{"product_id":"wced-solar-pv-combiner-boxes-1000v-dc","title":"WCED Solar PV Combiner Boxes — 1000V DC","description":"\u003cstyle\u003e\n.eh-container{max-width:1100px;margin:auto;padding:60px 20px;font-family:-apple-system,BlinkMacSystemFont,sans-serif}\n.eh-breadcrumb{font-size:13px;color:#6b7280;margin-bottom:28px;display:flex;align-items:center;flex-wrap:wrap;gap:4px}\n.eh-breadcrumb a{color:#10b981;text-decoration:none;font-weight:500}\n.eh-breadcrumb a:hover{text-decoration:underline}\n.eh-breadcrumb__sep{color:#d1d5db;margin:0 2px}\n.eh-highlight{background:#ecfdf5;border-left:5px solid #10b981;padding:20px;border-radius:10px;margin-bottom:25px;font-size:18px}\n.eh-text{margin:20px 0;line-height:1.7;color:#374151}\n.eh-icon-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:15px;margin:25px 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#e5e7eb;border-radius:12px;padding:18px;background:#fff;transition:.2s}\n.eh-variant:hover{border-color:#10b981}\n.eh-variant__sku{font-family:monospace;font-size:12px;color:#6b7280;margin-bottom:6px}\n.eh-variant__name{font-size:15px;font-weight:700;color:#111827;margin-bottom:8px}\n.eh-variant__price{font-size:22px;font-weight:800;color:#10b981;margin-bottom:4px}\n.eh-variant__vat{font-size:12px;color:#6b7280;margin-bottom:12px}\n.eh-variant a{display:block;text-align:center;background:#10b981;color:#fff;padding:10px;border-radius:8px;text-decoration:none;font-weight:700;font-size:14px}\n.eh-comparison-note{font-size:13px;color:#6b7280;font-style:italic;margin-top:6px}\n\u003c\/style\u003e\n\n\u003csection class=\"eh-container\"\u003e\n\n\u003cnav class=\"eh-breadcrumb\"\u003e\n  \u003ca href=\"https:\/\/ecoharmony.co.uk\"\u003eHome\u003c\/a\u003e\n  \u003cspan class=\"eh-breadcrumb__sep\"\u003e›\u003c\/span\u003e\n  \u003ca href=\"https:\/\/ecoharmony.co.uk\/pages\/electrical-safety-knowledge-base\"\u003eElectrical Safety Knowledge Base\u003c\/a\u003e\n  \u003cspan class=\"eh-breadcrumb__sep\"\u003e›\u003c\/span\u003e\n  \u003ca href=\"https:\/\/ecoharmony.co.uk\/collections\/wced-products\"\u003eWCED Products\u003c\/a\u003e\n  \u003cspan class=\"eh-breadcrumb__sep\"\u003e›\u003c\/span\u003e\n  Solar Combiner Boxes\n\u003c\/nav\u003e\n\n\u003ch1\u003eWCED Solar PV Combiner Boxes — 1000V DC\u003c\/h1\u003e\n\n\u003cdiv class=\"eh-highlight\"\u003e\n\u003cstrong\u003eString protection, DC isolation, and Type 2 surge protection in one weatherproof unit.\u003c\/strong\u003e The WCED WMPV and WPPV series sit between your PV array and inverter, providing everything needed for compliant, safe DC string protection — in metal or polycarbonate IP65 enclosures.\n\u003c\/div\u003e\n\n\u003cdiv class=\"eh-text\"\u003e\n\u003cp\u003eA solar combiner box does three things that matter: it brings one or two PV string cables to a single organised connection point, it provides a safe DC disconnect so the inverter can be isolated without touching the array, and it absorbs surge energy from lightning-induced overvoltages in the string cables before they can reach the inverter's sensitive DC input electronics.\u003c\/p\u003e\n\u003cp\u003eThe WCED range covers the most common domestic and light commercial configurations — 1-string and 2-string, in metal and polycarbonate enclosures — all rated to 1000V DC and supplied ready to install.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eChoose your model\u003c\/h2\u003e\n\n\u003cdiv class=\"eh-variant-grid\"\u003e\n\n  \u003cdiv class=\"eh-variant\"\u003e\n    \u003cdiv class=\"eh-variant__sku\"\u003eWMPV-1S1\u003c\/div\u003e\n    \u003cdiv class=\"eh-variant__name\"\u003e1-String Metal\u003cbr\u003eIP65 · 1000V DC\u003c\/div\u003e\n    \u003cdiv class=\"eh-variant__price\"\u003e£72.00\u003c\/div\u003e\n    \u003cdiv class=\"eh-variant__vat\"\u003eex. VAT · £86.40 inc. VAT\u003c\/div\u003e\n    \u003ca href=\"https:\/\/ecoharmony.co.uk\/collections\/wced-products\"\u003eAdd to basket\u003c\/a\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"eh-variant\"\u003e\n    \u003cdiv class=\"eh-variant__sku\"\u003eWMPV-2S2\u003c\/div\u003e\n    \u003cdiv class=\"eh-variant__name\"\u003e2-String Metal\u003cbr\u003eIP65 · 1000V DC\u003c\/div\u003e\n    \u003cdiv class=\"eh-variant__price\"\u003e£112.00\u003c\/div\u003e\n    \u003cdiv class=\"eh-variant__vat\"\u003eex. VAT · £134.40 inc. VAT\u003c\/div\u003e\n    \u003ca href=\"https:\/\/ecoharmony.co.uk\/collections\/wced-products\"\u003eAdd to basket\u003c\/a\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"eh-variant\"\u003e\n    \u003cdiv class=\"eh-variant__sku\"\u003eWPPV-1S1\u003c\/div\u003e\n    \u003cdiv class=\"eh-variant__name\"\u003e1-String Plastic\u003cbr\u003eIP65 · 1000V DC\u003c\/div\u003e\n    \u003cdiv class=\"eh-variant__price\"\u003e£68.00\u003c\/div\u003e\n    \u003cdiv class=\"eh-variant__vat\"\u003eex. VAT · £81.60 inc. VAT\u003c\/div\u003e\n    \u003ca href=\"https:\/\/ecoharmony.co.uk\/collections\/wced-products\"\u003eAdd to basket\u003c\/a\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"eh-variant\"\u003e\n    \u003cdiv class=\"eh-variant__sku\"\u003eWPPV-2S2\u003c\/div\u003e\n    \u003cdiv class=\"eh-variant__name\"\u003e2-String Plastic\u003cbr\u003eIP65 · 1000V DC\u003c\/div\u003e\n    \u003cdiv class=\"eh-variant__price\"\u003e£115.00\u003c\/div\u003e\n    \u003cdiv class=\"eh-variant__vat\"\u003eex. VAT · £138.00 inc. VAT\u003c\/div\u003e\n    \u003ca href=\"https:\/\/ecoharmony.co.uk\/collections\/wced-products\"\u003eAdd to basket\u003c\/a\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cp class=\"eh-comparison-note\"\u003eAll prices ex. VAT. Same-day dispatch on stock lines. Competitor equivalent (Electrical4less WPPV-1S1): £71.21 ex. VAT.\u003c\/p\u003e\n\n\n\u003ch2\u003eWhat's inside every combiner box\u003c\/h2\u003e\n\n\u003cdiv class=\"eh-icon-list\"\u003e\n  \u003cdiv class=\"eh-icon\"\u003e45A DC rotary isolator — safe disconnection without touching array\u003c\/div\u003e\n  \u003cdiv class=\"eh-icon\"\u003eDC fuse holder with 15A fuse per string — string overcurrent protection\u003c\/div\u003e\n  \u003cdiv class=\"eh-icon\"\u003eType 2 DC SPD — 20kA\/40kA, 1000V rated\u003c\/div\u003e\n  \u003cdiv class=\"eh-icon\"\u003eIP65 IK10 enclosure — weatherproof, impact resistant\u003c\/div\u003e\n  \u003cdiv class=\"eh-icon\"\u003eCable gland entries — maintain IP65 rating\u003c\/div\u003e\n  \u003cdiv class=\"eh-icon\"\u003eDIN rail mounted internally — EN 61439-2\/3 compliant\u003c\/div\u003e\n\u003c\/div\u003e\n\n\n\u003ch2\u003eMetal vs plastic — which should I choose?\u003c\/h2\u003e\n\n\u003ctable class=\"eh-table\"\u003e\n\u003ctr\u003e\n  \u003cth\u003eFeature\u003c\/th\u003e\n  \u003cth\u003eMetal (WMPV)\u003c\/th\u003e\n  \u003cth\u003ePlastic polycarbonate (WPPV)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n  \u003ctd\u003e—\u003c\/td\u003e\n  \u003ctd\u003e\u003cstrong\u003eIP65 steel enclosure\u003c\/strong\u003e\u003c\/td\u003e\n  \u003ctd\u003e\u003cstrong\u003eIP65 polycarbonate enclosure\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n  \u003ctd\u003e—\u003c\/td\u003e\n  \u003ctd\u003eHigher mechanical protection — IK10\u003c\/td\u003e\n  \u003ctd\u003eLightweight, corrosion-resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n  \u003ctd\u003e—\u003c\/td\u003e\n  \u003ctd\u003eBetter for commercial or exposed locations\u003c\/td\u003e\n  \u003ctd\u003eIdeal for domestic external walls and roof spaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n  \u003ctd\u003e—\u003c\/td\u003e\n  \u003ctd\u003eNon-conductive internal DIN rail\u003c\/td\u003e\n  \u003ctd\u003eFully non-conductive body — no bonding required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n  \u003ctd\u003e—\u003c\/td\u003e\n  \u003ctd\u003eSlightly heavier — more robust feel\u003c\/td\u003e\n  \u003ctd\u003eUV stabilised — suitable for direct sun exposure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cdiv class=\"eh-text\"\u003e\n\u003cp\u003eFor most domestic rooftop or outbuilding installations, either enclosure type is suitable. The plastic WPPV is the most popular choice for domestic use — lighter, inherently non-conductive, and UV stabilised. The metal WMPV is preferred for more exposed commercial locations or where a higher level of mechanical protection is specified.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\n\u003ch2\u003e1-string vs 2-string — which do I need?\u003c\/h2\u003e\n\n\u003cdiv class=\"eh-text\"\u003e\n\u003cp\u003eThe string count refers to how many independent PV string cables connect into the combiner box. On a typical domestic installation with a single MPPT inverter and one string of panels, a 1-string (1S1) unit is correct. For systems with two strings — either two strings into a single MPPT input, or two independent MPPT inputs on a dual-tracker inverter — a 2-string (2S2) unit brings both string cables to one protected, organised connection point.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ctable class=\"eh-table\"\u003e\n\u003ctr\u003e\n  \u003cth\u003eConfiguration\u003c\/th\u003e\n  \u003cth\u003eModel required\u003c\/th\u003e\n  \u003cth\u003eExample\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n  \u003ctd\u003e—\u003c\/td\u003e\n  \u003ctd\u003e1-string: WMPV-1S1 or WPPV-1S1\u003c\/td\u003e\n  \u003ctd\u003eSingle string, 1 MPPT input — most domestic systems up to ~4kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n  \u003ctd\u003e—\u003c\/td\u003e\n  \u003ctd\u003e2-string: WMPV-2S2 or WPPV-2S2\u003c\/td\u003e\n  \u003ctd\u003eTwo strings — dual MPPT inverter, east\/west split array, or larger systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\n\u003ch2\u003eWhere it fits in a solar installation\u003c\/h2\u003e\n\n\u003cdiv class=\"eh-text\"\u003e\n\u003cp\u003eThe combiner box installs between the PV array output and the inverter's DC input terminals. Typically it is mounted on the external wall near where the string cables enter the building, in the roof space, or adjacent to the inverter. All four WCED models are IP65 rated for outdoor installation — they can be mounted externally on the building fabric or in a sheltered outdoor location.\u003c\/p\u003e\n\u003cp\u003eOn the AC side of the inverter, a Type 2 AC SPD at the consumer unit provides protection for the inverter's grid connection. The combiner box DC SPD and the AC consumer unit SPD together provide complete surge protection for the full PV installation. See: \u003ca href=\"https:\/\/ecoharmony.co.uk\/pages\/surge-protection-solar-heat-pumps\" style=\"color:#10b981\"\u003eSurge protection for solar and heat pumps\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\n\u003ch2\u003eFull specifications\u003c\/h2\u003e\n\n\u003ctable class=\"eh-table\"\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eWMPV-1S1 \/ WPPV-1S1\u003c\/th\u003e\n\u003cth\u003eWMPV-2S2 \/ WPPV-2S2\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax DC voltage\u003c\/td\u003e\n\u003ctd\u003e1000V DC\u003c\/td\u003e\n\u003ctd\u003e1000V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eString inputs \/ outputs\u003c\/td\u003e\n\u003ctd\u003e1 in \/ 1 out\u003c\/td\u003e\n\u003ctd\u003e2 in \/ 2 out\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax current per string\u003c\/td\u003e\n\u003ctd\u003e32A\u003c\/td\u003e\n\u003ctd\u003e32A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC isolator rating\u003c\/td\u003e\n\u003ctd\u003e45A\u003c\/td\u003e\n\u003ctd\u003e45A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eString fuse rating\u003c\/td\u003e\n\u003ctd\u003e15A per string\u003c\/td\u003e\n\u003ctd\u003e15A per string\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSPD type\u003c\/td\u003e\n\u003ctd\u003eType 2 DC, 20\/40kA\u003c\/td\u003e\n\u003ctd\u003eType 2 DC, 20\/40kA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSPD voltage rating\u003c\/td\u003e\n\u003ctd\u003e1000V DC\u003c\/td\u003e\n\u003ctd\u003e1000V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure rating\u003c\/td\u003e\n\u003ctd\u003eIP65 IK10\u003c\/td\u003e\n\u003ctd\u003eIP65 IK10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure material\u003c\/td\u003e\n\u003ctd\u003eMetal (WMPV) \/ Polycarbonate (WPPV)\u003c\/td\u003e\n\u003ctd\u003eMetal (WMPV) \/ Polycarbonate (WPPV)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable entry\u003c\/td\u003e\n\u003ctd\u003eCable glands — maintain IP65\u003c\/td\u003e\n\u003ctd\u003eCable glands — maintain IP65\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eWall-mounted, surface fix\u003c\/td\u003e\n\u003ctd\u003eWall-mounted, surface fix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eEN 61439-2 (metal) \/ EN 61439-3 (plastic)\u003c\/td\u003e\n\u003ctd\u003eEN 61439-2 (metal) \/ EN 61439-3 (plastic)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuitable for\u003c\/td\u003e\n\u003ctd\u003eDomestic and light commercial PV\u003c\/td\u003e\n\u003ctd\u003eDomestic and light commercial PV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\n\u003cdiv class=\"eh-cta-box\"\u003e\n\u003cstrong\u003eShop WCED Solar Combiner Boxes\u003c\/strong\u003e\n\u003cp style=\"margin:6px 0 0;color:#374151;font-size:14px;\"\u003eAll four models in stock. Same-day dispatch on orders before 3pm. Also available: standalone DC SPDs (WSPV1000 \/ WSPV600) for custom combiner arrangements.\u003c\/p\u003e\n\u003ca href=\"https:\/\/ecoharmony.co.uk\/collections\/wced-products\"\u003eView full WCED range →\u003c\/a\u003e\n\u003c\/div\u003e\n\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdiv class=\"eh-faq-item\"\u003e\n\u003ch3\u003eDo I need a combiner box or can I connect directly to the inverter?\u003c\/h3\u003e\n\u003cp\u003eFor a single-string system, connecting directly to the inverter is possible — but you lose the DC disconnect point, the string fusing, and the surge protection that a combiner box provides. Most MCS-accredited installers specify a combiner box as standard practice for any PV installation. The DC disconnect is particularly valuable for safe servicing without needing to cover panels or disconnect at module connectors.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"eh-faq-item\"\u003e\n\u003ch3\u003eIs a 1000V DC combiner box suitable for all domestic solar inverters?\u003c\/h3\u003e\n\u003cp\u003eYes — most domestic string inverters operate at DC string voltages between 200V and 600V under normal conditions, well within the 1000V DC rating of these units. The 1000V rating provides a safe margin and future-proofs the installation for higher-voltage string configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"eh-faq-item\"\u003e\n\u003ch3\u003eWhat fuse rating should I use per string?\u003c\/h3\u003e\n\u003cp\u003eThe WCED combiner boxes are supplied with 15A gPV fuses per string as standard, suitable for most domestic PV strings with panels rated up to around 10–11A short circuit current (Isc). If your panels have a higher Isc — check the panel datasheet — the fuse rating should be selected to exceed the panel Isc but not exceed the string cable rating. Always verify against the panel manufacturer's datasheet.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"eh-faq-item\"\u003e\n\u003ch3\u003eCan this combiner box be installed outdoors?\u003c\/h3\u003e\n\u003cp\u003eYes — all four models are IP65 rated and suitable for outdoor installation. Cable glands must be correctly fitted and sized for the cable diameter to maintain the IP65 rating. The polycarbonate WPPV models use UV-stabilised polycarbonate suitable for direct sunlight exposure. The metal WMPV models should have any cut or exposed edges treated to prevent corrosion in coastal or high-humidity environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"eh-faq-item\"\u003e\n\u003ch3\u003eDoes a DC combiner box SPD replace the need for AC surge protection?\u003c\/h3\u003e\n\u003cp\u003eNo — they protect different parts of the system. The DC combiner box SPD protects against surges arriving via the PV string cables from the array. An AC Type 2 SPD at the consumer unit protects the inverter's AC output connection and the rest of the property's circuits. Both are needed for complete surge protection on a solar installation. See: \u003ca href=\"https:\/\/ecoharmony.co.uk\/pages\/surge-protection-solar-heat-pumps\" style=\"color:#10b981\"\u003eSurge protection for solar and heat pumps\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"eh-faq-item\"\u003e\n\u003ch3\u003eWhat is the difference between the metal and plastic combiner box at the same string count?\u003c\/h3\u003e\n\u003cp\u003eBoth the metal (WMPV) and plastic (WPPV) variants at the same string count contain identical internal components — the same DC isolator, fuses, and SPD. The difference is purely the enclosure: steel for the metal versions, UV-stabilised polycarbonate for the plastic. Both are IP65 IK10. Choose metal where higher mechanical robustness or a more commercial aesthetic is required; choose plastic for typical domestic wall-mount applications where weight and non-conductivity are advantages.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"eh-text\"\u003e\n\u003cp\u003e\u003cstrong\u003eFurther reading:\u003c\/strong\u003e\u003cbr\u003e\n\u003ca href=\"https:\/\/ecoharmony.co.uk\/pages\/dc-surge-protection-1000v\" style=\"color:#10b981\"\u003eDC surge protection (1000V) for solar PV explained\u003c\/a\u003e\u003cbr\u003e\n\u003ca href=\"https:\/\/ecoharmony.co.uk\/pages\/surge-protection-solar-heat-pumps\" style=\"color:#10b981\"\u003eSurge protection for solar and heat pumps\u003c\/a\u003e\u003cbr\u003e\n\u003ca href=\"https:\/\/ecoharmony.co.uk\/pages\/ip40-vs-ip65-enclosures-explained\" style=\"color:#10b981\"\u003eIP40 vs IP65 enclosures explained\u003c\/a\u003e\u003cbr\u003e\n\u003ca href=\"https:\/\/ecoharmony.co.uk\/pages\/electrical-safety-knowledge-base\" style=\"color:#10b981\"\u003e← Electrical Safety Knowledge Base\u003c\/a\u003e\n\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c\/section\u003e\n\n\u003cdiv class=\"eh-kb\"\u003e\n\u003cdiv class=\"eh-kb__inner\"\u003e\n\u003ch2\u003eElectrical Safety Knowledge Base\u003c\/h2\u003e\n\u003cp class=\"eh-kb__sub\"\u003eAll guides covering protection devices, surge protection, and enclosures for UK installers.\u003c\/p\u003e\n\u003cdiv class=\"eh-kb__scroll\"\u003e\n\u003ca class=\"eh-kb-card\" href=\"https:\/\/ecoharmony.co.uk\/pages\/dc-surge-protection-1000v\"\u003e\u003cstrong\u003eDC Surge Protection (1000V)\u003c\/strong\u003e\u003cspan\u003eHow DC SPDs differ from AC devices and why solar arrays need them.\u003c\/span\u003e\u003c\/a\u003e\n\u003ca class=\"eh-kb-card\" href=\"https:\/\/ecoharmony.co.uk\/pages\/surge-protection-solar-heat-pumps\"\u003e\u003cstrong\u003eSPD for Solar \u0026amp; Heat Pumps\u003c\/strong\u003e\u003cspan\u003eAC and DC surge protection requirements for solar PV installations.\u003c\/span\u003e\u003c\/a\u003e\n\u003ca class=\"eh-kb-card\" href=\"https:\/\/ecoharmony.co.uk\/pages\/ip40-vs-ip65-enclosures-explained\"\u003e\u003cstrong\u003eIP40 vs IP65 Explained\u003c\/strong\u003e\u003cspan\u003eWhen each IP rating is required — outdoor, garage, and indoor.\u003c\/span\u003e\u003c\/a\u003e\n\u003ca class=\"eh-kb-card\" href=\"https:\/\/ecoharmony.co.uk\/pages\/type-1-vs-type-2-vs-type-1-2-spd\"\u003e\u003cstrong\u003eType 1 vs Type 2 SPD\u003c\/strong\u003e\u003cspan\u003eSPD categories explained — location, ratings, and specification.\u003c\/span\u003e\u003c\/a\u003e\n\u003ca class=\"eh-kb-card\" href=\"https:\/\/ecoharmony.co.uk\/pages\/electrical-safety-knowledge-base\"\u003e\u003cstrong\u003eKnowledge Base Home\u003c\/strong\u003e\u003cspan\u003eAll 20 electrical safety guides.\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"eh-sticky\"\u003e\n\u003cspan class=\"eh-sticky__text\"\u003eWCED Solar Combiner Boxes — 1-string and 2-string in stock\u003c\/span\u003e\n\u003cdiv class=\"eh-sticky__btns\"\u003e\n\u003ca class=\"eh-btn\" href=\"https:\/\/ecoharmony.co.uk\/collections\/wced-products\"\u003eShop combiner boxes\u003c\/a\u003e\n\u003ca class=\"eh-btn eh-btn--outline\" href=\"https:\/\/ecoharmony.co.uk\/pages\/electrical-safety-knowledge-base\"\u003eKnowledge base\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\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\": \"Do I need a combiner box or can I connect directly to the inverter?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"You can connect directly but you lose the DC disconnect, string fusing, and surge protection a combiner box provides. Most MCS installers specify a combiner box as standard practice for any PV installation.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is a 1000V DC combiner box suitable for all domestic solar inverters?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — most domestic string inverters operate at DC string voltages between 200V and 600V, well within the 1000V rating. The 1000V rating provides a safe margin for all standard domestic configurations.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this combiner box be installed outdoors?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — all four models are IP65 rated and suitable for outdoor installation provided cable glands are correctly fitted to maintain the IP65 rating.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Does a DC combiner box SPD replace the need for AC surge protection?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — the DC SPD protects against surges from the PV string cables. An AC Type 2 SPD at the consumer unit is still needed to protect the inverter AC connection and the rest of the installation. Both are required for complete protection.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between the metal and plastic combiner box?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Both contain identical internal components — the same DC isolator, fuses, and SPD. The difference is the enclosure: steel for WMPV, UV-stabilised polycarbonate for WPPV. Both are IP65 IK10 rated.\"}\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"WCED","offers":[{"title":"1 String \/ Metal IP65","offer_id":58008423072131,"sku":"WMPV-1S1","price":72.0,"currency_code":"GBP","in_stock":true},{"title":"1 String \/ Plastic IP65","offer_id":58008423104899,"sku":"WPPV-1S1","price":68.0,"currency_code":"GBP","in_stock":true},{"title":"2 String \/ Metal IP65","offer_id":58008423137667,"sku":"WMPV-2S2","price":110.0,"currency_code":"GBP","in_stock":true},{"title":"2 String \/ Plastic IP65","offer_id":58008423170435,"sku":"WPPV-2S2","price":112.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/7545\/files\/1000V-DC-Dual-String-PV-Protection-with-Integrated-Isolator-Surge-Protection-1-600x600.jpg?v=1778276523","url":"https:\/\/ecoharmony.co.uk\/products\/wced-solar-pv-combiner-boxes-1000v-dc","provider":"EcoHarmony","version":"1.0","type":"link"}