proper float voltage instead of slowly self-discharging is what gets you five or six seasons out of a battery instead of three.\u003c\/p\u003e\n\u003cp\u003eHere's the honest part. A 17-watt panel is a maintainer, not a recovery charger. In good sun you'll see somewhere around an amp of real current, which is plenty to offset the slow parasitic drain from a bilge pump float switch, a stereo memory, or a chartplotter's backup. It'll hold a healthy battery at full charge through the offseason. What it won't do is bulk-charge a deeply discharged house bank in an afternoon. If your battery's already flat, get it up with a shore charger first, then let this keep it there.\u003c\/p\u003e\n\u003cp\u003eThe wiring's already sorted for you. You get a two-in-one cable with both alligator clips and a ring-terminal harness, so you can clip onto a battery on the bench or bolt the rings to your posts for a permanent install. A 6-foot quick-disconnect extension gives you room to route the panel up to a bimini top or a cabin roof and still reach the battery down below. The whole panel is slim, just 1.12 inches thick, so it lays flat on a console or deck without catching lines.\u003c\/p\u003e\n\u003cp\u003eIt carries an IP67 weather rating, which means it shrugs off rain and spray out on the water. We still tell folks to mount it where it gets a little airflow underneath and isn't sitting in standing water. Give the panel a clear shot at the sky, keep the connectors up out of any puddles, and it'll ride out a season without complaint.\u003c\/p\u003e\n\u003cp\u003eThe appeal of solar over a plug-in maintainer is simple. Boats on trailers, at moorings, or on the hard rarely sit next to an outlet. A solar maintainer goes wherever the boat goes and asks nothing of you. No timer, no reminder, no worry that you forgot to plug in before a three-week stretch away. As long as the sun comes up, your battery's getting fed.\u003c\/p\u003e\n\u003cp\u003eSo who's this for? Trailer-boat owners who want the battery ready on launch day. Sailors keeping a house bank alive on the mooring. RV and powersports folks whose rig sleeps in the driveway. If that's you, and you'd rather set it and forget it than remember to plug in a charger every few weeks, this Battery Tender solar charger earns its keep.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e17-watt solar panel delivers steady charging power from sunlight alone, no AC outlet required\u003c\/li\u003e\n  \u003cli\u003eBuilt-in 3-step fully automatic charge controller cycles through bulk, absorption, and float for a clean, safe charge\u003c\/li\u003e\n  \u003cli\u003e3 amp maximum charging current sized for maintenance and slow top-off duty\u003c\/li\u003e\n  \u003cli\u003eCompatible with AGM, gel, flooded lead-acid, and lithium iron phosphate (LiFePO4) 12V batteries\u003c\/li\u003e\n  \u003cli\u003eIP67 weather rating stands up to rain and spray on the water\u003c\/li\u003e\n  \u003cli\u003eTwo-in-one cable includes both alligator clips and a ring-terminal harness for bench or permanent hookup\u003c\/li\u003e\n  \u003cli\u003e6-foot quick-disconnect extension cable routes the panel to a bimini or cabin roof while reaching the battery below\u003c\/li\u003e\n  \u003cli\u003eSlim 1.12-inch profile lays flat on a console or deck without catching lines\u003c\/li\u003e\n  \u003cli\u003eMicroprocessor-controlled charging guards against overcharging on long unattended runs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Battery Tender reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill this fully charge a dead battery?\u003c\/summary\u003e\n    \u003cp\u003eNo. A 17-watt panel is a maintainer, not a recovery charger. It's built to hold a healthy battery at full charge and offset slow parasitic drain. If your battery is already flat, bring it up with a shore charger first, then let this keep it topped off.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use it with a lithium (LiFePO4) battery?\u003c\/summary\u003e\n    \u003cp\u003eYes. The controller supports lithium iron phosphate (LiFePO4) along with AGM, gel, and flooded lead-acid. That means you can keep the same charger if you upgrade a cranking or house battery to lithium later on.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs it waterproof enough for a boat?\u003c\/summary\u003e\n    \u003cp\u003eIt carries an IP67 weather rating, so it handles rain and spray. We still recommend mounting it where it gets airflow underneath and isn't sitting in standing water, and keeping the connectors up out of any puddles.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow much current does it actually put out?\u003c\/summary\u003e\n    \u003cp\u003eIt's rated up to 3 amps, but a 17-watt panel realistically delivers around an amp in good sun. That's plenty to offset the slow drain from a bilge float switch, stereo memory, or electronics backup and hold the battery full.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it come with a charge controller?\u003c\/summary\u003e\n    \u003cp\u003eYes. The 3-step automatic charge controller is built into the junction box, so it manages the charge for you and won't overcharge the battery on long unattended runs.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat comes in the box and how do I connect it?\u003c\/summary\u003e\n    \u003cp\u003eYou get the solar panel with its controller, a two-in-one cable with alligator clips and a ring-terminal harness, and a 6-foot quick-disconnect extension cable. Clip onto the battery for a quick hookup, or bolt the ring terminals to the posts for a permanent install.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I leave it connected all the time?\u003c\/summary\u003e\n    \u003cp\u003eYes. The automatic controller steps the charge down to a float once the battery is full, so it's designed to stay connected through the offseason without overcharging.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes it work on a 24-volt system?\u003c\/summary\u003e\n    \u003cp\u003eNo. This charger is built for 12-volt batteries only. Don't connect it to a 24V bank.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhere should I mount the panel?\u003c\/summary\u003e\n    \u003cp\u003eGive it a clear, unobstructed view of the sky, on a console, deck, cabin roof, or bimini top. The slim 1.12-inch panel lays flat, and the 6-foot extension cable gives you room to reach the battery down below.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eBattery Tender 17-Watt Solar Panel Charger and Maintainer, 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eBattery Tender\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e021-1173\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e734357117301\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSolar Panel Wattage\u003c\/th\u003e\n\u003ctd\u003e17 Watt\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBattery Voltage\u003c\/th\u003e\n\u003ctd\u003e12 Volt\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCompatible Battery Types\u003c\/th\u003e\n\u003ctd\u003eAGM, Gel, Flooded Lead-Acid, Lithium Iron Phosphate (LiFePO4)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaximum Charging Current\u003c\/th\u003e\n\u003ctd\u003e3 Amp\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCharging Stages\u003c\/th\u003e\n\u003ctd\u003e3-Step Fully Automatic\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePower Type\u003c\/th\u003e\n\u003ctd\u003eSolar Power Supply\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eWaterproof Rating\u003c\/th\u003e\n\u003ctd\u003eIP67\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePackage Dimensions (L x W x H)\u003c\/th\u003e\n\u003ctd\u003e14.76 in x 13.9 in x 1.12 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eIncluded Accessories\u003c\/th\u003e\n\u003ctd\u003eSolar Charge Controller, Two-In-One Alligator Clips and Ring Terminal Cable, 6 Foot Quick Disconnect Extension Cable\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will this fully charge a dead battery?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. A 17-watt panel is a maintainer, not a recovery charger. It's built to hold a healthy battery at full charge and offset slow parasitic drain. If your battery is already flat, bring it up with a shore charger first, then let this keep it topped off.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I use it with a lithium (LiFePO4) battery?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. The controller supports lithium iron phosphate (LiFePO4) along with AGM, gel, and flooded lead-acid. That means you can keep the same charger if you upgrade a cranking or house battery to lithium later on.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is it waterproof enough for a boat?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It carries an IP67 weather rating, so it handles rain and spray. We still recommend mounting it where it gets airflow underneath and isn't sitting in standing water, and keeping the connectors up out of any puddles.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How much current does it actually put out?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's rated up to 3 amps, but a 17-watt panel realistically delivers around an amp in good sun. That's plenty to offset the slow drain from a bilge float switch, stereo memory, or electronics backup and hold the battery full.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it come with a charge controller?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. The 3-step automatic charge controller is built into the junction box, so it manages the charge for you and won't overcharge the battery on long unattended runs.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What comes in the box and how do I connect it?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"You get the solar panel with its controller, a two-in-one cable with alligator clips and a ring-terminal harness, and a 6-foot quick-disconnect extension cable. Clip onto the battery for a quick hookup, or bolt the ring terminals to the posts for a permanent install.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I leave it connected all the time?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. The automatic controller steps the charge down to a float once the battery is full, so it's designed to stay connected through the offseason without overcharging.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does it work on a 24-volt system?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. This charger is built for 12-volt batteries only. Don't connect it to a 24V bank.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Where should I mount the panel?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Give it a clear, unobstructed view of the sky, on a console, deck, cabin roof, or bimini top. The slim 1.12-inch panel lays flat, and the 6-foot extension cable gives you room to reach the battery down below.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Battery Tender","offers":[{"title":"Default Title","offer_id":44996690509917,"sku":"2008026","price":206.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_30e0b546-0b75-4bb0-a0e0-263608415da4.jpg?v=1788630743","url":"https:\/\/nvnmarine.com\/products\/battery-tender-17w-solar-panel-charger-for-12v-batteries","provider":"NVN Marine","version":"1.0","type":"link"}