Best Single phase Watt Hour Meter

Extech PQ2071 True RMS 1/3 Phase 1000A AC Power Clamp Meter

Meter operates as a True RMS Clamp Meter, Power Meter, Multimeter, and AC Voltage Detector.
Measures AC Current, Voltage, Frequency and Power including True Power, Apparent Power, Reactive Power and Active Power.
Measures 1-Phase/ balanced 3-Phase True Power (kW), Apparent Power (kVA), Reactive Power (kVAR) and Active Power (kWh),plus Power Factor/ Phase Angle.
Large dual backlit LCD display (9999 count) with bargraph.

High Precision:Motor speed controller 36V has small size, high precision, wide speed controlling range, low power consumption and long service life.
Size: 11.2 × 10 × 6cm/4.4 × 3.9 × 2.3inch.
Single Phase Controller:This DC motor speed controller 24V is only suitable for the motor below 1800rpm. A single-phase asynchronous motor speed controller and can be used for 24V, 36V, 90V DC motors. Input Voltage: AC 110V.
Wide Application:Adjustable DC motor speed controller 90V can be widely used for speed governing device drivers of packaging, printing, electronics, instrument meter, clothing machinery, medical machinery and other industries.
High Quality Circuit Board:This motor speed controller 24V uses high quality electronic circuit and integrated components, sturdy, not easy to aging and abrasion resistant, to ensure maximum strength and durability for long lasting usage.
Fast To Respond:DC motor speed controller is used with single-phase asynchronous motor to realize feedback constant speed and stepless speed regulation. It feels smooth and has good durability.

7-IN-1 MULTIMETER --- measure and display voltage (0-90V), current (0-100A), power, battery capacity, amp-hour, watt-hour and time simultaneously..
APPLICATION --- can be used as battery charge-discharge tester meter for automobile and car battery.
as battery capacity monitor for photovoltaic system.
as voltage meter, current meter, power meter, etc..
BIDIRECTIONAL AMMETER --- the multimeter can detect current in dual direction without changing the wiring direction when used for monitoring charging and discharging..
PROTECTION --- over-voltage protection, over-current protection, over-power protection, over-charged protection, time limitation, etc..
automatically/manually switch off LCD screen.
with output control button to enable/disable output (requires a relay)..

...cator to remind you. Tuning tachometer helps monitor your engine or car in good condition.
Selectable stroke mode - Multiple choice for automotive ignition mode. The tiny tach meter is widely applied in industrial implements, agriculture, construction machinery and powersports, work with universal engine: 2 stroke ( single/twin/3/6 ) cylinders and 4 stroke ( single/twin/3/4/5/6/8/12 ) cylinders. Universally compatible with gy6 & eu2000 & eu2200 & eu3000, etc.
Digital tachometer gauge - Easily operated: Simple contact tach/hour meter sensor, just circle the wire five rounds on the spark plug wire then use the tie to fix it. Replaceable battery: the electronic induction tach meter has data memory function. The previous data can be recovered after replacing new battery. Auto sleep mode and selectable backlight time help save the energy. The waterproof grading of the rpm gauge: ip67.

Up to 5000 Watt Maximum Capacity, Heavy Duty Step Up/Down Voltage Converter Transformer (110/120V 220/240V).
NOTE: This converter is designed only for European/Asian 220V (Single Phase) , it will not Work with American 220 (Dual Phase, Not designed for US....
Dual Circuit Breakers Protection for Each Voltage (120V & 220V) 2 x 110V Socket, 1 x Universal 220V Socket, Weight: 21 lbs., Dimensions: 10.25" x 8" x....
MAX - 5000 Watt for 30 Mins Use. For continuous use: 2500W. Make sure you multiply x2 the wattage of your item and get a transformer bigger than that.
WARNING: We do not recommend for high wattage heat producing items such as Coffee Maker, Expresso Machine, Toaster & Welding Equipment ETC.

Manufacturers Part Number: 37-200 & 37-205.
Works Connection 37-200 Tach/Hour Meter/Clock with Maintenance Timer & 37-205 Tach/Hour Meter Combo Kit.
Clock features 12 or 24 hour operation. Works on Fuel injected/carbureted 2-Strokes/4-Strokes from 1 to 8 cylinders . Large, easy to read LCD screen in a sleek, compact design Measures up to 19999 RPM and tracks total hours up to 99999. Easy installation ( single wire lead wraps around spark plug wire ).
Can be mounted on any 6mm bolt ( In front of gas tank, on triple clamp, in airbox etc. ) In front of gas tank is the most common, although on some bikes that location is not possible..

12000 watt peak power, 9000 watt rated power(GAS).
9500 watt peak power, 7250 watt rated power(LPG).
2x 120V AC 20A outlets, 1x 120V twist-lock AC 30A outlet, 1x 120/240V twist-lock AC 30A outlet, 1x AC 120V/240V AC 50A Outlet.
Includes hour meter, maintenance free Battery and flat free wheel kit.
EPA Certified. Non C. A. R. B. Compliant, not available to ship to California.

WVC series inverter Using IP65 waterproof streamline design which effectively prevent rainwater on the surface erosion. Microinverters turn the power from your solar panels into usable electricity. Single-phase microinverters are usually used in residential and small commercial environments（Support single-phase or three-phase connection）.
We have improved the AC wiring solution. Configure converters for faster installation. Avoid the risk of miswiring the fire, zero and ground wires.Meanwhile, the DC input is designed with MC4 connector to avoid reversing the positive and negative terminals. (Some customers extend the solar panel cable so that the positive and negative polarity is reversed).
Grid Tie Inverter can monitor in real time the power generated by the inverter through the AC digital meter.（Voltage, current, active power, electrical energy, frequency, power factor）No fire risk and electric shock during installation and operation due to low DC voltage(up to 50V) compared with at least 200V from string inverters.
Grid Tie Solar Inverter suitable for 4X250W-300W 36V solar panel (Vmp30-39V.
Voc = open circuit voltage.Optimized for high powered 60-cell and 72-cell* modules.Each MC4 branch cannot exceed 300W.