The cheapest backup power is the load you no longer need to back up.
Before adding solar, batteries, EV charging, heat pumps, or induction cooking, shrink waste where it is obvious. The Department of Energy’s Energy Saver materials repeatedly frame efficiency and weatherization as early steps because they reduce the size and cost pressure of later systems.
First pass: low-drama upgrades
- replace remaining inefficient lighting
- use smart or switched power strips for standby loads
- seal obvious door and window leaks
- clean HVAC filters
- set refrigerator and freezer temperatures appropriately
- remove unused second refrigerators or freezers if practical
- insulate accessible hot water pipes where appropriate
- use window coverings for heat and sun control
- schedule HVAC maintenance
Second pass: measure and prioritize
Use a plug-in electricity usage monitor for plug loads. Track:
- always-on devices
- old refrigerators or freezers
- dehumidifiers
- office equipment
- entertainment systems
- battery chargers
Then decide what deserves replacement, controls, or behavior changes.
Larger upgrades
Plan these carefully:
- air sealing and insulation
- duct sealing
- heat pump
- heat pump water heater
- solar panels
- home battery
- EV charging
- induction range
- panel upgrade or load management
Larger upgrades interact. Do not plan them in isolation.
Decision section
Prioritize upgrades that:
- solve comfort and energy at once
- reduce a large recurring load
- make backup power smaller
- fit the next five years of electrification
- are maintainable by your household
Avoid upgrades that:
- hide a building-shell problem
- require electrical capacity you have not checked
- rely on unsupported savings promises
- create maintenance nobody will do
Use Home Energy Audit to find the first target, then use Whole-Home Energy Map to connect it to the rest of the plan.