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Energy monitoring + tenant billing

Know your energy. Bill your tenants.

Wattvision shows your electricity use live and turns submeter readings into accurate tenant bills, using the EKM and Rainforest meters you already own.

Start free trial See how billing works
  • From $79/year
  • 30-day free trial
  • No new hardware for EKM or Rainforest owners

Live from a real EKM meter Example home

1,284 watts

$0.22 per hour /kWh example rate

Example day, midnight to midnight

EKM's demo meter: a house with two occupants and an EV, live.

Works with

EKM Omnimeter EKM Push3 Rainforest Eagle Wattvision Gateway

One dashboard, two jobs

Start where your meters are.

Every meter becomes a site with its own live view, history, alerts and bills. Use it for your own home, a whole building, or both.

For your home

See what your house is using, right now.

  • Live power, updated every few seconds
  • Alerts when usage spikes or a sensor goes quiet
  • Weekly email summaries and full history
  • Solar friendly: net use and generation
Start monitoring

For your properties

Bill every tenant from real readings.

  • One-page PDF bills from submeter readings
  • Your utility's exact rate, flat or time-of-use
  • Tenants open bills from a link, no account
  • Apartments, RV parks, marinas, small commercial
See tenant billing

The new Wattvision

The number that started it all, and everything around it.

Live watts and dollars per hour up top. Day, week and month history underneath. Rebuilt in 2026 for phones, wide screens and dark mode.

Live view

Watts and cost per hour, updated every few seconds.

Week heat map

Spot your busiest hours at a glance.

Alerts

Hear about a spike or a silent sensor first.

Your data

Download it, embed a live widget, or use the API.

wattvision.com/site/live

Example home

Live Day Week Bill

1,284 watts

$0.22 per hour

Today

18.6 kWh

Today

$3.16

This week

Less More

12a6a12p6p11p

12a6a12p6p11p

Example week. Darker is busier.

Wattvision

Electricity bill · example

Unit 4B

Sep 1 – Sep 30, 2026

Start reading
18,204.6
End reading
18,592.3
Used
387.7 kWh
Energy at $0.172/kWh
$66.68
Service charge
$4.00
Total due
$70.68

Tenant billing

Meter readings in. Tenant bills out.

Bill at true cost, backed by the readings printed on every page. A 10-unit building runs about $520 a year.

  1. 1

    Connect

    Enter your EKM Push key and meter IDs.

  2. 2

    Set rates

    Flat or time-of-use, plus fees and credits.

  3. 3

    Send

    A PDF, or a link per tenant.

Explore tenant billing

Since 2009

17 years of watching the watts.

Wattvision started with one question, "How much energy am I using right now?", and a live number to answer it. The number is still here. Everything around it is new.

  1. 2009

    One question

    Founded with Y Combinator (W09) to answer "How much energy am I using right now?"

  2. 2010

    EKM partnership

    Wattvision starts reading EKM Omnimeters, the submeters behind tenant billing today.

  3. 2012

    Wattvision 2

    Kickstarter backers fund the second-generation sensor and gateway.

  4. 2026

    A new Wattvision

    A rebuilt app, PDF tenant bills, dark mode, and the same live number.

Our story

Wattvision at a glance

What it is
A web app for live electricity monitoring and tenant billing.
Works with
EKM Omnimeters on an EKM Push or Push3 gateway, and the Rainforest Eagle smart-meter gateway.
Updates
Every few seconds from a Rainforest Eagle; every minute from EKM meters.
Tenant bills
One-page PDF bills from real meter readings, at your exact utility rate. Tenants open them from a link, no account needed.
Price
$79/year or $9/month for the first site; $49/year or $5/month for each additional site.
Free trial
30 days, on every plan.
Since
2009. Y Combinator W09. EKM Metering partner since 2010.

Questions

Straight answers.

What is Wattvision?

Wattvision is a web app that shows your electricity use live and turns submeter readings into tenant bills. It works with meters people already own: EKM Metering submeters and Rainforest Automation Eagle smart-meter gateways.

What hardware do I need?

Either an EKM Omnimeter connected to an EKM Push or Push3 gateway (one Push serves up to 256 meters), or a Rainforest Eagle that reads your utility smart meter. If you already have one, setup takes a few minutes: enter your meter details and data starts flowing. Older Wattvision Gateways keep working.

How much does Wattvision cost?

The first site is $9/month or $79/year. Each additional site is $5/month or $49/year, so a 10-unit property is about $520/year. Every plan starts with a 30-day free trial.

Can I bill my tenants for electricity with Wattvision?

Yes. Wattvision makes a one-page PDF bill for each unit from real meter readings, with start and end readings and timestamps, your exact utility rate (flat or time-of-use), service charges, credits and solar. Pick any billing period. Tenants open their bill from a link and do not need an account.

How often does the data update?

A Rainforest Eagle uploads every few seconds. EKM meters are read from the EKM Push cloud every minute. Hourly, daily, weekly and monthly history builds up automatically.

Does Wattvision work with solar?

Yes. Wattvision tracks net usage and generation, and tenant bills handle solar and net metering.

Can I get my data out?

Yes. Download your readings any time, embed a live widget on your own site, or use the developer API.

Who makes Wattvision?

Wattvision was founded in 2009 and backed by Y Combinator (W09). It has been an EKM Metering partner since 2010. Support is by email at support@wattvision.com.

Your meters have the data. Put it to work.

Connect a meter in minutes and see your first readings today.

Start free trial See pricing
  • From $79/year
  • 30-day free trial