{"product_id":"oso-s-charge-200-s2s-supercharged-smart-direct-unvented-cylinder-200l-esa-time-of-use-tariff","title":"OSO Saga Charge 200 S2S Supercharged Smart Direct Unvented Cylinder | 200L | ESA Time-of-Use Tariff","description":"\u003cstyle\u003e\n ── Reset ── ,\n.qh-pd, .qh-pd *::before, .qh-pd *::after { box-sizing: border-box; margin: 0; padding: 0; }\n.qh-pd { font-family: inherit; font-size: 16px; line-height: 1.65; color: #1a1a1a; }\n\n ── Brand tokens ── ,\n Primary #008377 | Dark #005f55 | Light bg #e6f4f3 | Amber #f4a921 | Warn-orange #e65100 | Info-blue #1565c0 ,\n\n ── Badges ── ,\n.qh-pd .badge-row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 1.25rem; }\n.qh-pd .badge { display: inline-block; font-size: 11px; font-weight: 700; border-radius: 4px;\n  padding: 3px 10px; letter-spacing: 0.05em; text-transform: uppercase; }\n.qh-pd .b-teal   { background: #008377; color: #fff; }\n.qh-pd .b-dark   { background: #005f55; color: #fff; }\n.qh-pd .b-amber  { background: #f4a921; color: #1a1a1a; }\n.qh-pd .b-grey   { background: #555;    color: #fff; }\n.qh-pd .b-blue   { background: #1565c0; color: #fff; }\n.qh-pd .b-outline { background: transparent; color: #008377; border: 1.5px solid #008377; }\n\n ── Section label ── ,\n.qh-pd .section-label {\n  font-size: 10.5px; font-weight: 800; letter-spacing: 0.14em; text-transform: uppercase;\n  color: #008377; margin-bottom: 0.55rem; margin-top: 1.7rem;\n  padding-bottom: 4px; border-bottom: 2px solid #008377; }\n\n ── Intro text ── ,\n.qh-pd .prod-desc { font-size: 15.5px; color: #2a2a2a; margin-bottom: 1.4rem; line-height: 1.8; }\n\n ── Feature list ── ,\n.qh-pd .feat-list { list-style: none; margin-bottom: 1.4rem; padding: 0; }\n.qh-pd .feat-list li { padding: 4px 0 4px 22px; position: relative; font-size: 15px; }\n.qh-pd .feat-list li::before { content: \"✓\"; position: absolute; left: 0;\n  color: #008377; font-weight: 800; font-size: 15px; }\n\n ── Variant spec table ── ,\n.qh-pd .table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin-bottom: 1.5rem; }\n.qh-pd .spec-table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 520px; }\n.qh-pd .spec-table th, .qh-pd .spec-table td { padding: 7px 11px; border-bottom: 1px solid #d4eeeb; vertical-align: top; word-break: break-word; }\n.qh-pd .spec-table thead th { background: #005f55; color: #fff; font-weight: 700; text-align: left; white-space: nowrap; }\n.qh-pd .spec-table thead th:first-child { min-width: 200px; }\n.qh-pd .spec-table tbody tr:nth-child(even) td { background: #e6f4f3; }\n.qh-pd .spec-table tbody tr:nth-child(odd)  td { background: #fff; }\n.qh-pd .spec-table tbody td:first-child { font-weight: 600; color: #005f55; }\n.qh-pd .sku { font-family: 'Courier New', monospace; font-size: 12px; background: #e6f4f3;\n  color: #005f55; padding: 2px 6px; border-radius: 3px; font-weight: 700; }\n\n ── Callouts ── ,\n.qh-pd .callout { padding: 0.85rem 1.15rem; border-radius: 0 6px 6px 0; margin: 0.9rem 0;\n  font-size: 14.5px; line-height: 1.7; }\n.qh-pd .callout-teal  { background: #e6f4f3; border-left: 4px solid #008377; color: #00443d; }\n.qh-pd .callout-amber { background: #fef8ec; border-left: 4px solid #f4a921; color: #4a3000; }\n.qh-pd .callout-warn  { background: #fff3e0; border-left: 4px solid #e65100; color: #4a1800; }\n.qh-pd .callout-blue  { background: #e8f4fd; border-left: 4px solid #1565c0; color: #0a2a50; }\n\n ── Steps (flexbox — Shopify safe) ── ,\n.qh-pd .steps { list-style: none; padding: 0; margin-bottom: 1.4rem; counter-reset: step; }\n.qh-pd .steps li { counter-increment: step; display: flex; align-items: flex-start; gap: 0.85rem;\n  padding: 0.75rem; border-radius: 6px; margin-bottom: 0.5rem;\n  font-size: 14.5px; line-height: 1.7; background: #fff; border: 1px solid #d4eeeb; }\n.qh-pd .steps li::before { content: counter(step);\n  display: flex; align-items: center; justify-content: center;\n  flex: 0 0 28px; width: 28px; height: 28px; min-width: 28px; border-radius: 50%;\n  background: #008377; color: #fff; font-size: 13px; font-weight: 800; line-height: 1; margin-top: 3px; }\n.qh-pd .steps li strong { color: #005f55; }\n\n ── FAQ ── ,\n.qh-pd .faq-item { border-bottom: 1px solid #d4eeeb; padding: 0.85rem 0; }\n.qh-pd .faq-item:last-child { border-bottom: none; }\n.qh-pd .faq-q { font-size: 14.5px; font-weight: 700; color: #005f55;\n  padding-left: 1.4rem; position: relative; }\n.qh-pd .faq-q::before { content: \"Q\"; position: absolute; left: 0; color: #008377; font-weight: 900; }\n.qh-pd .faq-a { font-size: 14px; color: #2a2a2a; margin-top: 0.4rem; padding-left: 1.4rem; line-height: 1.7; }\n\n ── Box grid (what's included) ── ,\n.qh-pd .box-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));\n  gap: 0.6rem; margin-bottom: 1.4rem; }\n.qh-pd .box-item { background: #e6f4f3; border: 1px solid #b2dcd8; border-radius: 6px;\n  padding: 0.6rem 0.75rem; font-size: 13.5px; color: #00443d;\n  display: flex; align-items: flex-start; gap: 0.4rem; }\n.qh-pd .box-item::before { content: \"✔\"; color: #008377; font-weight: 900; flex-shrink: 0; margin-top: 1px; }\n\n ── Dark strip ── ,\n.qh-pd .dark-strip { background: #005f55; color: #fff; border-radius: 6px;\n  padding: 0.8rem 1.1rem; font-size: 14px; margin-bottom: 1.4rem; line-height: 1.7; }\n.qh-pd .dark-strip strong { color: #7fe8df; }\n\n ── Advantage pills ── ,\n.qh-pd .adv-grid { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.4rem; }\n.qh-pd .adv-pill { background: #005f55; color: #fff; border-radius: 20px;\n  padding: 5px 14px; font-size: 13px; font-weight: 700; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"qh-pd\"\u003e\n\u003cdiv class=\"badge-row\"\u003e\n\u003cspan class=\"badge b-teal\"\u003eSmart Energy Appliance (ESA)\u003c\/span\u003e\u003cspan class=\"badge b-dark\"\u003eS2S Supercharged\u003c\/span\u003e\u003cspan class=\"badge b-amber\"\u003e200L Direct Unvented Cylinder\u003c\/span\u003e\u003cspan class=\"badge b-teal\"\u003eTime-of-Use Tariff Ready\u003c\/span\u003e\u003cspan class=\"badge b-blue\"\u003eOSO InCharge App\u003c\/span\u003e\u003cspan class=\"badge b-grey\"\u003e3 kW Titanium Immersion\u003c\/span\u003e\u003cspan class=\"badge b-outline\"\u003e25-Year Cylinder Warranty\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"prod-desc\"\u003eThe OSO S Charge 200 (internally the S2S 202L) is an Energy Smart Appliance (ESA) — a direct electric unvented hot water cylinder that actively connects to time-of-use electricity tariffs, automatically scheduling its heating to the cheapest available 30-minute pricing windows. It is fully pre-plumbed and wired using OSO's patented S-DESIGN, with all pipework, expansion vessels, and cabling concealed behind a removable lid. Heated by a 3 kW titanium-grade immersion heater (TITANIUM IMMERSION — durable in hard water), the S Charge 200 stores water at 75°C for maximum hot water availability and Legionella compliance. The integrated OSO InCharge system connects to the cloud, reads day-ahead energy prices (e.g. Octopus Agile), and heats during the lowest-cost periods — OSO projects average savings of around £200 per year. Three internal temperature sensors provide precise control. The cylinder is built from stainless steel using ULTRAWELD laser-welded Duplex steel construction, carries a 25-year cylinder warranty, and meets Building Regulations G3 with a factory-fitted G3 kit including integral expansion vessels, PRV, strainer, tundish, and drain cock.\u003c\/p\u003e\n\u003cdiv class=\"section-label\"\u003eKey Features\u003c\/div\u003e\n\u003cul class=\"feat-list\"\u003e\n\u003cli\u003eEnergy Smart Appliance (ESA) — meets UK government smart appliance standards 3 years ahead of mandate\u003c\/li\u003e\n\u003cli\u003eConnects to time-of-use tariffs (e.g. Octopus Agile) — heats during cheapest 30-minute periods automatically\u003c\/li\u003e\n\u003cli\u003eOSO InCharge app: monitor live temperature, available hot water, historical usage, and set holiday mode\u003c\/li\u003e\n\u003cli\u003eMachine learning AI adapts to your daily hot water usage patterns to ensure availability at lowest cost\u003c\/li\u003e\n\u003cli\u003eProjected saving of ~£200\/year by avoiding peak electricity pricing\u003c\/li\u003e\n\u003cli\u003e3 kW TITANIUM IMMERSION heater — superior durability in hard water conditions\u003c\/li\u003e\n\u003cli\u003e75°C thermostat setpoint — maximises effective hot water capacity through temperature stratification\u003c\/li\u003e\n\u003cli\u003eEffective hot water capacity at 40°C: 343L — 200L cylinder delivers significantly more usable hot water than nominal volume\u003c\/li\u003e\n\u003cli\u003eS-DESIGN — all pipework, expansion vessels, cables concealed under lid for a clean, tidy installation\u003c\/li\u003e\n\u003cli\u003eNANOPUR high-grade insulation — excellent standing heat loss performance\u003c\/li\u003e\n\u003cli\u003eULTRAWELD — laser-welded Duplex stainless steel cylinder with 25-year warranty\u003c\/li\u003e\n\u003cli\u003eFully pre-plumbed and wired — up to 70% labour saving vs traditional cylinders\u003c\/li\u003e\n\u003cli\u003eIntegral G3 Building Regulations kit: 2 × 8L expansion vessels (factory-fitted), PRV, strainer, expansion relief, drain cock, tundish\u003c\/li\u003e\n\u003cli\u003eMixing valve preset to 60°C at draw-off point for user safety\u003c\/li\u003e\n\u003cli\u003eXL tapping profile — suitable for family homes with high hot water demand\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"section-label\"\u003eOSO Technology Advantages\u003c\/div\u003e\n\u003cdiv class=\"adv-grid\"\u003e\n\u003cspan class=\"adv-pill\"\u003eS-DESIGN — All Connections Hidden\u003c\/span\u003e\u003cspan class=\"adv-pill\"\u003eNANOPUR — High-Grade Insulation\u003c\/span\u003e\u003cspan class=\"adv-pill\"\u003eULTRAWELD — Superior Corrosion Resistance\u003c\/span\u003e\u003cspan class=\"adv-pill\"\u003eTITANIUM IMMERSION — Hard Water Durability\u003c\/span\u003e\u003cspan class=\"adv-pill\"\u003eTARIFF-READY — Smart ESA\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"section-label\"\u003eWhat's Included\u003c\/div\u003e\n\u003cdiv class=\"box-grid\"\u003e\n\u003cdiv class=\"box-item\"\u003eS Charge 200 (S2S 202L) direct cylinder\u003c\/div\u003e\n\u003cdiv class=\"box-item\"\u003e3 kW TITANIUM IMMERSION heater (factory-fitted)\u003c\/div\u003e\n\u003cdiv class=\"box-item\"\u003eMixing valve — preset 60°C\u003c\/div\u003e\n\u003cdiv class=\"box-item\"\u003eP\u0026amp;T safety valve (10 bar \/ 90–95°C)\u003c\/div\u003e\n\u003cdiv class=\"box-item\"\u003e2 × 8L integral expansion vessels (factory-fitted)\u003c\/div\u003e\n\u003cdiv class=\"box-item\"\u003eInlet control valve (strainer + PRV + expansion relief)\u003c\/div\u003e\n\u003cdiv class=\"box-item\"\u003eDrain cock\u003c\/div\u003e\n\u003cdiv class=\"box-item\"\u003eTundish\u003c\/div\u003e\n\u003cdiv class=\"box-item\"\u003eFitting template\u003c\/div\u003e\n\u003cdiv class=\"box-item\"\u003eInstallation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"callout callout-blue\"\u003eℹ️ \u003cstrong\u003eSmart Tariff Connectivity:\u003c\/strong\u003e The S Charge 200 is an Energy Smart Appliance certified to work with flexible time-of-use tariffs. It knows energy prices 24 hours in advance and uses AI to learn your household's hot water demand, heating at the lowest-cost periods while always ensuring adequate hot water availability.\u003c\/div\u003e\n\u003cdiv class=\"section-label\"\u003eTechnical Specifications\u003c\/div\u003e\n\u003cdiv class=\"table-scroll\"\u003e\u003ctable class=\"spec-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eUnit\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Number\u003c\/td\u003e\n\u003ctd\u003eOSO\u003c\/td\u003e\n\u003ctd\u003e11014147\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Model Name\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eS2S 202\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Volume\u003c\/td\u003e\n\u003ctd\u003eL\u003c\/td\u003e\n\u003ctd\u003e202\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEffective Capacity at 40°C\u003c\/td\u003e\n\u003ctd\u003eL\u003c\/td\u003e\n\u003ctd\u003e343\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (H × Ø)\u003c\/td\u003e\n\u003ctd\u003emm\u003c\/td\u003e\n\u003ctd\u003e1375 × 595\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (empty)\u003c\/td\u003e\n\u003ctd\u003ekg\u003c\/td\u003e\n\u003ctd\u003e47\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (full)\u003c\/td\u003e\n\u003ctd\u003ekg\u003c\/td\u003e\n\u003ctd\u003e246\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermostat Setpoint\u003c\/td\u003e\n\u003ctd\u003e°C\u003c\/td\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Loss (EN 12897)\u003c\/td\u003e\n\u003ctd\u003eW\u003c\/td\u003e\n\u003ctd\u003e58\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Loss \/ 24 hrs\u003c\/td\u003e\n\u003ctd\u003ekWh\/day\u003c\/td\u003e\n\u003ctd\u003e1.39\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnnual Energy Consumption\u003c\/td\u003e\n\u003ctd\u003ekWh\/year\u003c\/td\u003e\n\u003ctd\u003e4482\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnergy Efficiency\u003c\/td\u003e\n\u003ctd\u003e%\u003c\/td\u003e\n\u003ctd\u003e37.4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnergy Rating\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTapping Profile\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImmersion Power\u003c\/td\u003e\n\u003ctd\u003ekW\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical Supply\u003c\/td\u003e\n\u003ctd\u003eV\u003c\/td\u003e\n\u003ctd\u003e240 V single-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Operating Pressure\u003c\/td\u003e\n\u003ctd\u003ebar\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExpansion Vessels\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e2 × 8L factory-fitted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMixing Valve Preset\u003c\/td\u003e\n\u003ctd\u003e°C\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eP\u0026amp;T Valve Rating\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e10 bar \/ 90–95°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCylinder Material\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eStainless steel — ULTRAWELD Duplex laser-welded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImmersion Type\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eTITANIUM IMMERSION\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCylinder Warranty\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e25 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"section-label\"\u003eInstallation Overview\u003c\/div\u003e\n\u003cdiv class=\"callout callout-warn\"\u003e⚠️ \u003cstrong\u003eQualified installer required:\u003c\/strong\u003e This is an unvented hot water cylinder. Installation must be carried out by a qualified installer holding a current G3 Unvented Hot Water Systems certificate (or equivalent). All electrical connections must comply with BS 7671.\u003c\/div\u003e\n\u003col class=\"steps\"\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003ePre-installation check:\u003c\/strong\u003e Confirm the cylinder will fit in the installation location — dimensions are 1375mm (H) × 595mm (Ø). Ensure the floor can support the full loaded weight. Allow 400mm clearance above the unit and 150mm at the rear for pipe connections.\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eUse the fitting template:\u003c\/strong\u003e Fix the supplied fitting template to the rear wall. This locates the pre-cut pipe tails in the exact positions required for the S-DESIGN rear connection system. Drill and fix accordingly.\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eConnect incoming cold mains:\u003c\/strong\u003e Connect the mains cold water supply to the integrated inlet control valve (strainer, PRV, expansion relief already factory-fitted). Ensure supply pressure is within system limits — install a PRV upstream if mains pressure exceeds 6 bar.\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eConnect hot water outlets:\u003c\/strong\u003e Connect the hot water outlet to your distribution pipework. The factory-fitted mixing valve is preset to 60°C — do not alter without re-calculating downstream scalding risks.\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eConnect tundish discharge:\u003c\/strong\u003e Connect the tundish outlet to a safe and visible discharge point in accordance with BS 6700 \/ Building Regulations Part G. Use an indirect discharge pipe with the correct air gap.\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eElectrical connections:\u003c\/strong\u003e Connect the immersion heater to a dedicated 240V 13A fused connection unit (FCU). The smart ESA connectivity requires a broadband internet connection — follow the OSO InCharge app setup guide to pair the cylinder with your Wi-Fi network and energy tariff.\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eFill, commission and test:\u003c\/strong\u003e Fill the cylinder slowly and check all connections for leaks. Open hot water outlets to bleed air. Switch on and allow the cylinder to heat to operating temperature. Confirm the mixing valve is correctly set. Complete the G3 commissioning record and hand it to the customer.\u003c\/div\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"callout callout-amber\"\u003e💡 \u003cstrong\u003eSmart energy tip:\u003c\/strong\u003e The S Charge 200 works best with a dynamic time-of-use tariff such as Octopus Agile or Octopus Flux. Once paired via the OSO InCharge app, it will automatically shift its heating to off-peak periods. A £200\/year saving is projected based on typical usage patterns.\u003c\/div\u003e\n\u003cdiv class=\"section-label\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eWhat makes the S Charge different from a standard electric cylinder?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eThe S Charge is an Energy Smart Appliance (ESA). Unlike a standard cylinder that heats on a fixed timer, the S Charge connects to the internet, reads 30-minute ahead energy prices from your tariff provider, and automatically heats during the cheapest periods. It uses AI\/machine learning to learn your household's hot water patterns and always ensures hot water is available when you need it — at the lowest possible cost.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eWhich electricity tariffs does the S Charge work with?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eThe S Charge is designed for dynamic time-of-use tariffs where the unit price of electricity changes every 30 minutes in response to grid demand and renewable generation. Octopus Agile is the most common example in the UK. The unit retrieves 24-hour ahead pricing data via its internet connection and schedules heating accordingly.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eHow much can I save with the S Charge?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eOSO projects an average saving of around £200 per year for a typical household, achieved by consistently heating during the cheapest tariff windows and avoiding peak periods. Actual savings depend on your tariff, hot water usage, and local energy prices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eCan I still control the cylinder manually if needed?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eYes. The OSO InCharge app gives you full manual control — you can override the smart schedule, boost the temperature immediately, set holiday mode (to prevent unnecessary heating while away), and view live temperature readings and historical usage data.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eHow much usable hot water does the S Charge 200 actually provide?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eBecause the cylinder stores water at 75°C, blended down to 60°C at the mixing valve, the effective usable hot water volume (at 40°C comfort temperature) is 343 litres — significantly more than the nominal 202L. This means you can often install a smaller cylinder than with a competitor product.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eWhat is the cylinder made from and what warranty applies?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eThe S Charge cylinder is made from stainless steel using OSO's ULTRAWELD Duplex laser-welded construction for superior corrosion resistance. The cylinder carries a 25-year warranty against material and manufacturing defects. The immersion heater and electrical components carry a 2-year warranty.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eDoes the S Charge work if my broadband goes down?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eYes. If the internet connection is lost, the cylinder falls back to its last-known heating schedule or a default schedule. You won't lose hot water — you just lose smart tariff optimisation until connectivity is restored. The app will notify you of connectivity issues.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eIs the S Charge suitable for hard water areas?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eYes. The TITANIUM IMMERSION heater is specifically designed for use in hard water areas, offering significantly better durability than standard stainless steel or incoloy elements. The stainless steel cylinder construction also provides inherent scale resistance.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eDoes the S Charge come with everything needed for Building Regulations compliance?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eYes. The G3 kit is factory-fitted, including two 8L integral expansion vessels (one on 150L models), PRV, strainer, expansion relief, drain cock, and tundish. Your G3-qualified installer will complete the commissioning checklist and issue the relevant documentation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cdiv class=\"faq-q\"\u003eCan the S Charge work with solar PV?\u003c\/div\u003e\n\u003cdiv class=\"faq-a\"\u003eYes. The OSO InCharge app supports solar panel integration, allowing the cylinder to prioritise heating when your solar PV is generating excess electricity. This maximises self-consumption and can further reduce running costs beyond the tariff optimisation savings.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"OSO Hotwater","offers":[{"title":"Default Title","offer_id":63639943840093,"sku":"11014147","price":1350.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/OsoHotWaterCylinderinLivingroom.jpg?v=1772165762","url":"https:\/\/qualityheating.co.uk\/products\/oso-s-charge-200-s2s-supercharged-smart-direct-unvented-cylinder-200l-esa-time-of-use-tariff","provider":"AIZO Quality Heating","version":"1.0","type":"link"}