Start here
TrimWatt exists to answer one question honestly: what does a home-energy upgrade cost, and what could it realistically save? Here's the shortest path through the site.
1. Run a number first
Every calculator gives an instant, rounded estimate — no email, nothing collected — and shows the formula behind it.
2. Read the guide that fits your situation
Heat Pump vs Furnace: Which Is Cheaper to Run in 2026?
9 min read
Does a Smart Thermostat Work Without a C-Wire?
7 min read
Why Is My Electric Bill So High? 14 Causes Ranked by Cost
8 min read
How Many Solar Panels Do You Need?
8 min read
What Temperature Should You Set Your Thermostat?
6 min read
How Much Does It Cost to Run a Space Heater?
6 min read
Attic Insulation: How Much R-Value You Need and What It Saves
7 min read
How to Find and Seal Air Leaks in Your Home
7 min read
Is There Still a Federal Solar Tax Credit in 2026?
7 min read
Heat Pump Water Heater vs Standard Electric: What You Actually Save
7 min read
What SEER2 Rating Should You Buy?
7 min read
Why Is My AC Running But Not Cooling?
6 min read
Do Smart Thermostats Actually Save Money?
6 min read
Smart Plugs and Phantom Load: What You Can Actually Save
6 min read
3. Go deeper by topic
Smart Home
Thermostats, hubs, lighting, and security that actually save money.
Energy Savings
Understand your bill, seal the leaks, and cut usage room by room.
Heating & Cooling
Heat pumps, HVAC, and water heaters — cost, efficiency, and payback.
Solar
Panels, batteries, and incentives — with honest payback math.
Before you trust any number here
Read our methodology to see where the data comes from, our editorial policy for how we stay independent of advertisers, and who writes this — including what we are not qualified to tell you.