Solar Proposal Review
Received a Solar Proposal From Tesla Powerwall? Get a Local Second Opinion.
Many homeowners compare multiple solar proposals before signing. Robbins Energy provides a free, no-pressure review of your system design, equipment, pricing, and expected production — so you can make a confident decision.
Licensed Solar Contractor · License #1063682 · Serving Central California
About Tesla Powerwall Proposals
Tesla Powerwall is one of the most recognized home battery brands in California. Proposals specifying Powerwall 3 (the current generation) include an integrated solar inverter, eliminating the need for a separate solar inverter. Proposals specifying Powerwall 2 (older generation) require a separate solar inverter. Robbins Energy installs and services Tesla Powerwall systems and can review any proposal that includes Powerwall storage.
Key Items to Review in a Tesla Powerwall Proposal
- Confirm whether the proposal specifies Powerwall 3 (integrated inverter) or Powerwall 2 (requires separate inverter).
- Review the number of Powerwalls — a single 13.5 kWh Powerwall typically covers essential loads for 8–12 hours.
- Check whether the proposal includes a Tesla Gateway for grid outage detection and automatic backup.
- Confirm the 10-year warranty and whether it covers both capacity and throughput.
- Ask whether the installer is a Tesla Certified Installer — required for warranty support.
What Robbins Energy Reviews in Your Proposal
A solar proposal contains a lot of information. We help you understand what matters — and what to ask before signing.
System Size (kW)
Is the system sized correctly for your actual usage?
Estimated Annual Production
Do the production estimates match your roof's real sun exposure?
Solar Panel Manufacturer
What brand and efficiency rating are the panels?
Inverter Technology
String inverter, microinverters, or power optimizers — each has trade-offs.
Battery Options
Is battery storage included? What capacity and backup duration?
Warranty Coverage
Panel, inverter, and workmanship warranties vary significantly.
Monitoring Features
How will you track production and catch problems early?
Price Per Watt
The most useful apples-to-apples comparison across proposals.
Financing Terms
Cash, loan, or lease — each has different long-term implications.
Why a Second Opinion Makes Sense
Confirm System Sizing
An undersized system won't offset your bill. An oversized system costs more than necessary. Proper sizing depends on your actual 12-month usage, roof orientation, and shading.
Understand Production Estimates
Production estimates vary based on assumptions. We review the methodology and compare it against local irradiance data for your specific address.
Compare Equipment Options
Solar panels, inverters, and batteries vary in performance, warranty terms, and suitability for Central Valley conditions. We help you understand the equipment in your proposal and what options are available.
Review Long-Term Ownership Costs
Warranties, monitoring, and service availability matter over a 25-year system life. We help you understand what happens if something needs repair.
Upload Your Tesla Powerwall Proposal
Send us your proposal and we will review the system design, equipment, and pricing at no charge. No obligation.
Equipment We Install, Service, and Compare
We work with all major solar and battery brands. When reviewing your proposal, we can compare the proposed equipment against alternatives we install and service.
Inverters
Batteries
NEM 2.0 vs NEM 3.0 — What It Means for Your Proposal
NEM 2.0
Systems interconnected before April 15, 2023 are grandfathered on NEM 2.0 for 20 years. If you have an existing system, your export rate is protected.
NEM 3.0
New systems interconnected after April 15, 2023 are on NEM 3.0. Export rates are lower, which means battery storage has a stronger financial case.
Battery Storage Under NEM 3.0
With NEM 3.0, storing solar energy and using it during peak evening hours (4–9 PM) is more valuable than exporting it. A properly sized battery can significantly improve your system's economics.
Tesla Powerwall Solar Proposal — Frequently Asked Questions
Is Tesla Powerwall a good battery for Central Valley homes?
Tesla Powerwall 3 is a strong choice for most Central Valley homes. The integrated inverter simplifies installation and reduces potential failure points. For homes with high summer cooling loads in Fresno, Clovis, or Visalia, a single Powerwall may not cover overnight AC usage — Robbins Energy can help you size the right number of units for your consumption.
What is the difference between Powerwall 2 and Powerwall 3?
Powerwall 3 includes a built-in solar inverter, so no separate inverter is needed. Powerwall 2 requires a separate solar inverter (such as SolarEdge or Enphase). Powerwall 3 also has higher continuous power output (11.5 kW vs 5 kW for Powerwall 2). If a proposal specifies Powerwall 2, confirm the separate inverter is included and priced.
Does Robbins Energy install Tesla Powerwall?
Yes. Robbins Energy installs Tesla Powerwall systems throughout Fresno County, Tulare County, Kings County, and Madera County. We can also service existing Powerwall systems and add additional units to existing installations.
How many Powerwalls do I need for my Fresno home?
Most Fresno-area homes use 30–50 kWh per day in summer. A single Powerwall 3 (13.5 kWh usable) covers essential loads — refrigerator, lights, phone charging, and some outlets — for 8–12 hours. For whole-home backup including AC, most homes need 2–3 units. Robbins Energy can review your utility bills and size the system correctly.
We Service Existing Solar Systems — Regardless of Installer
If you already have solar and need service, we can help — even if we did not install your system.
Serving Central California
Get Your Free Solar Proposal Review
Bring us your proposal — or upload it below. We will review the system design, equipment, pricing, and production estimates at no charge. No pressure, no obligation.
Related Services
Compare Proposals