{"product_id":"go-power-sc-db-mppt-40-40a-mppt-solar-controller","title":"Go Power SC-DB-MPPT-40 40A MPPT Solar Charge Controller","description":"\u003cp class=\"nvn-hero\"\u003eThe Go Power SC-DB-MPPT-40 is a 40-amp MPPT solar charge controller that runs both 12-volt and 24-volt battery banks. It pulls the most out of your panels with true maximum power point tracking, handles up to 900 watts of solar, and guards your batteries with five layers of built-in fault protection. A solid brain for any RV, boat, or off-grid setup.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eA solar array is only as good as the controller sitting between your panels and your batteries, and the Go Power SC-DB-MPPT-40 is the part that does the thinking. It's a 40-amp MPPT charge controller, and MPPT is the piece that matters here. Maximum power point tracking constantly adjusts the load on your panels to pull out every usable watt, which typically nets you 15 to 30 percent more charge than an older PWM controller manages on the same array. On a cloudy morning or a cold, bright afternoon, that difference is real.\u003c\/p\u003e\n\u003cp\u003eWhat makes this one flexible is that it handles both 12-volt and 24-volt battery banks. Wire it to a 12-volt house bank on your RV or boat, or step up to 24 volts for a bigger off-grid setup, and the controller sorts out the system voltage. With 40 amps of charge current and up to 900 watts of solar input, it's sized right for a mid-range array. Think 400 to 600 watts of panels on a 12-volt bank, or roughly double that on 24 volts. That covers most weekend rigs, liveaboard boats, and cabin systems without overbuilding.\u003c\/p\u003e\n\u003cp\u003eThe operating voltage range runs from 8 to 32 volts, so it keeps working when your panels are running hot and their voltage sags, or when it's cold out and they spike. The whole unit is rated from -40 to 140 degrees Fahrenheit, which means it'll ride out an Arizona summer or a Minnesota winter without complaint. That said, heat is still the enemy of any charge controller. Mount it vertically on a cool interior wall with some air space above and below, not crammed into a sealed, hot compartment.\u003c\/p\u003e\n\u003cp\u003eProtection is where this controller earns its keep. It's got five safeguards built in: reverse polarity protection in case you cross the battery leads, over temperature protection that backs off the charge when it runs hot, internal overvoltage protection, PV overcurrent protection on the solar side, and reverse current protection that stops your batteries from draining back through the panels at night. Wiring solar is where a lot of first-timers make an expensive mistake, and these guards give you a real margin for error.\u003c\/p\u003e\n\u003cp\u003ePhysically it's a compact unit, 7.55 inches long by 6.97 inches wide and 2.6 inches deep, so it tucks into a battery bay or an electrical locker without eating up your whole wall. It's FCC Part 15 Class B and RoHS compliant, so it won't throw interference into your radio or electronics and it meets the standard environmental rules. Keep your wire runs from the panels short and use the right gauge for 40 amps, and you'll hold onto the efficiency the MPPT circuit works so hard to gain.\u003c\/p\u003e\n\u003cp\u003eA quick word on sizing, because it trips people up. The 900-watt rating and the 40-amp output describe two different limits, and you're always bound by the lower one for your system. On a 12-volt bank, 40 amps of charge current works out to somewhere around 500 to 600 watts of panel before you hit the ceiling. Step up to a 24-volt bank and that same 40 amps carries roughly double the wattage, which is why the 900-watt number shows up. So if you're planning a large array, run the math on your actual battery voltage first. It's cheaper to plan it right than to add panels the controller can't use.\u003c\/p\u003e\n\u003cp\u003eWho's this for? Anyone adding or upgrading solar on an RV, a boat, a van, or a cabin who wants MPPT efficiency without a complicated install. Who's it not for? If you're running a big 1,000-watt-plus array or a 48-volt bank, you've outgrown this one and want a larger controller. Match the controller to your array and you'll get years of quiet, efficient charging out of it. Solar's one of the best upgrades you can make to a rig or a boat, and the controller is the piece that makes the whole system pay off.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e40-amp MPPT charge current, so you get 15 to 30 percent more usable power from the same panels than a PWM controller pulls\u003c\/li\u003e\n  \u003cli\u003eRuns both 12-volt and 24-volt battery banks from one unit, so it fits an RV house bank or a larger off-grid system\u003c\/li\u003e\n  \u003cli\u003eUp to 900 watts of solar input, sized for mid-range arrays around 400 to 600 watts on 12V or double that on 24V\u003c\/li\u003e\n  \u003cli\u003e8 to 32 volt operating range keeps charging when panels run hot or cold and their output shifts\u003c\/li\u003e\n  \u003cli\u003eRated -40 to 140 degrees Fahrenheit, so it holds up in desert heat and hard winters alike\u003c\/li\u003e\n  \u003cli\u003eFive-layer protection covering reverse polarity, over temperature, internal overvoltage, PV overcurrent, and reverse current\u003c\/li\u003e\n  \u003cli\u003eReverse current protection stops battery drain back through the panels after dark\u003c\/li\u003e\n  \u003cli\u003eCompact 7.55 x 6.97 x 2.6 inch body tucks into a battery bay or electrical locker\u003c\/li\u003e\n  \u003cli\u003eFCC Part 15 Class B and RoHS compliant, so it won't interfere with your radio or electronics\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 Go Power 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\u003eDoes the SC-DB-MPPT-40 work with both 12-volt and 24-volt batteries?\u003c\/summary\u003e\n    \u003cp\u003eYes. It supports 12-volt and 24-volt battery banks, so you can wire it to a standard RV or boat house bank or step up to a 24-volt off-grid system, and it sorts out the system voltage.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow many watts of solar can I connect?\u003c\/summary\u003e\n    \u003cp\u003eUp to 900 watts. On a 12-volt bank the 40-amp output caps you around 500 to 600 watts of panel, while a 24-volt bank lets that same 40 amps carry close to the full 900 watts.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat's the advantage of MPPT over a PWM controller?\u003c\/summary\u003e\n    \u003cp\u003eMPPT, or maximum power point tracking, constantly tunes the load on your panels to harvest the most available power. That's typically 15 to 30 percent more than a PWM controller manages on the same array, especially in cold or partly cloudy conditions.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat's the maximum charge current?\u003c\/summary\u003e\n    \u003cp\u003e40 amps. That's the hard ceiling on how much current it pushes into your battery bank, regardless of how many watts of panel you have.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it protect my batteries if I wire something backwards?\u003c\/summary\u003e\n    \u003cp\u003eIt has reverse polarity protection on the battery side, plus over temperature, internal overvoltage, PV overcurrent, and reverse current protection. Five safeguards in total. Always follow the manual, but those guards give you real margin for error.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhere should I mount it?\u003c\/summary\u003e\n    \u003cp\u003eMount it in a dry, ventilated interior spot like a battery bay or electrical locker. It's rated to operate from -40 to 140 degrees Fahrenheit, but like any charge controller it runs best with air space above and below so it can shed heat.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat size system is this controller best for?\u003c\/summary\u003e\n    \u003cp\u003eIt fits mid-range setups, roughly 400 to 600 watts of panel on a 12-volt bank or up to about 900 watts on 24 volts. If you're running a 1,000-watt-plus array or a 48-volt bank, you've outgrown it and want a larger controller.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it interfere with my radio or electronics?\u003c\/summary\u003e\n    \u003cp\u003eIt's FCC Part 15 Class B and RoHS compliant, which means it's built to keep electrical interference low, so it plays nice with your onboard radio, GPS, and other electronics.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the dimensions?\u003c\/summary\u003e\n    \u003cp\u003e7.55 inches long, 6.97 inches wide, and 2.6 inches deep. Compact enough to tuck into most battery bays or electrical lockers.\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\u003eGo Power SC-DB-MPPT-40 40A MPPT Solar Charge Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eGo Power\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e83839\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e839085009499\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eSC-DB-MPPT-40\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCharge Controller Type\u003c\/th\u003e\n\u003ctd\u003eMPPT (Maximum Power Point Tracking)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBattery System Voltage\u003c\/th\u003e\n\u003ctd\u003e12V or 24V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaximum Charge Current\u003c\/th\u003e\n\u003ctd\u003e40 Amps\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaximum Solar Input\u003c\/th\u003e\n\u003ctd\u003e900 Watts\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOperating Voltage Range\u003c\/th\u003e\n\u003ctd\u003e8 to 32 Volts\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDimensions (L x W x H)\u003c\/th\u003e\n\u003ctd\u003e7.55 in x 6.97 in x 2.6 in\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOperating Temperature Range\u003c\/th\u003e\n\u003ctd\u003e-40 to 140 degrees Fahrenheit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eReverse Polarity Protection\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOver Temperature Protection\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eInternal Overvoltage Protection\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePV Overcurrent Protection\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eReverse Current Protection\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCompliance\u003c\/th\u003e\n\u003ctd\u003eFCC Part 15 Class B, RoHS Compliant\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\": \"Does the SC-DB-MPPT-40 work with both 12-volt and 24-volt batteries?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. It supports 12-volt and 24-volt battery banks, so you can wire it to a standard RV or boat house bank or step up to a 24-volt off-grid system, and it sorts out the system voltage.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How many watts of solar can I connect?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Up to 900 watts. On a 12-volt bank the 40-amp output caps you around 500 to 600 watts of panel, while a 24-volt bank lets that same 40 amps carry close to the full 900 watts.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What's the advantage of MPPT over a PWM controller?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"MPPT, or maximum power point tracking, constantly tunes the load on your panels to harvest the most available power. That's typically 15 to 30 percent more than a PWM controller manages on the same array, especially in cold or partly cloudy conditions.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What's the maximum charge current?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"40 amps. That's the hard ceiling on how much current it pushes into your battery bank, regardless of how many watts of panel you have.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it protect my batteries if I wire something backwards?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It has reverse polarity protection on the battery side, plus over temperature, internal overvoltage, PV overcurrent, and reverse current protection. Five safeguards in total. Always follow the manual, but those guards give you real margin for error.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Where should I mount it?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Mount it in a dry, ventilated interior spot like a battery bay or electrical locker. It's rated to operate from -40 to 140 degrees Fahrenheit, but like any charge controller it runs best with air space above and below so it can shed heat.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What size system is this controller best for?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It fits mid-range setups, roughly 400 to 600 watts of panel on a 12-volt bank or up to about 900 watts on 24 volts. If you're running a 1,000-watt-plus array or a 48-volt bank, you've outgrown it and want a larger controller.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it interfere with my radio or electronics?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's FCC Part 15 Class B and RoHS compliant, which means it's built to keep electrical interference low, so it plays nice with your onboard radio, GPS, and other electronics.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What are the dimensions?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"7.55 inches long, 6.97 inches wide, and 2.6 inches deep. Compact enough to tuck into most battery bays or electrical lockers.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Go Power","offers":[{"title":"Default Title","offer_id":44996321411165,"sku":"2007571","price":262.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_42159a75-6b05-4c95-b2b8-cfadf28494cd.png?v=1788623491","url":"https:\/\/nvnmarine.com\/products\/go-power-sc-db-mppt-40-40a-mppt-solar-controller","provider":"NVN Marine","version":"1.0","type":"link"}