{"product_id":"renogy-rego-500a-combiner-box","title":"Renogy REGO 500A Combiner Box","description":"\u003ch2\u003eShort Product Summary\u003c\/h2\u003e\u003cp\u003eA 500A combiner box that turns the messiest part of a caravan electrical system — the pile of cables converging on the battery terminals — into a clean, enclosed, properly torqued busbar assembly. It carries tinned copper busbars of 4 × 30mm with M8 studs inside a sheet metal enclosure, is rated 9-60Vdc at 500A continuous, and measures 263 × 160 × 100mm at 2.6kg.\u003c\/p\u003e\u003ch2\u003eWhy This Product\u003c\/h2\u003e\u003cp\u003eOpen any caravan or off-road trailer battery box that has been added to over a few seasons and you will find the same thing: five or six lugs stacked on one battery post, a stud that has been retorqued so many times it no longer holds, and cable tails at every angle. It works, right up until a gravel road shakes something loose and you get a hot joint, a voltage drop, or worse.\u003c\/p\u003e\u003cp\u003eA combiner box solves that with hardware rather than hope. Every positive and negative cable lands on a proper tinned copper busbar with an M8 stud and a specified torque, inside a metal enclosure that keeps grit, tools and stray spanners away from live copper. Adding a second battery, an inverter, a DC-DC charger or a solar controller later becomes a five-minute job on a labelled stud instead of another lug on the pile.\u003c\/p\u003e\u003cp\u003eThe 500A rating is what makes it appropriate for a modern lithium system. Once you have a large LiFePO4 bank feeding an inverter, a fault current or an inverter surge is not a theoretical number — the copper has to be genuinely capable of it. 4 × 30mm tinned busbar is a serious cross-section, and tinned copper resists the corrosion that coastal Cape air and dusty Kalahari trips will otherwise work into a bare connection.\u003c\/p\u003e\u003cp\u003eBe clear about what it is, though: this is a distribution and connection point, not a fuse box. It combines and busses cable; it does not protect the circuits landing on it. Every branch off the busbar still needs its own correctly rated fuse or breaker. Fit it as part of a properly designed system and it is one of the highest-value, least glamorous upgrades you can make.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e500A continuous rating\u003c\/strong\u003e – sized for large lithium banks feeding inverters, where the current is real and not nominal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTinned copper busbars, 4 × 30mm\u003c\/strong\u003e – substantial cross-section, and tinned to resist the corrosion that coastal and dusty conditions cause on bare copper.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM8 stud terminals\u003c\/strong\u003e – standard lug size for heavy cable, torqued to 8 N·m so joints stay tight through gravel-road vibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9-60Vdc voltage range\u003c\/strong\u003e – suits 12V, 24V and 48V systems, so it does not become obsolete if you step the caravan up later.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosed sheet metal housing\u003c\/strong\u003e – keeps grit, dropped tools and curious hands away from live copper in a battery box or under a bunk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP22 protection rating\u003c\/strong\u003e – appropriate for an enclosed, protected installation location.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e-20°C to 60°C operating range\u003c\/strong\u003e – comfortable in a Kalahari battery box in summer and a Sutherland one in winter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact 263 × 160 × 100mm footprint\u003c\/strong\u003e – fits inside most caravan battery compartments or under-bunk electrical bays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTidy, expandable layout\u003c\/strong\u003e – add an inverter, a DC-DC charger or a second bank later without disturbing existing connections.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eIdeal For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCaravan and off-road trailer owners upgrading to a large lithium bank with an inverter\u003c\/li\u003e\n\u003cli\u003eAnyone tidying up a battery box that has grown five lugs deep on one terminal\u003c\/li\u003e\n\u003cli\u003eOverland and 4x4 canopy builds that need a clean, serviceable central connection point\u003c\/li\u003e\n\u003cli\u003eInstallers who want repeatable, torqued, inspectable joints rather than stacked lugs\u003c\/li\u003e\n\u003cli\u003eOwners planning to expand a 12V system in stages over several seasons\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eLocal Support from 4Matt Campers\u003c\/h2\u003e\u003cp\u003e4Matt Campers is a Renogy dealer in Cape Town, serving the Western Cape and delivering across South Africa. We build 12V systems on caravans, off-road trailers and campers, and a combiner box is one of the first things we specify when a system grows past a single battery and a solar controller.\u003c\/p\u003e\u003cp\u003eSend us a photo of your current battery box and a list of what is connected. We will tell you whether a 500A combiner is the right size, what cable and lug sizes you need, and — just as importantly — where the fusing has to go so the busbar is not carrying unprotected branches. If you are outside the Cape, we will spec the whole thing remotely and ship it.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel\u003c\/strong\u003e – REC500CB-98-G1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU\u003c\/strong\u003e – REC500CB-98-G1-SA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e – Renogy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated current\u003c\/strong\u003e – 500A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage range\u003c\/strong\u003e – 9-60 Vdc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector\u003c\/strong\u003e – M8 busbar studs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBusbar material\u003c\/strong\u003e – tinned copper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBusbar dimensions\u003c\/strong\u003e – 4 × 30 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended terminal torque\u003c\/strong\u003e – 8 N·m (70.8 in·lbs)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure material\u003c\/strong\u003e – sheet metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnclosure dimensions\u003c\/strong\u003e – 263 × 160 × 100 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit weight\u003c\/strong\u003e – 2.6 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection class\u003c\/strong\u003e – IP22\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating temperature\u003c\/strong\u003e – -20°C to 60°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage temperature\u003c\/strong\u003e – -40°C to 80°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHumidity\u003c\/strong\u003e – 0-99% RH, non-condensing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertification\u003c\/strong\u003e – RoHS compliant; manufactured in an ISO 9001 certified facility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's Included\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eRenogy 500A combiner box × 1\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eCable, lugs, fuses and mounting hardware are not included — they depend entirely on your system. We will quote the correct set alongside the box.\u003c\/p\u003e\u003ch2\u003eOptional Fitment \u0026amp; Upgrade Notes\u003c\/h2\u003e\u003cp\u003eFuse the branches, not the busbar. A combiner box is a connection point, not protection. Every circuit leaving it — inverter, DC-DC charger, solar controller, distribution to loads — needs its own correctly rated fuse or breaker as close to the busbar as practical, and the battery itself needs a main fuse or class-T device on the positive.\u003c\/p\u003e\u003cp\u003eMatch your cable and lugs to the M8 studs and to the actual current each branch will carry, not to what happens to be in the spares box. Undersized cable on a 500A-capable busbar is the classic mistake and it turns into a hot joint on a long gravel run.\u003c\/p\u003e\u003cp\u003eTorque properly at 8 N·m and use a torque wrench rather than judgement. Then check the joints again after your first couple of thousand kilometres of gravel — corrugations loosen everything, and a slightly loose 500A joint gets hot before it gets obvious. Label each stud while you are building, because in two years you will not remember which tail goes where.\u003c\/p\u003e\u003cp\u003eMount it somewhere protected, ventilated and reachable. IP22 means it is designed for an enclosed installation, not for being bolted to an exposed chassis rail where it will take road spray. A battery box, a nose cone or an under-bunk electrical bay is ideal.\u003c\/p\u003e\u003ch2\u003eComplete Your Setup\u003c\/h2\u003e\u003cp\u003eA combiner box is the hub; the rest of the system plugs into it. Add capacity from \u003ca href=\"\/collections\/lithium-batteries\"\u003eLithium Batteries\u003c\/a\u003e, harvest from \u003ca href=\"\/collections\/solar-panels\"\u003eSolar Panels\u003c\/a\u003e through a matched \u003ca href=\"\/collections\/solar-charge-controllers\"\u003eSolar Charge Controller\u003c\/a\u003e, and get the cable, lugs, fuses and breakers you need in \u003ca href=\"\/collections\/electrical-accessories\"\u003eElectrical Accessories\u003c\/a\u003e. Browse the complete \u003ca href=\"\/collections\/renogy\"\u003eRenogy\u003c\/a\u003e range to build the whole system on one ecosystem.\u003c\/p\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDoes the combiner box protect my circuits?\u003c\/strong\u003e\u003cbr\u003eNo. It combines and distributes, and it does not fuse anything. Each branch leaving the busbar still needs its own correctly rated fuse or breaker, and the battery needs a main protective device. Anyone who tells you otherwise is misreading what the product is.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 500A overkill for a caravan?\u003c\/strong\u003e\u003cbr\u003eNot once you are running a decent lithium bank with an inverter. Inverter surge and potential fault currents are what set the rating, not your everyday load. Buying headroom here is cheap compared to replacing a melted busbar, and it means the box survives your next upgrade.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it work on a 24V or 48V system?\u003c\/strong\u003e\u003cbr\u003eYes. It is rated 9-60 Vdc, so it covers 12V, 24V and 48V installations. That is worth knowing if there is any chance you will step the system up in future.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere should I mount it?\u003c\/strong\u003e\u003cbr\u003eSomewhere enclosed, ventilated and accessible — a battery box, nose cone or under-bunk electrical bay. Its IP22 rating means it is designed for a protected location, so do not bolt it to an exposed chassis rail where it will take road spray and grit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan 4Matt Campers supply the cable and fuses to go with it?\u003c\/strong\u003e\u003cbr\u003eYes. Send us a list of everything connecting to it and we will specify cable sizes, lug sizes, fuse ratings and mounting, and quote the lot as one job. We are in Cape Town, we cover the Western Cape and we deliver across South Africa.\u003c\/p\u003e","brand":"Renogy","offers":[{"title":"Default Title","offer_id":48299606638777,"sku":"REC500CB-98-G1-SA","price":4395.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/4587\/6409\/files\/2_01__95887.1711960836.1280.1280.jpg?v=1784793483","url":"https:\/\/www.4mattcampers.co.za\/products\/renogy-rego-500a-combiner-box","provider":"4Matt Campers","version":"1.0","type":"link"}