A net-zero home produces as much energy as it consumes annually — solar is usually the final piece, not the whole strategy.
Efficiency first, generation second
The most cost-effective path to net-zero starts with reducing consumption — insulation, air sealing, efficient HVAC (see our heating/cooling guide) — before sizing solar to cover what's left. Chasing net-zero through solar alone on an inefficient home requires a much larger, more expensive system than necessary.
Electrification often precedes true net-zero
A home still burning gas for heating or water heating can't reach true net-zero through solar electric alone, since solar only offsets electricity — see our electrification priorities guide for the typical sequence toward an all-electric home solar can fully offset.
Sizing solar for the final, reduced-usage target
Once efficiency and electrification are accounted for, size solar using your projected — not current — usage with the solar panel calculator, since your actual usage profile will likely shift meaningfully through the process.
"Net-zero" and "off-grid" are different goals
Net-zero is an annual accounting concept under net metering — you're still grid-connected, drawing at night and exporting during the day, netting to zero over a year. This is a different (and much more achievable) goal than true off-grid independence, covered in our grid-tied vs off-grid guide.
New construction has a real advantage
Building net-zero into new construction from the start — orientation, insulation levels, electrification — is generally more cost-effective than retrofitting an existing home to the same standard, though retrofits absolutely can and do reach net-zero with the right sequence of upgrades.
Frequently asked questions
Is net-zero the same as generating 100% of my own electricity in real time?
No — net-zero is typically an annual accounting concept under net metering, where you still draw from and export to the grid throughout the year, netting to zero over the full year rather than being self-sufficient moment to moment.
Do I need battery storage to achieve net-zero?
Not necessarily — net-zero under net metering doesn't require battery storage since the grid serves as the netting mechanism; battery storage becomes relevant if you're also pursuing outage resilience or off-grid independence as separate goals.