AltSource 120 3 Phase 6.8 kW - 60 kw
AltSource 120 3 Phase 6.8 kW - 60 kw - 208V / 6.8 kW / No Coil is backordered and will ship as soon as it is back in stock.
AltSource 120 3-Phase Commercial Electric Boiler & Storage Tank
Available with or without an optional copper coil heat exchanger.
The Thermo 2000 AltSource 120 combines an electric hydronic boiler with a 120-US-gallon storage tank. It stores heat from a primary renewable energy source and supplies auxiliary electric heat when needed. An optional immersed copper coil heat exchanger heats or preheats domestic water.
SCR power modulation adjusts output from 0 to 100% according to demand. Three-phase models are offered in 208V, 240V, 480V and 600V configurations; output depends on the selected model and supply voltage.
Key Features & Benefits
- Thermal storage: High water volume stores energy for later heating demand.
- Modulating electric backup: SCR control manages heat output and limits maximum electrical demand.
- Electronic control: A Schneider Electric controller provides temperature and power settings, outdoor reset and operating information.
- Building-system integration: BACnet IP/MS/TP communication and external 0–10V control support coordinated operation.
- Optional domestic hot water: The copper coil configuration transfers heat to potable water.
- Service access: Separate cabinet compartments provide access to heating elements and control components.
AltSource 120 Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Thermo 2000 |
| Product type | Commercial electric hydronic boiler and storage tank |
| Tank volume | 120 US gallons |
| Electrical supply | 3-phase, 60 Hz; 208V, 240V, 480V or 600V, model-dependent |
| 208V output | 6.8–54.1 kW, according to the model tables |
| 240V / 480V / 600V output | 9–60 kW, model-dependent |
| Power modulation | 0–100% using a solid-state SCR relay |
| Controller | Schneider Electric electronic controller |
| Temperature set point | 50–200°F (10–93°C) |
| Product dimensions | 36 in W × 36.5 in D × 78 in H |
| Weight without optional coil | 530 lb — manufacturer-listed unit weight |
| Weight with optional coil | 630 lb — manufacturer-listed unit weight |
| Tank construction | Steel pressure vessel |
| Insulation | Polyurethane foam |
| Tank / optional coil warranty | 10-year limited warranty; tank coverage for closed-circuit heating applications |
| Parts and accessories warranty | 2 years |
Unit weights are not palletized shipping weights. Dimensions and weights are listed in the manufacturer flyer; warranty terms and control details follow the August 2026 specifications. See Technical Documents Below.
Configurations & Available Options
| Specification | Details |
|---|---|
| Without copper coil | Hydronic heating and thermal storage; does not include the domestic-water coil. |
| With copper coil | Adds an immersed heat exchanger for heating or preheating domestic water. |
Options are configuration-dependent and are not all included as standard equipment. Confirm the selected configuration before ordering.
Component Reference
Reference numbers correspond to the manufacturer’s illustrated component diagram in the brochure found below in Technical Documents.
3-Phase Model Specifications
Model identifiers and rated outputs are shown separately. The 208V models use 240V-rated elements operated at 208V.
All models are AltSource 120. Model labels below show the nominal kW identifier; the heading supplies voltage and phase. Rated output is listed separately. Electrical details display as labeled rows on phones.
208V — 3 Phase
| Model | BTU/h | kW | Amps |
|---|---|---|---|
| 7KW | 23065 | 6.8 | 19 |
| 10KW | 34598 | 10.1 | 28 |
| 11KW | 38442 | 11.3 | 31 |
| 14KW | 46130 | 13.5 | 37 |
| 20KW | 69195 | 20.3 | 56 |
| 23KW | 76884 | 22.5 | 62 |
| 27KW | 92260 | 27.0 | 75 |
| 30KW | 103793 | 30.4 | 84 |
| 34KW | 115326 | 33.8 | 94 |
| 41KW | 138391 | 40.6 | 113 |
| 45KW | 153767 | 45.1 | 125 |
| 54KW | 184521 | 54.1 | 150 |
| Model | Stages | Elements (240V) | Relay stages | SCR stage |
|---|---|---|---|---|
| 7KW | 1 | 3 x 3 kW | N.A. | 1 x 6.8 kW |
| 10KW | 1 | 3 x 4.5 kW | N.A. | 1 x 10.1 kW |
| 11KW | 1 | 3 x 5 kW | N.A. | 1 x 11.3 kW |
| 14KW | 1 | 3 x 6 kW | N.A. | 1 x 13.5 kW |
| 20KW | 2 | 6 x 4.5 kW | 1 x 10.1 kW | 1 x 10.1 kW |
| 23KW | 2 | 6 x 5 kW | 1 x 11.3 kW | 1 x 11.3 kW |
| 27KW | 2 | 6 x 6 kW | 1 x 13.5 kW | 1 x 13.5 kW |
| 30KW | 3 | 9 x 4.5 kW | 2 x 10.1 kW | 1 x 10.1 kW |
| 34KW | 3 | 9 x 5 kW | 2 x 11.3 kW | 1 x 11.3 kW |
| 41KW | 3 | 9 x 6 kW | 2 x 13.5 kW | 1 x 13.5 kW |
| 45KW | 4 | 12 x 5 kW | 3 x 11.3 kW | 1 x 11.3 kW |
| 54KW | 4 | 12 x 6 kW | 3 x 13.5 kW | 1 x 13.5 kW |
208V 3-phase supply: L1–L2–L3, three 75°C conductors and a ground, as specified by the manufacturer. Refer to the installation manual for wiring and protection requirements.
240V — 3 Phase
| Model | BTU/h | kW | Amps |
|---|---|---|---|
| 9KW | 30708 | 9 | 22 |
| 13KW | 46062 | 13.5 | 32 |
| 15KW | 51180 | 15 | 36 |
| 18KW | 61416 | 18 | 43 |
| 27KW | 92124 | 27 | 65 |
| 30KW | 102360 | 30 | 72 |
| 36KW | 122832 | 36 | 87 |
| 41KW | 138186 | 40.5 | 97 |
| 45KW | 153540 | 45 | 108 |
| 54KW | 184248 | 54 | 130 |
| 60KW | 204720 | 60 | 144 |
| Model | Stages | Elements (240V) | Relay stages | SCR stage |
|---|---|---|---|---|
| 9KW | 1 | 3 x 3 kW | N.A. | 1 x 9 kW |
| 13KW | 1 | 3 x 4.5 kW | N.A. | 1 x 13.5 kW |
| 15KW | 1 | 3 x 5 kW | N.A. | 1 x 15 kW |
| 18KW | 1 | 3 x 6 kW | N.A. | 1 x 18 kW |
| 27KW | 2 | 6 x 4.5 kW | 1 x 13.5 kW | 1 x 13.5 kW |
| 30KW | 2 | 6 x 5 kW | 1 x 15 kW | 1 x 15 kW |
| 36KW | 2 | 6 x 6 kW | 1 x 18 kW | 1 x 18 kW |
| 41KW | 3 | 9 x 4.5 kW | 2 x 13.5 kW | 1 x 13.5 kW |
| 45KW | 3 | 9 x 5 kW | 2 x 15 kW | 1 x 15 kW |
| 54KW | 3 | 9 x 6 kW | 2 x 18 kW | 1 x 18 kW |
| 60KW | 4 | 12 x 5 kW | 3 x 15 kW | 1 x 15 kW |
240V 3-phase supply: L1–L2–L3, three 75°C conductors and a ground, as specified by the manufacturer. Refer to the installation manual for wiring and protection requirements in the Technical Documents found below.
480V — 3 Phase
| Model | BTU/h | kW | Amps |
|---|---|---|---|
| 9KW | 30708 | 9 | 10.8 |
| 15KW | 51180 | 15 | 18.0 |
| 18KW | 61416 | 18 | 21.7 |
| 30KW | 102360 | 30 | 36.1 |
| 36KW | 122832 | 36 | 43.3 |
| 45KW | 153540 | 45 | 54.1 |
| 54KW | 184248 | 54 | 65 |
| 60KW | 204720 | 60 | 72.2 |
| Model | Stages | Elements (277V) | Relay stages | SCR stage |
|---|---|---|---|---|
| 9KW | 1 | 3 x 3 kW | N.A. | 1 x 9 kW |
| 15KW | 1 | 3 x 5 kW | N.A. | 1 x 15 kW |
| 18KW | 1 | 3 x 6 kW | N.A. | 1 x 18 kW |
| 30KW | 2 | 6 x 5 kW | 1 x 15 kW | 1 x 15 kW |
| 36KW | 2 | 6 x 6 kW | 1 x 18 kW | 1 x 18 kW |
| 45KW | 3 | 9 x 5 kW | 2 x 15 kW | 1 x 15 kW |
| 54KW | 3 | 9 x 6 kW | 2 x 18 kW | 1 x 18 kW |
| 60KW | 4 | 12 x 5 kW | 3 x 15 kW | 1 x 15 kW |
480V 3-phase supply: L1–L2–L3, three 75°C conductors and a ground, as specified by the manufacturer. Refer to the installation manual for wiring and protection requirements found in the Technical Documents below.
600V — 3 Phase
| Model | BTU/h | kW | Amps |
|---|---|---|---|
| 9KW | 30708 | 9 | 8.7 |
| 15KW | 51180 | 15 | 14.4 |
| 18KW | 61416 | 18 | 17.3 |
| 30KW | 102360 | 30 | 28.9 |
| 36KW | 122832 | 36 | 34.6 |
| 45KW | 153540 | 45 | 43.3 |
| 54KW | 184248 | 54 | 52 |
| 60KW | 204720 | 60 | 57.7 |
| Model | Stages | Elements (347V) | Relay stages | SCR stage |
|---|---|---|---|---|
| 9KW | 1 | 3 x 3 kW | N.A. | 1 x 9 kW |
| 15KW | 1 | 3 x 5 kW | N.A. | 1 x 15 kW |
| 18KW | 1 | 3 x 6 kW | N.A. | 1 x 18 kW |
| 30KW | 2 | 6 x 5 kW | 1 x 15 kW | 1 x 15 kW |
| 36KW | 2 | 6 x 6 kW | 1 x 18 kW | 1 x 18 kW |
| 45KW | 3 | 9 x 5 kW | 2 x 15 kW | 1 x 15 kW |
| 54KW | 3 | 9 x 6 kW | 2 x 18 kW | 1 x 18 kW |
| 60KW | 4 | 12 x 5 kW | 3 x 15 kW | 1 x 15 kW |
600V 3-phase supply: L1–L2–L3, three 75°C conductors and a ground, as specified by the manufacturer. Refer to the installation manual for wiring and protection requirements found in the Technical Documents below.
Limited Warranty
| Coverage | Terms |
|---|---|
| Tank and optional heat exchanger | 10 years from purchase for leaks caused by defective materials or workmanship, for the original commercial purchaser. |
| Other components | 2 years against defects in materials or workmanship. |
| Excluded costs | Removal, reinstallation, shipping and handling are the purchaser’s responsibility. |
| Conditions and claims | Installation, maintenance and water-quality conditions apply. Submit claims through an authorized retailer with the required purchase and product records. |
Technical Documents
AltSource 120 3 Phase 6.8 kW - 60 kw
AltSource 120 3 Phase 6.8 kW - 60 kw - 208V / 6.8 kW / No Coil is backordered and will ship as soon as it is back in stock.
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Let customers speak for us
The boiler works great easy install. But the tech support we got hold of was in French so not a lot of help.manual was easy to follow on wiring
Easy purchase - exactly what I needed
Plumber was very happy with it. So are we.
I’ve been using Everflux for some years now and it’s simply the best there is.
Excellent product for descaling tankless water heater.
Once again, great quick service
Good go,, 👍👍👍
Great service. Happy to find the products I needed.
Great place to order from. No complaints.
Had everything i needed and step by step directions!
Excellent product! Customer service via email was timely & supportive... Shipping was quicker than expected... Thx!
Great service, quick, my new go to store/website
Works really well, this seals well also.
Dont use too much and dont put that much heat on it.
Haven't tested when water is in the system but over all is better than oatey no 5.
I am very happy with my experience. We had a shipping issue on my first order, and after working with PLUMBESTORE, they sent me another part ASAP. The part arrived very quickly and as described.
Very good product
