Solar Only vs Solar + Battery: Which Should You Get?
If you are weighing solar for your home, you will quickly face a second question: should you add a battery too? A few years ago, most homeowners went solar-only and leaned on the grid to store their excess power. Today, with net metering credits shrinking in many states, a battery is becoming a much more common part of the plan. Here is what a battery actually adds, what it costs, and when solar-only still makes sense.
How solar-only works
A solar-only system sends power straight from your roof to your home during daylight hours. When your panels make more than you use, the extra flows back to the grid. When your panels make less, at night or on cloudy days, you pull power from the grid as usual.
The economics of solar-only depend heavily on net metering, the arrangement where your utility credits you for the power you export. For years, many utilities credited that exported power at the full retail rate, which made solar-only a strong deal. The catch: when the grid goes down, a standard grid-tied solar system shuts off for safety, so solar-only usually gives you no backup power during an outage.
What a battery adds
A home battery like the Tesla Powerwall stores the extra power your panels make so you can use it later. That unlocks three main benefits.
1. Backup power during outages
This is the benefit homeowners feel most. When the grid goes down, a battery keeps your essentials, or even your whole home, running. Your fridge stays cold, your lights stay on, and your solar can keep recharging the battery during the day. Solar-only cannot do this on its own.
2. Using your own solar instead of exporting it
This is called self-consumption. Instead of sending midday solar to the grid for a small credit, you store it and use it yourself in the evening when your panels are done for the day. The less you pull from the grid, the more you save, and the more of your own clean power you actually use.
3. Time-of-use savings
Many utilities now charge more for electricity during peak hours, often late afternoon and evening. With a battery, you can store cheap or self-made power and use it during those expensive windows instead of buying from the grid. This can meaningfully lower your bill on time-of-use rate plans.
Why net metering changes the math
The biggest reason batteries are surging in popularity is the shift in net metering. California's NEM 3.0 is the best-known example: it sharply reduced how much homeowners are paid for power they export to the grid. Other states are moving in the same direction.
When exported power earns you a lot, solar-only makes strong financial sense, because the grid effectively acts as your free battery. When exported power earns you very little, that model breaks down. Exporting a kilowatt-hour for a few cents and buying it back later at full retail price is a losing trade. A battery lets you keep and use that power yourself instead, which is why reduced net metering is pushing so many homeowners toward solar plus storage.
What about cost?
A battery is a meaningful added expense on top of solar. A Tesla Powerwall 3 starts around $9,200 or more for the hardware, plus installation, which varies based on your electrical panel, the complexity of the work, and how many units you need. You will get an exact figure before your final quote.
It is also worth being clear about incentives. The 30% federal Residential Clean Energy Credit that covered solar and batteries ended after December 31, 2025, so you should not count on it going forward. However, some states and utilities still offer their own storage and solar programs, and these change often. Confirm what is available in your area, and consult a tax professional about your specific situation.
When solar-only still makes sense
A battery is not mandatory for everyone. Solar-only can still be the right call if:
The good news is that many systems can be designed to add a battery down the road, so starting with solar-only does not lock you out of storage forever. That said, planning for a battery from the start can simplify the wiring and avoid rework.
- Your utility still offers strong net metering. If you are credited at or near retail rates for exported power, the grid is doing the battery's job for you at low cost.
- Outages are rare where you live and backup power is not a priority for you.
- Your budget is tight and you want to keep the upfront cost down. You can often add a battery later.
- You are not on a time-of-use rate and your peak-hour usage is low.
How to decide
Ask yourself a few questions. How does your utility credit exported power, and is that likely to shrink? How often does your area lose power, and how much do outages disrupt your life? Are you on a time-of-use rate with expensive evening peaks? Your answers point clearly toward one option or the other.
For a growing number of homeowners, especially those in areas with reduced net metering or frequent outages, solar plus a battery is becoming the default choice rather than an upgrade.
Where Charge Home Solutions fits in
Charge Home Solutions specializes in the electrical side of going solar. We do not install solar panels, but we are the battery and electrical experts who make homes solar-ready and resilient. We install the Tesla Powerwall, upgrade electrical panels to handle solar and storage, and add EV chargers.
As a Tesla Energy Certified and SPAN Certified, licensed and insured company, we handle the permits and inspections your battery installation requires, and we make sure your panel can support everything you are asking it to do. Whether you already have solar and want to add storage, or you are planning the whole project, call us at 888-995-6044 to talk through the right setup for your home.
Frequently asked questions
Yes. A battery like the Tesla Powerwall keeps your home running during an outage, powering essentials or your whole home depending on the design. Standard grid-tied solar without a battery shuts off during outages for safety, so it provides no backup on its own.
If your utility still credits exported power at or near retail rates, solar-only can make strong financial sense, since the grid stores your excess cheaply. A battery still adds backup power, though. As net metering shrinks under rules like NEM 3.0, batteries become far more compelling.
Often yes. Many systems can be designed to add storage down the road, so starting solar-only does not lock you out. Planning for a battery from the start can simplify the wiring, so it is worth discussing your plans with your installer early.
A Tesla Powerwall 3 starts around $9,200 or more for the hardware, plus installation, which varies with your panel, the complexity of the job, and how many units you need. You will get an exact figure before your final quote.
Related guides
How Much Do Home Solar Panels Cost in 2026?
In 2026, home solar commonly costs about $2.50-$3.50 per watt installed, so a typical system often lands roughly $15,000-$30,000 before any incentives, depending on size and roof. The 30% federal credit...
Read article →Is Solar Worth It in 2026 After the Federal Tax Credit Ended?
Solar can still be worth it in 2026, but the answer depends on your local electricity rates, sun exposure, and net-metering rules now that the 30% federal credit has ended. It pays off fastest for homes...
Read article →How Many Solar Panels Does Your Home Need?
To size a solar system, divide your yearly electricity use in kilowatt-hours by your local sun-hours, then divide by each panel's wattage. Most homes need roughly 15 to 25 panels, but your real number...
Read article →Solar: Buy, Loan, Lease, or PPA, Which Is Best?
There are four common ways to pay for solar: cash purchase, a solar loan, a lease, or a power purchase agreement (PPA). Buying (cash or loan) means you own the system and keep the long-term value. Leases...
Read article →Net Metering Explained (and What NEM 3.0 Changed)
Net metering is a billing arrangement that credits you for extra solar power your home sends to the grid. Traditionally that credit matched the full retail rate, but many places now pay much less....
Read article →Do Solar Panels Work in Winter and on Cloudy Days?
Yes. Solar panels still work in winter and on cloudy days, just with less output. They run on daylight, not heat, so they can even be more efficient in cold weather, though clouds and shorter days reduce...
Read article →