Knowledge

If you have been researching affordable ways to cut your electricity bill, you have almost certainly come across the term plug-in solar. It has quickly become one of the most talked-about topics in home energy because it promises something that traditional rooftop panels never could: a low-cost, portable, and renter-friendly way to generate your own clean electricity without hiring an installer or pulling a single permit. But how does it really compare to a full rooftop array? In this guide, we break down the costs, energy output, savings, installation requirements, and the all-important question of whether it is right for you. Whether you own your home or rent an apartment, understanding the difference between these two approaches is the first step toward a smarter energy decision.

• Plug-In Solar vs Rooftop Solar: Understanding the Key Differences
• Upfront Costs: Plug-In Solar vs Rooftop Solar Compared
• Energy Output: How Plug-In Solar vs Rooftop Solar Differ
• Savings and Payback: Plug-In Solar vs Rooftop Solar Analysis
• Installation and Permits: Plug-In Solar vs Rooftop Solar
• Plug-In Solar vs Rooftop Solar: Which Is Better for Renters?
• Making the Right Choice: Plug-In Solar vs Rooftop Solar

Plug-In Solar vs Rooftop Solar: Understanding the Key Differences

At the most basic level, both plug-in solar and rooftop solar do the same thing: they convert sunlight into electricity that you can use in your home. The difference lies in scale, complexity, and permanence. A rooftop system is a structural addition to your house, typically measured in kilowatts, installed by licensed professionals, and connected directly to your main electrical panel through a dedicated inverter. A plug-in system, by contrast, is a small array — usually between 300 and 1,200 watts — that simply plugs into a standard wall outlet and feeds power directly into that circuit. The contrast could not be more dramatic, yet both have a legitimate place in a modern energy strategy.

Understanding these fundamental differences matters because it shapes everything else: how much you pay, how much energy you produce, whether you need approval from your utility, and whether you can take the system with you when you move. Many people assume that bigger always means better, but that is not necessarily true when you factor in your living situation, budget, and how long you plan to stay in one place. A renter in a small apartment, for instance, would get far more practical value from a plug-in setup than from a rooftop array they are not even allowed to install.

What Plug-In Solar Actually Is

Plug-in solar is sometimes called balcony solar or plug-and-play solar, and the name is fitting. The system is made up of one or more compact panels, usually with a microinverter already attached, plus a cable that terminates in a standard AC plug. You position the panels on a balcony railing, a patio, a garden wall, or even a sunny windowsill, and then you literally plug them into an outlet. Because the electricity is fed into the home at a single point, it offsets the power that would otherwise be drawn from the grid for nearby appliances, from lights and fans to laptops and phone chargers.

The appeal of plug-in solar is that it removes almost every barrier that has historically kept people out of the solar market. There is no complex wiring, no roof penetration, no structural engineering, and no waiting months for permits and approvals. In many regions, a small plug-in system under a certain wattage threshold is treated as an appliance rather than a power plant, which means it can be used with minimal or even zero regulatory friction. That simplicity is precisely why the category has exploded in popularity across Europe and is now catching on rapidly elsewhere.

What Rooftop Solar Actually Is

Rooftop solar is the classic image of residential energy independence: a large array of panels bolted to your roof, an inverter mounted on a wall, and a connection into your home's breaker panel. These systems are engineered to cover a significant share — or even all — of a household's electricity consumption. A typical residential array ranges from four to ten kilowatts, which is anywhere from ten to more than forty times the output of a single plug-in kit. That scale is what allows rooftop solar to meaningfully reduce, and sometimes eliminate, a home's monthly electric bill.

With that scale, however, comes a much heavier process. A rooftop installation involves a site survey, an engineering review, building and electrical permits, utility interconnection approval, and a professional crew working on your roof for one to several days. The system is permanently affixed to the property, which means it is treated as part of the home in most transactions. That permanence is a benefit for long-term homeowners — solar-equipped houses tend to sell faster and for more — but it is a liability for anyone who may need to move in a few years.

Scale, Portability, and the Ownership Question

The cleanest way to think about the two options is through three lenses: scale, portability, and ownership. Rooftop solar wins decisively on scale, producing many times more energy and delivering proportionally larger savings. Plug-in solar wins just as decisively on portability, because you can unplug it, pack it up, and take it with you on moving day. Ownership is where the decision becomes personal. A rooftop system is an investment in a property you own; a plug-in system is an investment in your own energy independence, wherever you happen to live. Neither is universally better — they simply serve different people in different situations.

Upfront Costs: Plug-In Solar vs Rooftop Solar Compared

Money is usually the first thing people ask about, and it is where the two technologies diverge most sharply. A complete plug-in solar kit — panel, microinverter, cabling, and mounting brackets — typically costs between $200 and $1,500 depending on output and build quality. A rooftop system, in contrast, commonly runs from $10,000 to $30,000 or more before any incentives are applied. That is an enormous gap, and it explains why plug-in solar is so attractive to first-time buyers, renters, and anyone who wants to dip a toe into solar without taking on a five-figure commitment.

The cost difference is not merely about the number of panels; it is about everything that surrounds them. Rooftop pricing includes engineering, permits, installation labor, inverters, mounting hardware, electrical upgrades, and often a new meter or interconnection fee. Plug-in pricing, by contrast, is essentially just the hardware. When you buy a balcony kit, you are paying for the panel and the inverter, and very little else. There is no labor bill because you install it yourself in under an hour, and there is no permit fee because the system typically falls below the threshold that triggers one.

Breaking Down the Plug-In Price Tag

For somewhere between $200 and $500, you can buy a basic single-panel plug-in system rated at 300 to 400 watts. At that price, you are getting an entry-level panel with a small microinverter and a short run of cable. Step up to the $600 to $1,000 range and you enter the sweet spot: two panels totaling 600 to 800 watts, often with better efficiency, more durable frames, and app-based monitoring so you can watch your production in real time. At the top end, around $1,200 to $1,500, you can find 1,000 to 1,200-watt systems designed for larger balconies or small yards, frequently with premium panels and weather-hardened components.

Because the total outlay is so modest, the financial risk of plug-in solar is extremely low. If the technology turns out not to work well in your specific location, you have lost a few hundred dollars at most, and you can likely resell the kit or relocate it. That low-risk entry point is one of the strongest arguments in favor of plug-in solar for people who are new to the category and want to see real-world results before committing to anything larger.

Ongoing and Lifetime Costs You Should Not Overlook

Upfront cost is only part of the financial picture, and comparing the two technologies honestly means looking at what happens after the purchase. Plug-in solar is about as low-maintenance as hardware gets: the panels need an occasional wipe to clear dust and bird droppings, the microinverter is a sealed unit with a multi-year warranty, and there are no moving parts to wear out. If a component fails, you can unplug it and swap it out yourself, often under warranty, with no service call and no labor bill. Over a decade, your total out-of-pocket cost beyond the original purchase is close to zero.

Rooftop solar carries a different ongoing profile. Modern panels are extremely durable and commonly carry 25-year performance warranties, and inverters last ten to fifteen years before they typically need replacement — a cost of $1,500 to $3,000 when the time comes. You may also face periodic cleaning if you live in a dusty or tree-heavy area, and some installers offer paid monitoring or maintenance plans. The upside is that a professionally installed, warrantied system is backed by workmanship guarantees and installer accountability that a self-managed plug-in kit simply does not have. When comparing lifetime cost, factor in both the near-zero upkeep of plug-in solar and the occasional, larger maintenance events of a rooftop array.

Why Rooftop Systems Cost So Much

A rooftop installation is a construction project, and it is priced like one. The panels themselves often account for less than a third of the total bill. The rest goes to the inverter or microinverters, racking and mounting, wiring and conduit, the electrician's time, the crew's labor, engineering drawings, permit applications, and utility interconnection. If your roof is old, steep, multi-story, or made of a difficult material like tile, costs climb further still. Homeowners who finance their systems also pay interest, which can add thousands of dollars to the lifetime cost even when the headline price looks reasonable.

That said, rooftop solar also unlocks incentives that plug-in solar usually cannot access. Federal tax credits, state rebates, and net metering programs are designed around full-scale systems, and they can reduce the effective cost of a rooftop array by 30 percent or more. A $20,000 system may end up costing the homeowner roughly $14,000 after the federal credit, which changes the math considerably. Plug-in systems, being treated more like appliances, rarely qualify for these large incentives, so their sticker price is closer to their true cost.

Upfront Cost Comparison Table

Energy Output: How Plug-In Solar vs Rooftop Solar Differ

There is no contest when it comes to raw output: rooftop solar produces dramatically more energy than plug-in solar. A single 400-watt plug-in panel in a good location might generate around 500 to 600 kilowatt-hours per year. A typical 6-kilowatt rooftop array in the same location could produce 8,000 to 10,000 kilowatt-hours annually. That is a difference of roughly fifteen to twenty times, and it is the reason a rooftop system can cover a large portion of a home's electricity needs while a plug-in system is better understood as a targeted supplement that shaves down the bills of specific circuits.

But raw output is not the whole story. What matters in practice is how much of that output actually offsets your consumption, and here plug-in solar can be surprisingly effective relative to its size. Because a plug-in kit feeds power directly into a circuit that is typically already running small, always-on loads — a refrigerator, a router, a TV on standby — the energy it produces is almost always consumed on the spot. There is very little waste. A rooftop system, while far larger, exports much of its production back to the grid during midday hours, and the value of that exported energy depends entirely on your utility's net metering policy.

Realistic Annual Production Expectations

Location and orientation dominate any production estimate, but you can build a reasonable picture with a few rules of thumb. A well-placed plug-in panel rated at 400 watts will deliver roughly 400 to 600 kilowatt-hours per year in a sunny region and perhaps 250 to 350 in a cloudier one. That is enough to run an efficient refrigerator, cover a laptop and home office setup, or power LED lighting for an entire household. Double the system to 800 watts and you can add a washing machine's weekly cycles or a good chunk of a home's standby and entertainment load.

Rooftop systems, by the same rule, produce roughly 1,200 to 1,500 kilowatt-hours per year for every installed kilowatt in good sun. A 6-kilowatt system therefore lands in the 7,000 to 9,000 kilowatt-hour range annually, which is enough to cover the full electricity consumption of many average households. The output is also more resilient to partial shading because installers optimize panel placement and often include power optimizers or microinverters that isolate the performance of each panel.

Orientation, Shading, and Seasonal Effects

Plug-in solar is far more sensitive to its environment than a professionally installed array. A balcony kit is often limited to a single railing or wall, which means you may be stuck with a less-than-ideal orientation — west- or north-facing, or partially shaded by the building next door. Because these systems typically use a single string inverter or a single microinverter, shade on one panel can drag down the output of the entire kit. That is not a fatal flaw, but it does mean your real-world results may fall well short of the panel's nameplate rating if your placement is compromised.

Rooftop solar, by contrast, is engineered to the specific site. Installers measure the roof's pitch and azimuth, map shade patterns across the year, and arrange panels to maximize annual production. Seasonality affects both technologies — winter production is lower everywhere — but a rooftop array's larger size means it still generates meaningful power even on short, dim days, whereas a single plug-in panel may produce very little in the depths of winter. If your goal is meaningful year-round production, size simply cannot be ignored.

Pairing Solar with Battery Storage

A growing number of people are combining their panels with battery storage, and this is where the two systems behave differently. Rooftop arrays are commonly paired with large home batteries — wall-mounted units with several to more than ten kilowatt-hours of capacity — that store midday surplus for evening use or backup during outages. These battery systems typically add $8,000 to $15,000 to the project cost, but they dramatically improve the value of the solar energy by letting you use your own power at night instead of selling it back to the grid at low export rates.

Plug-in solar can also be paired with storage, though usually at a smaller scale and increasingly through do-it-yourself builds. Enthusiasts are pairing balcony panels with portable power stations or self-assembled battery packs built from high-quality lithium iron phosphate cells, a trend that gives a modest plug-in kit the ability to hold its daytime production for use after dark. This do-it-yourself approach is far more affordable than a turnkey home battery, and it lets a renter or first-time buyer experiment with energy storage without a five-figure commitment. The combination of cheap plug-in solar and flexible storage is quietly making real energy independence accessible to people who could never have afforded a full rooftop-plus-battery package.

How Much of Your Bill Each Can Offset

The practical question is not "how much can it produce" but "how much of my bill can it erase." A 400-watt plug-in system in a sunny climate might cut $60 to $90 off an annual electricity bill. An 800-watt kit could push that to $120 to $180 per year. Those are modest but real savings, and they arrive with almost no effort. A 6-kilowatt rooftop system in the same climate could offset $1,200 to $1,800 per year — the difference between a nice-to-have and a genuine financial strategy. Understanding this gap is essential before you commit money to either path.

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Savings and Payback: Plug-In Solar vs Rooftop Solar Analysis

When you spend money on solar, you want to know two things: how much you will save each year, and how long it will take for those savings to repay your initial investment. This is where the comparison between plug-in solar and rooftop solar becomes genuinely interesting, because the cheaper option is not automatically the better deal — and the more expensive option is not automatically the worse one. Payback depends on the relationship between what you spend, what you save, and how long you stay put.

The headline numbers are revealing. A $500 plug-in kit that saves $70 per year pays for itself in a little over seven years. A $1,000 kit saving $150 per year pays back in about six and a half years. A $18,000 rooftop system that saves $1,500 per year pays back in twelve years before incentives — but with the federal tax credit and net metering, its effective payback often drops to seven to nine years. In other words, both technologies can land in a similar payback window, which surprises many people who assume the small system must be the better pure investment.

Calculating Plug-In Solar Savings

Plug-in solar savings are simple to estimate because the system is small enough to model. Multiply the system's realistic annual production in kilowatt-hours by your local electricity rate. If your utility charges $0.15 per kilowatt-hour and your 400-watt kit produces 500 kilowatt-hours per year, you save about $75 annually. If you live in a high-rate area like California or Hawaii, where electricity can exceed $0.30 or $0.40 per kilowatt-hour, the same kit saves $150 to $200 per year — dramatically shortening the payback period. This is why plug-in solar makes the most financial sense in regions with expensive power.

One subtle advantage of plug-in solar is that its savings are nearly guaranteed. Because the system only feeds power into a single circuit, and because that circuit almost always has some background load, the electricity you produce is virtually always consumed. There is no question of whether you will be paid for excess energy — there is rarely any excess. This makes the savings predictable and easy to bank on, even if the total dollar amount is small relative to a full rooftop array.

Calculating Rooftop Solar Savings and Payback

Rooftop savings are larger but more complicated to predict because they hinge on net metering. In states with full-retail net metering, every kilowatt-hour your panels produce is worth the full retail rate, whether you use it immediately or export it. In states that have moved to time-of-use or avoided-cost rates, exported energy may be worth much less, which stretches the payback period. Your household's consumption pattern also matters: a family that is home during the day and uses appliances while the sun shines captures more value than a household that is empty until evening.

Incentives are the wildcard that can transform rooftop economics. The federal Investment Tax Credit currently allows homeowners to deduct 30 percent of the installed cost from their federal taxes, and many states and utilities add rebates on top. A $20,000 system with a 30 percent credit effectively costs $14,000. If it saves $1,400 per year, payback is ten years without accounting for rising utility rates; with even modest annual rate inflation, that payback can compress to eight years or fewer. For a homeowner who plans to stay put for a decade or more, the system then generates a decade or two of essentially free electricity.

The Lifetime Value Picture

Over a 25-year lifespan, the two options tell very different stories. A plug-in kit will produce a steady trickle of savings that comfortably repays its modest cost several times over, but the absolute dollars remain small — perhaps $1,500 to $4,000 in total lifetime savings for a typical kit. A rooftop system, by contrast, can generate $30,000 to $60,000 in lifetime savings in a high-rate area, far exceeding its cost. The conclusion is that plug-in solar offers excellent, low-risk returns on a small amount of money, while rooftop solar offers larger returns on a much larger commitment. Neither is a bad deal; they simply operate on different scales.

Installation and Permits: Plug-In Solar vs Rooftop Solar

Installation is where the experience of the two technologies could not be more different, and it is arguably the single biggest reason plug-in solar has attracted so much attention. Setting up a plug-in kit involves unfolding or mounting the panel, aiming it at the sun, and plugging it into a standard outlet. The entire process takes under an hour and requires no special tools, no electrical knowledge, and no help from a professional. Setting up a rooftop system involves a multi-week journey through surveys, engineering, permitting, inspections, and a crew of trained installers working on your roof.

This gap in complexity has real consequences beyond convenience. It determines whether you can install the system at all — renters cannot mount panels on a roof they do not own — and it determines how long you have to wait before your system starts producing. A plug-in kit can be generating power the same afternoon it arrives in the mail. A rooftop system may take two to four months from signed contract to final inspection, and longer still if your local permitting office is backed up or your utility is slow to approve the interconnection.

The Plug-In Installation Experience

The typical plug-in solar kit ships as a compact box containing one or two panels with integrated microinverters, a set of mounting brackets or clamps, and a cable ending in a standard plug. Most kits are designed for balcony railings, flat roofs, or ground placement, with brackets that hook on without drilling. You fasten the panels securely, angle them toward the sun, and plug the cable into any grounded outlet. Some manufacturers recommend a simple WiFi or Bluetooth setup so you can monitor production from a smartphone app, but that step is optional and takes minutes.

The one piece of diligence you should not skip is checking your local rules. In many jurisdictions, plug-in systems under a wattage threshold — commonly 800 watts in parts of Europe, with varying limits in North America — are treated as appliances and require no permit. In others, you may be required to notify your utility or install a dedicated plug with a special connector. Always verify the rules in your area and, if in doubt, use a system size and connection method that comply. The good news is that even the strictest plug-in rules are trivial compared to what a rooftop installation demands.

The Rooftop Installation Journey

A rooftop project begins with a site assessment, in which an installer examines your roof's age, pitch, orientation, and shading, and reviews a year of your electricity usage to size the system. From there, engineers draft plans, the installer files for building and electrical permits, and your utility is asked to approve the interconnection. Once permits clear, a crew spends one to three days installing racking, panels, inverters, and wiring, followed by inspections from both the building department and the utility. Only after the utility gives final approval — often signaled by swapping in a bidirectional meter — does the system go live.

This process is not a reason to avoid rooftop solar, but it is a reason to plan for it. The permitting and interconnection steps alone frequently add four to eight weeks, and the total timeline from contract to power can stretch to several months. The payoff is a system that is engineered, inspected, and warrantied to perform for decades, backed by workmanship guarantees from the installer. For a homeowner with the time and budget, that permanence and peace of mind are worth the wait.

Safety, Code, and What "Plugging In" Really Means

A fair question people ask about plug-in solar is whether it is safe to feed power into a standard outlet. The answer is that modern plug-in kits are designed with multiple layers of protection — the microinverter shuts off the moment it loses contact with the grid, a feature called anti-islanding that prevents back-feeding during an outage. That is the same safety mechanism found in rooftop inverters. The electrical code in many places specifically accommodates plug-in generation below certain limits precisely because of these built-in safeguards. Still, you should follow the manufacturer's guidance, use a properly grounded outlet, and avoid daisy-chaining multiple systems onto a single circuit beyond its rating.

Plug-In Solar vs Rooftop Solar: Which Is Better for Renters?

For renters, this question practically answers itself: plug-in solar is the only one of the two that is even available. A tenant cannot install a rooftop array on a property they do not own, and most landlords are understandably unwilling to put holes in a roof or assume a decades-long contract for the benefit of a tenant who might leave next year. Plug-in solar, however, requires no modifications to the building, no permit, and no commitment to the property — you can mount panels on a balcony or patio, plug them in, and take them with you when the lease ends.

This distinction is why plug-in solar has become known as the renter's solar solution. It gives people who do not own their home a legitimate way to participate in the clean energy transition and reduce their own bills, something that was effectively impossible just a few years ago. The fact that the system is portable changes the entire psychology of the purchase: it is not an investment in a building you might leave, but an investment in a piece of hardware you will own and use for years, wherever you live.

What Renters Gain from Plug-In Solar

The obvious benefit is the bill reduction, but the gains go further. A renter with a plug-in kit gains energy independence on a small but meaningful scale — the ability to power certain loads with sunlight regardless of what the utility does with its rates. The kit also serves as a hedge against rising electricity prices, because the energy it produces is locked in at zero marginal cost for the life of the panels. And because the equipment is portable, the renter never has to negotiate with a landlord, share savings, or worry about recovering their investment when they move.

There is also a less obvious but very real benefit: learning. Running a plug-in system teaches you how solar production works in the real world — how orientation, seasons, and shading affect output — using real data from your own balcony. For a renter who eventually hopes to own a home with a rooftop array, this is a low-cost education that will make them a far more informed buyer later. Few other investments of a few hundred dollars deliver both savings and practical knowledge.

What Renters Miss by Skipping Rooftop Solar

The trade-off is scale. A plug-in kit will never come close to covering a full household's consumption, so a renter's savings are capped in the tens or low hundreds of dollars per year rather than the thousands a rooftop system could deliver. Renters also forgo the large incentives — the federal tax credit and net metering programs — that make rooftop solar so financially powerful for owners. And a renter cannot use solar to power the biggest loads, such as air conditioning or an electric vehicle, at least not at any meaningful level with a 300-to-1,200-watt system.

There are also practical constraints to consider. A renter needs a suitable outdoor space — a balcony, terrace, or accessible wall — with at least a few hours of direct sun, and they may need their landlord's permission to mount panels on a railing even if the installation is non-destructive. Some buildings have rules about anything visible from the exterior. These are minor hurdles compared to the impossibility of a rooftop installation, but they are worth checking before you buy.

Who Should Think Twice

Plug-in solar is not a perfect fit for every renter. If your apartment faces north, is heavily shaded, or has no outdoor space at all, a kit may produce so little energy that the savings never justify even its low cost. In that case, alternatives such as community solar — where you subscribe to a share of an off-site array — may deliver better value. But for the large number of renters with a sunny balcony or patio, plug-in solar is a genuinely practical, immediately actionable way to start generating clean power today, with none of the barriers that lock renters out of rooftop solar entirely.

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Making the Right Choice: Plug-In Solar vs Rooftop Solar

By now the picture should be clear: this is not really a contest between two competing products so much as a choice between two different tools for two different situations. Rooftop solar is the heavyweight — expensive, powerful, permanent, and financially transformative for homeowners who stay put. Plug-in solar is the nimble option — cheap, portable, instant, and accessible to renters and homeowners alike. The right choice depends on who you are, where you live, and what you are trying to achieve.

The best way to decide is to answer a short series of questions honestly. Do you own your home or rent? How long do you plan to stay? How much of your electricity bill do you actually want to offset? Do you have an unshaded roof or a sunny balcony? What is your budget? Once you have those answers, the path forward becomes obvious, and in many cases the answer is not "one or the other" but "start small now, and go big later."

Choose Plug-In Solar If...

You should lean toward plug-in solar if you are a renter, if you live in an apartment or condo, if your budget is under a few thousand dollars, or if you simply want to start generating clean energy today without a multi-month installation process. It is also the right call if you move frequently, if you value portability, or if you want a low-risk way to learn how solar works before committing to a larger system. The barrier to entry is so low that there is very little reason not to try it, provided you have a sunny spot to place the panels.

Plug-in solar is especially compelling in high-electricity-rate regions, where even a small system's savings add up quickly, and in rental markets where it is the only option available. It also pairs beautifully with a growing ecosystem of portable power stations and home batteries, letting you capture daytime generation for use in the evening. If the goal is modest, tangible savings with maximum flexibility, plug-in solar is the clear winner.

Choose Rooftop Solar If...

Rooftop solar is the right choice if you own a home with a roof in good condition, plan to stay for seven to ten years or more, and want to offset a large share of your electricity bill. It is the only option that can realistically power air conditioning, heat pumps, and electric vehicles, and it is the only option that unlocks major incentives like the federal tax credit and full net metering. If you have the budget and the timeline, a rooftop array is one of the best long-term investments a homeowner can make, often outperforming the stock market on a risk-adjusted basis when utility rates are high.

Rooftop solar also adds measurable value to the property itself, which matters if you might sell before the system fully pays for itself. Studies consistently show that homes with owned solar sell faster and for more than comparable homes without it, allowing many sellers to recover the remaining cost of the system in the sale price. That exit strategy simply does not exist with plug-in solar, which is why the two products are complementary rather than competitive.

A Strategy That Uses Both

Perhaps the most underrated option is to use both technologies together. A homeowner could install a rooftop array to carry the heavy lifting while adding a small plug-in system on a patio or garden shed to squeeze out extra production, or a renter could start with a plug-in kit now and plan a full rooftop installation when they eventually buy. Many people also pair plug-in solar with a DIY battery storage build, storing cheap daytime energy for nighttime use and building the foundation for a home energy system that grows with their needs. The future of home energy is not about picking one technology and ignoring the other; it is about building a system that matches your life, your budget, and your goals.

Whatever path you choose, the most important step is the first one. Whether that means plugging in a balcony kit this weekend or scheduling a rooftop consultation, the sooner you start generating your own clean electricity, the sooner the savings begin. For most people starting out, plug-in solar remains the easiest, cheapest, and most flexible way to take that first step toward energy independence.