{"product_id":"kwh-electricity-sub-meter","title":"Single-Phase Electricity Sub Meter 100A","description":"\u003ch2\u003eSub Meter Your Electricity Usage\u003c\/h2\u003e\n\u003cp\u003eMonitor individual circuits or entire switchboards with the \u003cstrong\u003eReduction Revolution 100A kWh Sub Meter (RRSM01)\u003c\/strong\u003e. It’s accurate, space-efficient, and solar-ready.\u003c\/p\u003e\n\u003cp\u003eKey features include:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHigh Capacity \u0026amp; Accurate. \u003c\/strong\u003eMeasures up to 100 amps with utility meter-grade Class 1 accuracy (±1%).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompact + Easy DIN Rail Mount. \u003c\/strong\u003eFits into a single-pole 18mm-wide DIN rail slot on your switchboard.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTracks 21 Values, Not Just kWh.\u003c\/strong\u003e Use the backlit LCD screen to scroll through energy (kWh), voltage (V), current (A), power and peak demand (W), power factor, frequency (Hz), and more.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSolar, Battery \u0026amp; EV Compatible.\u003c\/strong\u003e It is a bidirectional sub-meter that stores both 'imported' and 'exported' energy readings.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg style=\"float: none;\" alt=\"Sub Meter Switchboard Example\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0150\/2930\/files\/RRSM01-sub-meter-board-example-inline_480x480.jpg?v=1780020945\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cem\u003eThe Reduction Revolution Sub Meter fits inside your existing switchboard.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eTop Uses for Our kWh Meter\u003c\/h3\u003e\n\u003cp\u003eOur sub-meter lets you track usage on any single-phase circuit without a separate electricity account or utility meter. The Reduction Revolution Single-Phase Sub Meter is ideal for:\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003e1. Split Electricity Costs Fairly\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThey are ideal where two or more users share a utility connection and want to split a power bill based on actual usage. For example:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGranny flats, secondary dwellings, backyard studios, garages, or tiny homes.\u003c\/li\u003e\n\u003cli\u003eSmall office sub-tenancies, workshops, or warehouse\/factory units within a larger premises or building.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cstrong\u003e2. Track Electrical Loads or Areas\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eSub-meters help you understand costs or analyse usage in detail. For example:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTrack household loads such as hot water, air conditioning, EV chargers, and pools\/spas.\u003c\/li\u003e\n\u003cli\u003eMonitor commercial loads like irrigation pumps, compressors, cool rooms, lifts, or lighting.\u003c\/li\u003e\n\u003cli\u003eCaravan sites, holiday cabins, boating marina shore power circuits, or hotel\/motel\/Airbnb rooms.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\n\u003cstrong\u003e3. Monitor Solar, Batteries, Backup Power \u0026amp; EVs\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThis bidirectional sub-meter is compatible with power generation systems.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMeasure solar PV output independently of your power bill or solar inverter.\u003c\/li\u003e\n\u003cli\u003eTrack inflows and outflows to your battery backup system.\u003c\/li\u003e\n\u003cli\u003eLog electric vehicle charger usage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCustomers have also used our sub-meters to \u003cstrong\u003eimprove access\u003c\/strong\u003e to electricity usage data. For example, to easily check power use at a sub-board when the main utility meter is far away or locked inside a meter room.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch2\u003eSpecifications - 100A kWh Sub Meter\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 33%;\"\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e240V AC, 50\/60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Current\u003c\/td\u003e\n\u003ctd\u003e100A maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Usage\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.4W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003eClass 1.0 (±1% accuracy)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay Range\u003c\/td\u003e\n\u003ctd\u003e0.01 to 99,999.99 kWh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay Type\u003c\/td\u003e\n\u003ctd\u003eLCD with backlight (press-activated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay Readings\u003c\/td\u003e\n\u003ctd\u003eMeasures 21 values, including: Energy (kWh), Voltage (V), Current (A), Real Power (W), Apparent Power (VA), Reactive Power (VAR), Peak Demand (W \/ VAR), and Power Factor (PF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePulse Output\u003c\/td\u003e\n\u003ctd\u003e1000 impulses per kWh via optical and S0 interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory\u003c\/td\u003e\n\u003ctd\u003eEnergy (kWh) values stored, even without power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBidirectional\u003c\/td\u003e\n\u003ctd\u003eYes. Measures electricity import and export, as Forward  ('+') and Reverse ('-') in kWh, W, and VAR.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompliance Info\u003c\/td\u003e\n\u003ctd\u003eCompliant to all relevant standards, including AS\/NZS 3820 for Electrical Safety, and AS 62052.11 \u0026amp; AS 62053.21 for Electricity Metering Equipment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable Sizes\u003c\/td\u003e\n\u003ctd\u003eActive: up to 25mm² cable (8mm conductor diameter). Neutral: 2.5mm² cable (for voltage and meter power).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e18mm wide × 72mm deep x 90mm length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e100 grams\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eMust be completed by an electrician. Standard DIN rail mount, one 18mm slot wide. Package includes tamper-proof seals for surface-mounted installations.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFurther Details\u003c\/td\u003e\n\u003ctd\u003eReduction Revolution 100A kWh Sub Meter; RRSM01 \u003cbr\u003e\u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0150\/2930\/files\/Single_Phase_100A_kWh_Sub_Meter_RRSM01_Brochure.pdf\" target=\"_blank\"\u003eUser Guide\u003c\/a\u003e (PDF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e2 Years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cimg alt=\"Sub Meter Dimensions\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0150\/2930\/files\/dimensions-800_360x360.jpg\"\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cem\u003eSub Meter Dimensions.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eHow will my electrician wire it up and is it easy to install?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eOur sub-meter is easy to install. We've even printed the wiring diagram on the side of the meter so your electrician can't miss it!\u003c\/p\u003e\n\u003cp\u003eAll you need is one spare DIN rail 'slot' on your switchboard. And if you don't have one free, your electrician can surface-mount it or place it in a separate enclosure.\u003c\/p\u003e\n\u003cp\u003eThe sub meter features large, electrician-friendly wiring terminals to support a rated current of up to 100A. It carries Active (L) through the device; in at ① and out at ③. The Neutral (N) terminal is for voltage sensing and supplying power to the meter. The GND, S01, and S02 terminals are optional pulse signal outputs.\u003c\/p\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0150\/2930\/files\/RRSM01-sub-meter-wiring-diagram-800_480x480.png?v=1779930494\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cem\u003eRRSM01 Electricity Sub Meter Wiring Diagram.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eHow do I take electricity readings, and are they resettable?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eSub-meters count cumulative electricity use in kilowatt-hours (kWh). Much like a car's odometer, the reading starts from zero and increases with use.\u003c\/p\u003e\n\u003cp\u003eTo determine electricity use over a period, note the reading at the start and end (month, quarter, year, etc.). Subtract the start reading from the end reading for total kWh consumed.\u003c\/p\u003e\n\u003cp\u003eThe first screen on the sub meter, labelled \u003cstrong\u003eΣ kWh\u003c\/strong\u003e, shows non-resettable total kWh. There is also a resettable log of kWh (screen 5). See the user guide for details. \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eWhat if access is an issue to take readings?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eIn some cases, you may want to install two sub-meters. For example, one at the house's main switchboard (on the granny flat circuit) and another at the granny flat's sub-board. This way, both parties have easy access to their own meter and readings.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eDoes it store data in a blackout or power outage?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eYes. Energy measurements (kWh) are stored in permanent memory and are retained indefinitely, even without power.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eIs the display backlit?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eYes. It has a blue backlight that activates when you press the button. It's easy to take readings at night or inside a dingy switchboard enclosure.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eIs it solar or battery compatible?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eYes. The meter measures both energy consumed ('Forward Active Energy') and energy exported or produced by solar ('Reverse Active Energy'). It works equally well on circuits without solar.\u003cstrong\u003e\u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eWhat is a 'pulse output'?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThis sub meter has two types of output that emit an impulse for every 1Wh of energy consumption (ie. 1000imp\/kWh). One is 'optical' (a flashing LED light on the front of the meter), and the other is a wired electrical 'S-zero' output. They can be connected to separate energy monitors or building management systems (BMS) for remote monitoring and further analysis.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eAre measurements from this meter enforceable?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThis sub-meter is not certified for customer billing in the same way that your main utility electricity meter is. It does, however, carry the same accuracy class, is relatively inexpensive, and suits most sub-metering applications.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eDo you sell other sub meters?\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eYes, see our complete range of \u003ca href=\"\/collections\/electricity-sub-meters\" title=\"Sub Meters\"\u003eelectricity kWh sub meters\u003c\/a\u003e, including a 3-phase option.\u003c\/p\u003e","brand":"Reduction Revolution","offers":[{"title":"Single Unit","offer_id":52249648791834,"sku":"RRSM01","price":79.5,"currency_code":"AUD","in_stock":true},{"title":"2 Pack","offer_id":52249648824602,"sku":"2xRRSM01","price":149.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0150\/2930\/files\/RRSM01-Electricity-Sub-Meter.jpg?v=1779429537","url":"https:\/\/reductionrevolution.com.au\/products\/kwh-electricity-sub-meter","provider":"Reduction Revolution","version":"1.0","type":"link"}