Jinwu

Jinwu is an independent solar advisory practice based in California that helps customers compare solar options and determine the appropriate system size. The practice reviews twelve months of a customer's electricity usage, rate schedule, and roof characteristics such as orientation, shading, and electrical panel capacity. Jinwu does not perform installations itself; instead, it connects customers with CSLB-licensed contractors who handle the installation and warranty. The founder is Joshua DiMercurio, and the business serves Northern and Southern California.

To get started, a customer can book a thirty-minute, no-charge call with no preparation required. The process begins by reviewing the customer's electricity bill, rate schedule, and roof condition rather than guessing from square footage. Once the system is sized, the customer meets the contractor before signing and contracts directly with them for the installation.

The service is designed for homeowners in Northern and Southern California who want a right-sized system based on their actual usage and roof characteristics. It also works with builders and developers on multi-unit, ADU, and new construction projects. The practice avoids oversizing systems, even though a bigger system often means a bigger commission for the installer.

Jinwu is not a licensed contractor and does not perform, permit, or warrant installation work. All installation is performed by CSLB-licensed contractors who contract directly with the customer and carry the workmanship warranty. Equipment warranties are held by the manufacturers, while Jinwu remains available afterward for questions, service calls, and warranty claims.

The practice evaluates twelve months of usage, the rate schedule, and when power is actually used to size the system correctly. They also check orientation, shading, condition, and what the electrical panel can carry to ensure the design fits the building. This data-driven approach prevents the common mistake of sizing based on last year's bill alone.

The founder, Joshua DiMercurio, holds California CSLB Home Improvement Salesperson Registration #146583 SP, which is public and verifiable on the state license board. He has worked in home improvement for over ten years and designed solar systems for the last four. John Yeh, an Ambassador of Solar, has spent thirty years in home improvement and focuses on the technical side of efficiency.

The business operates as a small practice with named people rather than a call center, avoiding sales floors, quotas, and summer reps. The person who sells the system is the same person who answers the phone in year seven. This structure ensures consistent communication and accountability throughout the system's life.

For new construction, the practice reviews the plans to size the system to what is coming, including future additions like an electric car, heat pump, or pool. Sizing to last year's bill alone often results in an under-built system that cannot handle future energy demands. They show the arithmetic to demonstrate why right-sizing matters.

The practice aims to stay the point of contact after the install, bringing the responsible party to resolve questions in year seven or service calls. They remain reachable for warranty claims, ensuring the customer does not have to navigate the process alone. This long-term commitment is a core part of their service model.

The practice explicitly states it avoids oversizing systems, even though a bigger system often means a bigger commission for the installer. They prefer to lose a deal rather than oversize one, focusing on efficiency and what actually works on a particular building. This approach ensures the system is right-sized to what the customer actually uses.

The practice works with builders and developers on multi-unit, ADU, and new construction projects. They also offer a specific page for builders to talk to them about these projects. The service is tailored to both individual homeowners and larger development teams.

The practice emphasizes that solar can be sold well but usually isn't, with one product and one price often pushed before the customer reads anything. They start from the customer's bill and roof to tell them what they actually find. This transparency is a key part of their advisory approach.

The practice uses the name Jinwu, referencing the golden three-legged bird that carries the sun across the sky every morning. The name is chosen because it is a claim about carrying and doing it again tomorrow, not just a claim about the sun itself. This symbolism reflects their commitment to consistent, daily service.

You can reach Jinwu by phone at +19258135083.

The official website of Jinwu is jinwuenergy.com.