How to Lower Your Electric Bill When You Have Solar Panels
Practical steps you can take today — most of them free
The Short Version
If your electric bill is still high despite having solar, the problem usually isn’t your panels — it’s how your energy use lines up (or doesn’t) with what your system produces. The good news? Several of the most effective fixes cost nothing. They just require knowing what to change.
This guide walks through 8 specific ways to lower your bill, ordered by impact — starting with the changes that cost $0.
1. Switch to the Right Rate Plan
💰 Cost: Free | Potential savings: $300–$1,200/year
This is the single most overlooked savings opportunity for solar homeowners. Many people are still on the rate plan their utility assigned by default — and it’s almost never the best one for solar.
With solar panels, your energy pattern is different from a typical household. You produce power during the day and consume most of it in the evening. The right time-of-use (TOU) rate plan rewards that pattern. The wrong one penalizes it.
Here’s what to do: Log into your utility account (SCE, PG&E, SDG&E) and look at which rate plan you’re on. Then compare it against the TOU options available for solar customers. In California, plans like TOU-D-PRIME (SCE) or E-TOU-D (PG&E) are designed for solar — they have lower on-peak rates and more favorable export credits.
Switching takes about 10 minutes online and goes into effect on your next billing cycle. No phone calls, no appointments, no cost.
💡 Why This Gets Tricky
The “best” rate plan depends on your specific usage pattern — when you use power, how much you export, and what your utility charges during each time window. Two neighbors with identical solar systems can save very different amounts on the same plan. That’s why generic advice only goes so far.
2. Shift Heavy Loads to Solar Hours
💰 Cost: Free | Potential savings: $200–$800/year
Every kWh you use from your own solar panels is a kWh you don’t buy from the grid at 40-50¢. Load shifting is free money.
The concept is simple: run your biggest energy consumers when your panels are producing the most. That usually means between 9 AM and 3 PM.
What to shift:
- EV charging: If your car is home during the day, charge it from solar instead of overnight. This alone can save $50–$100/month on some TOU plans.
- Pool pump: Program it to run from 10 AM–2 PM instead of early morning or evening. Most pumps have built-in timers.
- Dishwasher & laundry: Run these during peak solar production. Use delay-start features if you won’t be home.
- Water heater: If you have an electric water heater with a timer, set it to heat during midday solar hours.
You don’t need to shift everything — even moving 1-2 big loads makes a meaningful difference.
3. Understand Your Net Metering Credits
💰 Cost: Free | Impact: Avoid costly mistakes
If you don’t understand how your utility credits solar exports, you can’t make smart decisions about usage, batteries, or system upgrades.
Net metering rules determine how much your utility pays you for the solar energy you send back to the grid. And they’ve changed dramatically in recent years.
Under California’s NEM 3.0 (which applies to most systems installed after April 2023), export credits are much lower than what you pay for grid power. That means sending solar to the grid at 8¢/kWh and buying it back at 48¢/kWh is a losing trade. Every kWh you can use directly from your panels — or store in a battery — is worth far more than exporting it.
If you’re on legacy NEM 1.0 or 2.0, your exports are worth more, but you still benefit from understanding the timing. Your true-up bill at the end of the year is where surprises often hide.
4. Check for Panel Performance Issues
💰 Cost: Free to check | Potential savings: Varies widely
If your panels aren’t producing what they should, every other optimization strategy is working with a handicap.
Open your solar monitoring app (Tesla, Enphase, SolarEdge, etc.) and look at recent production. Compare it against what your system was producing in the same month a year or two ago. A significant drop — say 15% or more beyond normal seasonal variation and degradation — suggests something is wrong.
Common culprits:
- Dirty panels: Dust, pollen, bird droppings, and tree debris can reduce output by 5-25%. A garden hose or professional cleaning fixes this.
- New shading: Trees grow. A branch that wasn’t a problem three years ago might now shade panels during peak hours.
- Inverter issues: Microinverters or string inverters can fail silently. Check your app for any panels or strings showing zero or unusually low production.
- Wiring or connection problems: Less common but worth checking if multiple panels underperform.
If your monitoring app shows everything normal but your bills are still high, the issue is likely on the consumption side — not the production side.
5. Hunt Down Energy Waste
💰 Cost: Free | Potential savings: $100–$500/year
Most homes have 200-400 watts of “always-on” power draw running 24/7. That’s $300-$600/year in some rate zones — money you’re spending while you sleep.
Always-on loads are devices that draw power around the clock: old refrigerators, cable boxes, gaming consoles in standby, pool heaters, garage freezers, and phantom loads from chargers and smart home devices.
How to find them: Look at your utility’s hourly usage data (most utilities provide this online). Check your consumption at 3 AM — that’s your baseline “always on” load. If it’s above 500 watts, you likely have waste to eliminate.
Common fixes: unplug second refrigerators or freezers you don’t need, put entertainment centers on smart power strips, check pool heater settings, and replace any appliance that’s running inefficiently.
6. Optimize Battery Settings (If You Have One)
💰 Cost: Free | Potential savings: $200–$800/year
Many battery owners leave their system in default mode. Adjusting the settings to match your TOU rate schedule can dramatically improve savings.
If you have a battery system, make sure it’s programmed to:
- Charge from solar during midday production hours (not from the grid)
- Discharge during on-peak hours (typically 4-9 PM) when grid rates are highest
- Reserve capacity for backup only if you actually need outage protection — otherwise, use 100% of the battery for bill savings
Tesla Powerwall users: check if you’re in “Self-Powered” mode vs. “Time-Based Control.” Time-Based Control, set to match your utility’s TOU schedule, usually saves more money. Enphase users: make sure your charge/discharge profile matches your rate plan windows.
7. Consider Adding Battery Storage
💰 Cost: $10,000–$15,000 | Potential savings: $1,000–$2,000/year
Batteries aren’t right for everyone, but for households with heavy evening usage and modern net billing (NEM 3.0), they can cut bills dramatically.
A battery stores your daytime solar production and releases it during expensive evening hours — instead of exporting at low credit rates and importing at high retail rates. The economics depend heavily on your usage pattern, rate plan, and available incentives.
Before spending $10,000+, make sure you’ve done tips 1-6 first. Many homeowners find that free optimizations reduce their bill enough that the battery payback period doesn’t make financial sense. Others find that a battery is the missing piece after they’ve already optimized everything else.
Read our full battery storage guide for the honest math on whether it pencils out for your situation.
⚠️ Important: Federal Tax Credit Expired
The 30% federal residential clean energy tax credit (Section 25D) expired December 31, 2025. State and utility rebates like California’s SGIP program may still be available — check current incentive programs before making a battery decision.
8. Evaluate Whether Your System Is Undersized
💰 Cost: $5,000–$15,000 for additional panels | Impact: Varies
If your system was designed to cover 70-80% of your usage, you’ll always have a bill. That might have been fine under old net metering rules, but under NEM 3.0, the economics of adding panels can be very different.
Before adding panels, ask yourself: Am I still paying for grid power because my system is too small, or because I’m using power at the wrong times? Tips 1-6 answer that question. If you’ve optimized everything and your system still can’t cover your usage, adding panels might make sense.
Our free calculator can show you how many panels your home needs for 100% energy offset — a useful benchmark for understanding whether your current system is right-sized.
The Priority Order: What to Do First
Not all optimizations are equal. Here’s the order that makes the most financial sense — always exhaust the free options before spending money:
| Priority | Action | Cost | Typical Savings |
|---|---|---|---|
| 1 | Switch to optimal rate plan | Free | $300–$1,200/yr |
| 2 | Shift heavy loads to solar hours | Free | $200–$800/yr |
| 3 | Optimize battery settings | Free | $200–$800/yr |
| 4 | Eliminate energy waste | Free | $100–$500/yr |
| 5 | Clean panels / fix shading | $100–$300 | Varies |
| 6 | Add battery storage | $10,000+ | $1,000–$2,000/yr |
| 7 | Add more panels | $5,000+ | Varies |
💡 The Pattern
The first four items on this list are free and can often save $500–$2,000+ per year combined. Most solar homeowners haven’t done all of them. Start there before considering any equipment purchases.
“Getting solar has proven to be one of the most disappointing experiences. My true up bills are over $2,500 annually and my solar seller/installer has been zero help in determining what the issue(s) is and how to address it.
PowerMy has been amazing. They are truly independent and can provide unbiased insight and through their system I now have a clear understanding of the issue and what my options are to realize the benefits of why we went solar.”
— Gregg K., Rancho Mirage
Frequently Asked Questions
Q: Will switching rate plans actually make a big difference?
It can be enormous. We’ve seen cases where switching from a default flat rate to the right TOU plan saved over $1,000/year — with zero changes to behavior or equipment. The catch is that the “best” plan depends entirely on your usage pattern. A plan that saves your neighbor money could cost you more if your consumption happens at different times.
Q: How do I know if my solar system is undersized?
Compare your annual solar production (available in your monitoring app) against your annual consumption (on your utility bill or account). If your system produces less than 80-90% of what you consume, it may be undersized. But before concluding that, make sure you’ve optimized rate plans and usage timing — sometimes the gap isn’t about system size, it’s about when you’re using power.
Q: My installer says I need more panels. Should I trust them?
Your installer may be right — but they also have a financial incentive to sell you more equipment. Before committing to a $10,000+ purchase, get independent data on whether your current system is underperforming, whether cheaper optimizations (rate plan, load shifting) would solve the problem, and whether the added panels will actually deliver the savings they’re projecting. An independent second opinion can save you thousands.
Q: Is it worth cleaning my solar panels?
It depends on where you live. In dusty desert areas (Coachella Valley, Central California), dirty panels can lose 15-25% of production. In rainy climates, rain does most of the cleaning. Check your production data month-over-month — if you see a gradual decline that doesn’t match seasonal patterns, dirt might be the cause. A professional cleaning costs $100-$300 and is usually worth it once or twice a year in dusty areas.
Q: Can I lower my bill without spending any money?
Absolutely. Switching rate plans, shifting heavy loads to solar hours, adjusting battery settings, and eliminating energy waste are all free. Most solar homeowners can save $500–$1,500/year just from these changes. The hard part is knowing exactly which changes to make for your specific situation — because the right answer depends on your usage pattern, your utility, and your system setup.
Related Guides
Not Sure Where to Start?
Our free calculator shows how many panels your home needs for 100% energy offset and recommends a battery size based on your usage — a good first step toward understanding what’s going on with your system.
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