background
banknotes
bill
billing
billing icon
business
cash
commerce
concept
connection
consumption
cost
costs
double socket
economy
efficiency
efficient
electric
electrical
electricity
energy
equipment
euro
expensive
finance
financial
grade
heat
home
house
household
industrial
money
nobody
payment
plug
power
price
rampart
savings
socket
standin
success
supply
symbol
technology
utilities
voltage
wire