Semper Solaris

4.6 (513 reviews)

| Hayward, CA | Solar

Semper Solaris is a Hayward solar and roofing contractor installing and servicing solar panel systems for residences.

At a Glance

Category: Solar
Location: Hayward, CA
Rating: 4.6/5 (513 reviews)
Phone: +16502032589
Services: Roofing Contractor, Service, Point Of Interest

About Semper Solaris

Semper Solaris is a solar contractor based in Hayward, CA. They hold a 4.6/5 star rating from 513 Google reviews. Semper Solaris has been operating from their Hayward location at 2505 Amaral Court.

This contractor specializes in solar panel installation for residential properties. Their services include solar energy system design, installation, and associated electrical work. They also have a subcategory listing as a roofing contractor, indicating potential services related to roof preparation for solar arrays.

When evaluating Semper Solaris for a solar project, consider asking about their specific experience with your type of roof and home electrical system. Inquire about their process for system design, permitting, and interconnection with the utility. Review customer feedback regarding communication, project timelines, and post-installation support to understand their project management approach.

Services

Roofing Contractor

Service

Point Of Interest

Establishment

Hours

Friday 7:00-0:00 Monday 7:00-0:00 Sunday 9:00-0:00 Tuesday 7:00-0:00 Saturday 7:00-0:00 Thursday 7:00-0:00 Wednesday 7:00-0:00

Business information verified via Google Business Profile. Last updated: 2026.

Last verified: May 2026

Contact

2505 Amaral Court

Hayward, CA 94544

(650) 203-2589

Visit Website

Map

How to evaluate Semper Solaris

Before hiring Semper Solaris for solar work in Hayward, take a few minutes to verify their qualifications and confirm they are the right fit for your project. The right solar for one homeowner may not be the right fit for another, so do the diligence up front.

Verify licensing and insurance

Confirm that Semper Solaris carries an active CA contractor license appropriate for the scope of work, plus general liability and workers’ compensation coverage. Ask for the license number and look it up on the state board website. A solar that hesitates to share these details is a red flag, regardless of how favorable their reviews look.

Get a written, itemized quote

Request a detailed written estimate that lists materials, labor, permit fees, timeline, and payment schedule. Itemized quotes make it possible to compare Semper Solaris side-by-side with other solar options in Hayward, and they protect you from scope creep once the work begins.

Ask about project experience

Ask Semper Solaris how many projects similar to yours they have completed in the last 12 months, whether they will be the primary on-site team or are subcontracting, and how they handle change orders. Request two or three local customer references and actually call them — reviews on Google are useful but a five-minute conversation reveals much more about how a solar actually shows up.

Frequently Asked Questions

What services does Semper Solaris offer in Hayward, CA?

Semper Solaris offers high-efficiency solar panel installations, battery storage solutions (including Tesla Powerwall and Enphase batteries), expert roofing services, and HVAC solutions to homeowners in Hayward, CA and the wider Bay Area.

What are the benefits of adding battery storage to a solar panel system from Semper Solaris?

Adding battery storage like a Tesla Powerwall or Enphase battery allows homeowners to store excess solar energy, reducing reliance on the grid, providing backup power during outages, and maximizing solar savings by protecting against spikes in Time-of-Use rates.

Does Semper Solaris offer any special warranties for their roofing services?

Yes, as an Owens Corning Platinum Preferred Contractor, Semper Solaris offers a 50-year warranty on their roofing services, ensuring long-lasting performance and peace of mind for homeowners.

Is Semper Solaris a veteran-owned company?

Yes, Semper Solaris is a veteran-owned team founded by a fellow Marine. They bring precision and integrity to every project and actively support veterans and first responders through hiring and discounts.