Now there are so many wireless energy monitors on the market, deciding which model to buy might seem a bit confusing.

To help, we've put together this easy to read comparison chart so you can see the specifications and features of each monitor side-by-side.

We offer straight forward and impartial advice on all the brands, and whichever one you decide to buy, you can be sure we'll find you the best price available online.

You can pick up to four models to compare by ticking the ones you want to see in the box below.

Click to Compare Monitors:

Onzo Smart Energy Kit

Owl CM160 USB

SaveOmeter

Current Cost EnviR

Efergy e2 USB

Wattson 01

Eco-eye Elite

Owl CM119

Efergy Elite

Owl Micro CM130

Current Cost TREC

Eco-Eye Mini

Owl CM160 USB

From £39.95

Add to Cart

Current Cost EnviR

From £31.00

Add to Cart

Efergy Elite

From £36.95

Add to Cart

Portable display yes  Mains powered  yes 
Wireless transmitter yes  yes  yes 
Gas meter reading   Future upgrade   
Up to 30m indoor range yes  yes  40m 
Easy to connect yes  yes  yes 
Easy to read display yes  yes  yes 
Mounting options   Free standing   
Three phase compatible (with extra sensors)  (with extra sensor)  (with extra sensors) 
Discreet 3 phase monitoring   (with extra sensors & TX)   
Economy 7 compatible yes  yes  yes 
Individual appliance monitoring   with additional appliance modules   
Individual appliance capacity   9 discreet channels   
Transmitter battery life up to 4 years  7 Years  Up to 12 months 
Transmitter sample rate(s) 6 sec  6 sec  6, 12, 18 seconds 
Manufacturer stated accuracy     <8% 
Batteries included 6 x AA  for transmitter  no, requires 6 x AA 
Eco-friendly packaging      
Low battery warning indicator yes  yes  yes 
High use warning alarm yes    Alarm + LED 
Display currencies £, $, Euro  £, Euro  £, $, Euro 
Voltage settings 110-250v  240  110-400V 
Max Amps input rating (per phase) 70  100  90 
Country of manufacture China  China  China 
Rechargeable battery      
DC adapter input   yes  For display 
DC adapter included   yes   
LCD panel yes  yes  yes 
LED panel      
Quarterly bill tracking      
Instant kWh view yes  yes  yes 
Monthly / Yearly kWh view      
Instant Amps view yes     
Instant pence per hour view yes    yes 
kg CO2 per hour view yes    In History mode 
Tonnes CO2 per year view      
Projected cost per year view      
Projected cost per month view   yes   
Memory function yes  yes  yes 
Micro-generation compatible      
Intelligent Energy Tools      
On-board usage history view yes  yes  yes 
Day/week/month usage view yes  yes  yes 
'Trip meter' style accumulated cost counter yes     
Show total kW usage for current hour      
Sequential display of all modes      
Data storage capacity 2 years daily  2 years 
Date / time display yes  Time  Time 
Temperature / humidity display Temperature  Temp   
Electronic barometer      
Backlit display     yes 
Ambient mood lighting      
USB PC/Mac data link PC  Yes, USB Cable included   
PC/Mac data analysis software PC  Freeware & Google PowerMeter