iW Solar builds the SS-M split pressurized solar water heater in Taian City, Shandong Province — an indirect pressurized tank (150 L to 500 L) with copper coil exchangers, paired with 1–2 heat pipe collectors and the SR961S work station. The collector goes on the roof, the tank hides indoors — B2B manufacturing and OEM & ODM for importers and distributors since 2013.
A split pressurized solar water heater separates the two parts of the system: the collector sits on the roof, while the pressurized storage tank is placed indoors — in a utility room, garage or basement. A closed loop circulates heat-transfer fluid between collector and tank through copper coil exchangers, so the tank never freezes, never scales and always delivers mains-pressure hot water.
iW Solar manufactures the SS-M series in streamline closed-circuit systems that are recommended for frost-prone and poor-water areas. The circulator is regulated by a control unit on the water heater, which ensures the system only runs when there is heat to collect — so you always have hot water on tap in any weather.
Six standard configurations; the collector count and expansion tank scale with tank size.
| Model | Tank capacity | Collector model | Collector qty | Expansion tank |
|---|---|---|---|---|
| SS-M-15 | 150 L | SC-H-15 | 1 pc | 12 L |
| SS-M-20 | 200 L | SC-H-20 | 1 pc | 12 L |
| SS-M-25 | 250 L | SC-H-25 | 1 pc | 18 L |
| SS-M-30 | 300 L | SC-H-30 | 1 pc | 18 L |
| SS-M-40 | 400 L | SC-H-20 | 2 pcs | 24 L |
| SS-M-50 | 500 L | SC-H-25 | 2 pcs | 24 L |
| Item | Specification |
|---|---|
| Rated pressure | 0.6 MPa |
| Tank type | Indirect, pressurized, with copper coil exchanger(s) — 0 / 1 / 2 coils |
| Work station | SR961S (circulation pump + intelligent control) |
| Collector | SC-HP / SC-H heat pipe collector, Φ58 × 1,800 mm tubes, heat pipe Φ14 × 1,700 mm |
| Vacuum tube material | High borosilicate glass 3.3 |
| Collector insulation | Polyurethane foaming / rock wool, 40 mm |
| Aperture area | 1–3 m² per collector (SC-HP-10 to SC-HP-30) |
| Backup heating | Reliable electric backup with dry-heating protection and thermal cut-out; gas/boiler coil optional |
| Quality control | Full-process inspection; tank pressure test; AQL 2.5 packing check; third-party inspection welcome |
Offer the SS-M split system when your customers live in frost-prone regions, have hard water, or simply want the tank hidden indoors — it is the premium configuration for modern housing. Offer a compact pressurized heater when budget decides and the roof can carry the tank.
The rooftop half of this system is detailed on our heat pipe solar collector page; a flat panel version of the same split concept is also available — see the integrative flat panel solar water heater or ask us for the split flat plate configuration. For a side-by-side view of all main system types, read the different types of solar water heaters.
iW Solar is a B2B manufacturer, not a retail shop, so the system is built around your business:
See the full solar water heater product range for the compact, flat panel and accessory options that complete a catalogue.
Three reasons: the tank can be placed indoors (protected from frost, hidden from view), the closed loop keeps the collector free of scale in hard water areas, and the system keeps working in freezing winters — which is why we recommend it for frost-prone and poor-water markets.
No. The collector circuit carries a heat-transfer fluid through copper coil exchangers; your household water sits in the pressurized indoor tank and is heated through the coil wall. The two never mix.
Yes. The copper coil exchangers can realize the solar cycle and a second cycle for an electric heater or gas energy source, so the household always has hot water in any weather.
It houses the circulation pump and the intelligent control unit that regulates the loop — the system only circulates when the collector is warmer than the tank, which saves power and protects the components.
Yes. Logo printing on the tank, work station and cartons is a standard OEM service, and the complete system kit can be configured to your market specification.
MOQ starts from 1 set for market testing. Production takes 18–25 working days after order confirmation, and we reply to every enquiry within 12 hours.
Tell us your target market, target retail price and estimated annual quantity. Our engineers will come back with the right tank and collector configuration, and a price, within 12 hours.
Request a quotation See all solar water heater productsCompetitive pricing, exceptional quality — get a factory quote within 12 hours.
If you are looking for an experienced and reliable factory for your OEM custom solar water heaters and bespoke solar equipment in China, iWSOLAR is your best choice. We offer the most reasonable price with the finest quality to support your business.
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