- What panel and inverter brands are included?
- Are the components new, and are they standard residential products?
- Is the inverter string-style or microinverter-based?
If you’re shopping for rooftop solar, the quote is only the starting point. Two proposals can look similar at a glance yet differ in equipment quality, financing structure, warranty coverage, and who is responsible for permits or roof work.
Knowing what to compare can help you make a more informed decision.
→ Energy Revolution System — free, takes about 60 seconds.
Start with the system basics
Begin by checking whether each quote clearly explains the size of the system and the equipment being offered. A useful proposal should tell you the panel brand, inverter type, system size in kilowatts, and how the system is expected to be installed on your roof.
It also helps to confirm whether the quote is based on your actual home or just a rough estimate. A serious proposal should reflect your roof orientation, shading, and household electricity use.
If it does not, you may be comparing a real design with a generic sales pitch.
Ask these questions about the equipment
We go deeper on this in what to look at first — worth a read before you decide anything.
- What panel and inverter brands are included?
- Are the components new, and are they standard residential products?
- Is the inverter string-style or microinverter-based?
- What warranties apply to the panels, inverter, and workmanship?
Look beyond the headline price
→ See what you could be approved for — free, takes about 60 seconds.
The number at the top of a solar quote can be misleading if it leaves out important costs. Some proposals bundle everything neatly, while others assume that permits, electrical upgrades, or roof modifications will be handled separately.
Before comparing offers, look for a clear list of what is included and what is not.
Watch for line items that may affect the final project cost:
- Permit fees and inspection costs
- Electrical panel upgrades
- Roof repair, replacement, or reinforcement
- Trenching or other wiring work for ground equipment
If one company includes these items and another does not, the cheaper quote may not be cheaper in the end. Ask each installer to explain any assumptions built into the price.
Sources & further reading
This article is for general information only and is not professional financial, legal, or medical advice.
Tom Bishop — Home & Safety Editor
Tom covers home security, improvement, and energy topics, comparing options on cost, reliability, and real-world performance so homeowners can decide with confidence.
Updated August 2026