{"product_id":"25-watt-solar-battery-maintainer-for-dump-trailers-12v-hydraulic-systems","title":"25 Watt Solar Battery Maintainer for Dump Trailers \u0026 12V \u0026 24V Hydraulic Systems","description":"\u003cdiv class=\"pm-product-description\"\u003e\n\u003ch1\u003e25 Watt Solar Battery Maintainer for Dump Trailers \u0026amp; 12V Hydraulic Systems\u003c\/h1\u003e\n\u003ch3\u003eHigher Output for Faster Recovery \u0026amp; Stronger Battery Maintenance\u003c\/h3\u003e\n\u003cp\u003eParasitic draw is one of the most common reasons dump trailer batteries fail. Wireless remotes, hydraulic pumps, control modules, and small standby loads slowly drain the battery when the trailer sits idle.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003ePrimary Mover 25-Watt Solar Battery Maintainer\u003c\/strong\u003e is designed to go beyond minimum maintenance and provide \u003cstrong\u003estronger, more consistent charging\u003c\/strong\u003e in real dump trailer applications.\u003c\/p\u003e\n\u003cp\u003eWhile 18 watts is the minimum effective size for maintaining a battery, this 25W panel delivers \u003cstrong\u003eadditional charging capacity\u003c\/strong\u003e to help recover batteries faster and perform better in less-than-ideal conditions like cloudy weather, shaded parking, or winter months.\u003c\/p\u003e\n\u003cp\u003eThis system helps prevent deep discharge, sulfation, and premature battery failure — extending battery life and reducing downtime.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy 25 Watts Makes a Difference\u003c\/h2\u003e\n\u003cp\u003eMost trailer-mounted solar panels are installed flat and do not track the sun. Because of this, \u003cstrong\u003eefficiency losses of 20–30%\u003c\/strong\u003e are normal due to angle, weather, and location.\u003c\/p\u003e\n\u003cp\u003eWhile 18W is effective for maintenance, stepping up to 25W provides \u003cstrong\u003eextra amperage\u003c\/strong\u003e to better offset parasitic draw and maintain battery voltage more consistently.\u003c\/p\u003e\n\u003cp\u003eUnder real-world conditions, this panel can deliver roughly \u003cstrong\u003e1.5–2 amps of usable charge\u003c\/strong\u003e, giving you more margin and reliability over time.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e25 Watt Output\u003c\/strong\u003e — Increased charging capacity over standard maintenance panels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12V Battery Compatible\u003c\/strong\u003e — Designed for dump trailers and hydraulic power units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharge Controller Included\u003c\/strong\u003e — Regulates voltage and protects battery health\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Parasitic Draw When Idle\u003c\/strong\u003e — Controller does not drain the battery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat-Mount Friendly\u003c\/strong\u003e — Sized for real-world trailer efficiency losses\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrailer-Grade Construction\u003c\/strong\u003e — Built for harsh environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize\u003c\/strong\u003e - 25W 12V solar panel (15.0\" x 15.7\" x 0.12\").\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"25 watt solar panel manual.\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1169\/7506\/files\/12vdc_Solar_Manual_0001.pdf?v=1775230790\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e25 Watt Solar Charger Manual\u003c\/span\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003e(Click to expand)\u003c\/em\u003e\u003c\/p\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eDoes a solar panel need a charge controller?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eYes. A solar panel should always be used with a charge controller to regulate voltage and protect the battery from overcharging.\u003c\/p\u003e\n\u003cp\u003eThe controller included with this kit does \u003cstrong\u003enot\u003c\/strong\u003e create parasitic draw when idle.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eWhy choose 25 watts over 18 watts?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eWhile 18W is effective for maintaining a battery, 25W provides additional output for faster recovery and better performance in poor sunlight conditions.\u003c\/p\u003e\n\u003cp\u003eThis added capacity helps ensure your battery stays charged even with higher parasitic loads.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eWhat if I don’t have any parasitic draw?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eEven with nothing connected, a lead-acid battery will naturally self-discharge over time.\u003c\/p\u003e\n\u003cp\u003eTemperature changes and internal chemical reactions cause gradual voltage loss. That’s why batteries are commonly maintained with shore power or solar charging.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eWill this solar panel charge my battery?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eA 25W panel can typically provide \u003cstrong\u003eapproximately 1.5–2 amps\u003c\/strong\u003e under good conditions. This makes it more effective for maintaining and recovering batteries compared to smaller panels.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003e\u003cstrong\u003eWhat if I need faster charging?\u003c\/strong\u003e\u003c\/summary\u003e\n\u003cp\u003eIf you’re looking for faster recovery after heavy use, we recommend pairing solar maintenance with a charge-while-you-drive solution like the\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e \u003ca style=\"color: rgb(43, 0, 255);\" rel=\"noopener\" title=\"The RoaDCharger\" href=\"https:\/\/www.primarymover.com\/products\/roadcharger-7-way-connection\" target=\"_blank\"\u003e\u003cstrong\u003ePrimary Mover RoaDCharger\u003c\/strong\u003e.\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cbr\u003e\u003c\/details\u003e\n\u003chr\u003e\n\u003ch2\u003eBenefits of Choosing Primary Mover\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned specifically for dump trailer applications\u003c\/li\u003e\n\u003cli\u003eReal-world tested — not theoretical ratings\u003c\/li\u003e\n\u003cli\u003eHigh-quality components built for harsh environments\u003c\/li\u003e\n\u003cli\u003eExpert technical support from people who understand hydraulics\u003c\/li\u003e\n\u003cli\u003eTrusted by dump trailer owners nationwide\u003c\/li\u003e\n\u003cli\u003e12-Month Hassle-Free Warranty for peace of mind\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Primary Mover","offers":[{"title":"12vdc","offer_id":45016234098870,"sku":"PFS-25","price":179.0,"currency_code":"USD","in_stock":true},{"title":"24vdc","offer_id":45016234131638,"sku":"PFS-25-24V","price":199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1169\/7506\/files\/8_0e50f989-ae57-4f28-b9ba-1cd4587e5b93.jpg?v=1775484586","url":"https:\/\/www.primarymover.com\/fr\/products\/25-watt-solar-battery-maintainer-for-dump-trailers-12v-hydraulic-systems","provider":"Primary Mover","version":"1.0","type":"link"}