What brands of solar panels do you recommend?

We recommend tier-1 solar panel manufacturers with proven track records, strong warranties, and reliable U.S. distribution. Top brands we frequently specify include Q CELLS, REC Solar, Silfab (North American made), Panasonic, LG (though being phased out), Canadian Solar, JinkoSolar, Trina Solar, and LONGi Solar. The best choice depends on your specific priorities - some prioritize maximum efficiency, others focus on best value, and some prefer panels manufactured in the USA. Tier-1 manufacturers have been in business for at least 5 years, have automated production lines, and are bankable (meaning banks will finance projects using their panels). This matters because you want the manufacturer to still be around in 25 years to honor warranties. Most quality panels today offer 25-year performance warranties guaranteeing 80-85% output after 25 years, and 10-15 year product warranties covering defects. Efficiency ranges from 19-22% for standard panels, with premium models reaching 22-23%. We provide specific panel recommendations in our designs based on your roof space, budget, and performance goals. All recommended panels are UL-certified and meet U.S. building codes.

Should I choose string inverters or microinverters?

The choice between string inverters and microinverters depends on your specific situation. String inverters are centralized units that convert DC power from all panels to AC power, typically costing less upfront and offering high efficiency (97-99%). They're ideal for unshaded roofs with all panels in the same orientation and tilt. However, the entire array performs at the level of the weakest panel, and string inverters typically need replacement after 10-15 years. Microinverters attach to each individual panel, converting DC to AC right at the panel. They cost more upfront but offer panel-level optimization (each panel performs independently), better performance in partially shaded conditions, easier system expansion, and longer warranties (25 years). Microinverters also provide panel-level monitoring, making it easier to identify and fix issues. For most DIY installations, we recommend microinverters (especially Enphase) because they're safer to work with (no high-voltage DC), easier to install, and more flexible. However, for large, unshaded arrays where cost is a primary concern, string inverters can be more economical. We'll recommend the best option based on your specific site conditions and goals.

Where can I buy solar equipment at wholesale prices?

Several reputable online wholesalers cater to DIY solar installers and small contractors, offering prices significantly below retail. Top options include Signature Solar (excellent customer service, comprehensive inventory), SanTan Solar (Arizona-based, good prices, educational resources), shopsolarkits.com (pre-configured kits and individual components), Solar Wholesale (verified buyer program for serious DIYers), and GoGreenSolar (kits and components with good support). Most wholesalers require business credentials (contractor license or business registration) or proof of serious intent for their best pricing. Some offer DIY-specific programs where you can access wholesale pricing by demonstrating you're working on your own property with proper permits. Pricing varies but wholesalers typically offer 20-40% savings compared to retail or going through full-service installers. When shopping, compare total costs including shipping (panels are heavy and expensive to ship), not just unit prices. Also verify that equipment meets local code requirements and comes with proper certifications. Building relationships with wholesalers by starting with smaller purchases can lead to better pricing on larger orders. We can provide detailed equipment lists that you can use to get quotes from multiple suppliers.

Do I need to buy all equipment from the same supplier?

No, you can absolutely mix and match suppliers to get the best deals on different components. Many DIYers buy panels from one supplier, inverters from another, and mounting hardware from a third to optimize pricing. However, there are some advantages to buying complete systems from one supplier: simplified ordering and shipping coordination, potential bundle discounts, single point of contact for questions, and reduced risk of component incompatibilities. If you do source from multiple suppliers, make sure all components are compatible - particularly panels and inverters/microinverters, which must match voltage and power specifications. Your solar design will specify exact equipment or compatible alternatives, making it easier to shop around. For example, if the design calls for 400W panels, any quality 400W panel with similar specifications will work. Some items like microinverters require specific panel compatibility, so check manufacturer documentation. Also consider shipping logistics - panels are heavy and expensive to ship, so local pickup can save money if you have suppliers nearby. Mounting hardware is often cheaper from specialized racking suppliers than from solar wholesalers. We provide complete equipment lists with specifications so you can intelligently compare options across suppliers.

What's the difference between budget and premium solar panels?

The main differences between budget and premium solar panels are efficiency, warranty terms, manufacturing quality, and long-term reliability. Premium panels (like REC Alpha, Panasonic, or high-end Q CELLS) typically offer higher efficiency (21-23%), meaning more power per square foot - important if you have limited roof space. They often have better temperature coefficients (they perform better in heat), superior low-light performance, and more robust construction with better weather resistance. Premium manufacturers typically offer 25-year product warranties vs. 10-15 years for budget options. Budget panels (typically from lesser-known Chinese manufacturers) still work fine and have similar 25-year performance warranties, but may have slightly lower efficiency (19-20%), shorter product warranties, and potentially less consistent quality control. For most installations with adequate roof space, mid-tier panels offer the best value - good quality and efficiency without premium pricing. The difference in production between budget and premium panels is often only 10-15%, while the price difference might be 30-50%. Your payback period might actually be longer with premium panels. We help you calculate the real-world cost-benefit based on your specific situation. All tier-1 panels should last 30+ years regardless of price tier.

Can I use used or refurbished solar equipment?

While used solar panels and equipment can offer significant savings, there are important considerations. Used panels from reputable sources (utility-scale project takedowns, building demolitions, or grade-B factory seconds) can work well and cost 30-50% less than new panels. However, they come with risks: unknown performance degradation, potentially voided warranties, possible hidden damage (microcracks), and uncertain remaining lifespan. If buying used panels, test them individually before installation if possible, buy from sources that provide performance testing, avoid panels older than 5 years if possible, and understand you likely have no warranty. Used panels make most sense for off-grid systems, ground mounts, or experimental projects where risk is acceptable. For grid-tied systems that need to last 25+ years and pass inspection, we generally recommend new equipment. Refurbished inverters carry similar risks and typically aren't worth the savings given their critical role and limited lifespan anyway. The one exception: buying from reputables sellers who test and certify used equipment and offer limited warranties. Some used equipment can be great value, but factor in the risks. For most DIYers investing significant time in installation, the incremental cost of new equipment provides peace of mind and long-term reliability worth paying for.

What additional hardware and supplies will I need?

Beyond the main components (panels, inverters, mounting racks), you'll need various additional hardware and supplies. Electrical components include AC and DC disconnects (required by code), junction boxes, conduit and fittings for wire protection, copper wire (appropriately sized for your system), grounding equipment (rods, clamps, wire), and appropriate circuit breakers. Mounting hardware beyond basic racking includes appropriate lag bolts or mounting screws for your roof type, flashing to weatherproof roof penetrations, sealant rated for outdoor/UV exposure, L-foot or other roof attachments specific to your roof type. Tools and supplies include wire strippers, crimpers, and MC4 connectors for panel wiring, torque wrench for proper bolt tightening, multimeter for testing, and safety equipment including fall protection for roof work. Some items like weatherproofing boots, spare fuses, and labels are easy to overlook but required by code. Your permit package will specify all required disconnects and safety equipment. We recommend creating a detailed checklist from your plans before ordering. Many wholesalers offer 'balance of system' kits that include most small parts and hardware, which can be more convenient than sourcing everything separately. Budget an extra 10-15% beyond major components for all the additional supplies and hardware.

How do I verify solar equipment certifications and quality?

Always verify that solar equipment has proper certifications before purchasing. For panels sold in the U.S., look for UL 1703 certification (safety standard for flat-plate PV modules), IEC 61215 or 61730 certifications (international quality and safety standards), and verification that the manufacturer is on the California Energy Commission's approved list. For inverters, check for UL 1741 certification and, increasingly important, UL 1741-SA for advanced grid support functions required by many utilities. Equipment should also meet local code requirements - your AHJ (Authority Having Jurisdiction) may have specific requirements. Be wary of deeply discounted panels without proper certifications - they may not pass inspection. You can verify certifications by checking the product datasheet (usually available on manufacturer websites), looking for certification labels on the physical product, or checking databases like the CEC's List of Eligible PV Modules. For quality verification beyond certifications, research manufacturer reputation through solar forums like r/solar, check Bloomberg Tier 1 lists (updated quarterly), and verify the warranty terms and manufacturer's financial stability. Established manufacturers with long track records and strong financials are more likely to honor 25-year warranties. When in doubt, stick with well-known brands specified in professional solar designs.

Should I add battery storage to my solar system?

Whether to add battery storage depends on your goals, budget, and local utility policies. Batteries make most sense if you: experience frequent power outages and need backup power, have time-of-use electricity rates where you can save by storing solar power for evening use, want energy independence and the ability to go off-grid, or live in an area with poor net metering policies. However, batteries add $10,000-$20,000 to system costs for typical home backup, have limited lifespans (10-15 years) before requiring replacement, and don't always provide financial payback if you have good net metering. Many homeowners start with a grid-tied system without batteries and add them later if needed, though this can cost more than designing for batteries initially. If backup power is your main goal, compare batteries to a standby generator - generators cost less upfront but require fuel and maintenance. We can provide designs with or without batteries and help you analyze the costs and benefits for your specific situation. Battery prices are dropping and technology improving, making them increasingly attractive.

What size battery backup system do I need?

Battery system sizing depends on what you want to power during outages and for how long. Most homeowners choose between two approaches: whole-home backup or critical loads backup. Whole-home backup requires larger battery banks (20-40 kWh or more) to run everything including AC, heating, electric appliances, and provides 1-2 days of power without solar input. This typically requires multiple batteries like 2-3 Tesla Powerwalls or equivalent. Critical loads backup powers only essential circuits - refrigerator, some lights, internet, and select outlets - requiring smaller systems (10-15 kWh) that cost less and can last longer during outages. Most batteries can recharge from solar during the day, extending backup duration indefinitely if your solar production exceeds critical load consumption. To size properly, identify which circuits you want backed up, estimate their daily energy consumption in kWh, and decide how many days of autonomy you want. Our designs include load calculations and battery sizing recommendations. Most people overestimate their backup needs - a well-planned 13.5 kWh system (one Powerwall) can power critical loads for days. We help right-size your system to balance capability and cost.

Tier-1 Solar Equipment at
Competitive Prices

String Inverters

Best for unshaded roofs, single array, lowest cost

Microinverters

Best for complex roofs, shading, panel-level monitoring

String + Optimizers

Best For: Residential and commercial

$$ Mid-Premium

Microinverters

Enphase

IQ8 Series

Power Range

IQ8M (330W), IQ8+ (384W), IQ8A (480W)

Efficiency

97.0% - 97.5%

Warranty

25 years

Type

Microinverter

Best For: Complex roofs, shading, maximum monitoring

$$ Premium

APsystems

DS3

Filter by Manufacturer:

Type	Example	Warranty	Monitoring	Best For	Cost
String	SolarEdge	12yr	Panel-level	Most installs	$$
String	SMA/Fronius	10yr	String-level	Simple roofs	$$
Micro	Enphase IQ8	25yr	Panel-level	Complex/shade	$$
Micro	APsystems	15yr	Panel-level	Budget micro	$$

Efficiency

96% round-trip

Best For: Backup-focused, Generac ecosystem

$$ Mid-Range ($10,000-$17,000)

Battery Comparison

Filter by Manufacturer:

Model	Capacity	Power	Warranty	Efficiency	Best For
Tesla Powerwall 3	13.5 kWh usable	11.5 kW continuous (on-grid), 10 kW (off-grid)	10 years	97.5% round-trip	Whole-home backup, Tesla ecosystem
Enphase IQ Battery 5P	5.0 kWh per unit (modular)	3.84 kW continuous, 7.68 kW peak (per unit)	15 years	89% round-trip	Enphase systems, modular expansion
LG Energy Solution RESU	RESU10: 9.8 kWh, RESU16: 16 kWh	5 kW continuous, 7 kW peak	10 years	95% round-trip	DC-coupled systems, SolarEdge
Generac PWRcell	Modular 9-18 kWh (3kWh modules)	4.5-9 kW continuous	10 years	96% round-trip	Backup-focused, Generac ecosystem

Showing 4 of 4 items

Battery Sizing Guide

Essential loads only (8-12 hrs)

10-13 kWh

Partial home (12-24 hrs)

🏠

Composition Shingle

IronRidge, Unirac, Quick Mount

🏛️

Tile Roof

IronRidge with tile hooks/replacements

🏗️

Metal Standing Seam

S-5! clamps (no penetrations)

🏭

Metal Corrugated

S-5! or IronRidge with metal roof attachments

How to Choose Equipment

Make informed decisions based on your specific needs

☀️ Panel Selection

Efficiency: Higher efficiency = fewer panels needed
Temperature Coefficient: Important in hot climates
Warranty: 25-year performance minimum
Aesthetics: All-black vs. silver frames
Budget: Balance performance and cost

⚡ Inverter Selection

Shading: Shaded roofs benefit from micros or optimizers
Roof Complexity: Multiple orientations favor micros
Monitoring: Panel-level vs. string-level
Budget: String inverters generally most economical
Expansion: Consider future expansion plans

🔋 Battery Selection

Backup Needs: Essential loads vs. whole home
Budget: Capacity drives cost
Solar System: Some batteries integrate better with specific inverters
Scalability: Can you add more capacity later?
Warranty: Longer warranty = better value

Warranties & Guarantees

Standard Warranties

✓
Solar Panels
25-year performance (80-90% output), 12-20 year product
✓
Inverters
10-25 years (varies by manufacturer)
✓
Batteries
10-15 years
✓
Mounting
10-25 years
✓
Workmanship
Depends on installer (DIY = your responsibility)

What We Provide

✓
Equipment Specification Verification
Ensure compatibility and compliance
✓
Warranty Registration Assistance
Help you register all warranties properly
✓
Manufacturer Contact Information
Direct access to support resources
✓
RMA Support
Assistance with returns if needed

Pricing & Savings

Equipment Cost Breakdown (Typical 8kW System)

Panels (20-24 panels)$4,000 - $6,000

Inverter (string or micros)$1,500 - $5,000

Mounting System$1,000 - $1,500

Balance of System$800 - $1,200

Total Equipment Cost$7,300 - $12,200

Our Pricing

✓

15-30% Below Retail

Industry relationships = better pricing

✓

Transparent Pricing

No hidden markups or fees

✓

Volume Discounts Available

Larger systems get better pricing

✓

Price Matching

On equivalent equipment

Frequently Asked Questions About Solar Equipment

Get expert answers about solar panels, inverters, battery storage, and equipment sourcing.

View All FAQs →

Ready to Source Your Equipment?

Get a custom equipment quote based on your system design

Get Equipment Quote Schedule Consultation

Tier-1 Solar Equipment atCompetitive Prices

Solar Panels

REC

Q CELLS

Jinko

Canadian Solar

Longi

Inverters

String Inverters

Microinverters

String + Optimizers

String Inverters

SolarEdge

SMA

Fronius

Microinverters

Enphase

APsystems

Power Optimizers

SolarEdge

Tigo

Inverter Type Comparison

Battery Storage Systems

Tesla

Enphase

LG Energy Solution

Generac

Battery Comparison

Battery Sizing Guide

Mounting & Racking Systems

IronRidge

Unirac

Quick Mount PV

S-5!

Mounting System Selection Guide

How to Choose Equipment

☀️ Panel Selection

⚡ Inverter Selection

🔋 Battery Selection

Warranties & Guarantees

Standard Warranties

What We Provide

Pricing & Savings

Equipment Cost Breakdown (Typical 8kW System)

Our Pricing

Frequently Asked Questions About Solar Equipment

Ready to Source Your Equipment?

Tier-1 Solar Equipment at
Competitive Prices