A well-sized solar system with net metering can reduce your electricity bill dramatically — often close to zero in sunnier months — but "eliminate" is rarely exact, since grid connections typically carry a minimum charge and your consumption still varies by season. Realistically, most twin-cities homes see their bill fall to a small fraction of what it was before solar, with the biggest drops during high-sun months.
Why a bill rarely hits exactly zero
- Grid connection charges: Even fully net-metered customers usually retain a base grid connection fee.
- Seasonal variation: Winter fog can reduce panel output on some days, meaning grid draw increases slightly during those months even though panels still produce in diffuse light.
- System sizing vs. usage: If your consumption grows (new appliances, AC units) beyond what the system was designed for, some grid draw becomes unavoidable unless the system is upgraded.
How close to zero can you realistically get?
A properly sized system matched to your historical consumption — determined during a free site survey — is the key variable. For example, a 5kW system generating roughly 550-750 units per month can cover most or all of a moderate household's usage, with net metering crediting any surplus exported to the grid against future draw.
Sizing for near-zero bills
Tripower's system design step looks at your last 12 months of bills to size a system that maximizes offset without drastically over-building (which adds cost without proportional benefit). An energy audit — one of Tripower's services — can also identify ways to reduce baseline consumption before sizing the system, tightening the gap further.
What if my bill still isn't at zero?
If usage grows over time, a system upgrade or retrofit can add capacity. Battery backup can also shift more of your usage to solar-generated and stored power during outages or evening hours, though its primary role is reliability rather than bill elimination. For load-shedding-specific needs, see our guide on solar and battery backup solutions.
Talk to Tripower about sizing a system for your actual usage.
Frequently Asked Questions
Does net metering guarantee a zero bill?
No, net metering credits exported surplus against your usage but doesn't remove baseline grid connection charges, so a small residual bill is normal.
Can oversizing a system get me to zero faster?
Oversizing can increase the offset, but it adds upfront cost without proportional savings once you're already exporting most surplus, so right-sizing is usually more cost-effective.
Does an energy audit help reduce my bill further?
Yes, an energy audit identifies inefficient usage patterns or appliances, which can lower your baseline consumption and make it easier for solar to cover a larger share of your bill.