Frequently Asked Questions

We size your system using 12 months of kWh usage, roof space, shading, and goals (bill offset, backup, EV). Your proposal includes a production model and right-sized options.

We use top-tier, warrantied equipment selected for reliability and support. Exact makes and models are listed in your proposal with datasheets.

No, mounts are flashed and sealed to manufacturer specs. If your roof is near end-of-life, we'll coordinate re-roofing before install to protect warranties.

A few weeks to a few months depending on permitting and utility review. The on-site installation itself is typically 1–2 days for a standard roof system.

Lunex manages design, permitting, utility paperwork, and inspections end-to-end. We'll keep you updated at each milestone.

Someone 18+ should be available for access to the electrical panel and any interior equipment locations, plus a quick walkthrough at completion.

Cash purchase and $0-down loans with various terms. We'll show estimated payments alongside your production and savings projections.

Programs vary by location and utility. Your proposal outlines currently available options and eligibility. Please consult a tax professional for personal advice.

Buying typically maximizes long-term savings and home value. Leases/PPAs can reduce upfront costs and shift some responsibilities. The best choice depends on your goals.

Excess solar flows to the grid and earns credits per your utility's policy, which offset usage when production is lower.

PTO is the utility's final approval to energize your system after inspections. We submit the paperwork and notify you when it's granted.

Most customers still see small fixed charges or seasonal usage. We model an annual offset that fits your roof, budget, and utility rules.

You'll get app and web access to real-time and historical production. We can enable alerts so our team is notified if output trends change.

Panels and inverters include manufacturer warranties, and Lunex provides a workmanship warranty. Coverage terms appear in your contract and proposal.

Solar is low-maintenance. Rain usually keeps panels clean; occasional rinsing may help if buildup occurs. We're available for service if needed.

We start with a detailed load audit (daily kWh and surge loads), then size PV, battery, and inverter capacity to meet your autonomy and growth goals.

Most sites target 2–4 days, adjusted for climate and critical loads. We model seasonal production to right-size storage without overspending.

Yes, modular designs allow additional PV or batteries. We plan for expandability in racking, combiner capacity, and inverter selection.

A generator adds resilience during long storms or peak seasonal loads. We configure auto-start to protect battery health and reduce fuel use.

Lithium (LFP) batteries provide more usable capacity, charge faster, and last longer, but they cost more upfront. Lead-acid batteries are less expensive at first but require more maintenance and have a shorter lifespan.

We align storage with daily kWh, surge loads, days of autonomy, and generator strategy, balancing comfort, resilience, and budget.

AC-coupled systems are flexible for retrofits; DC-coupled can be more efficient for charging batteries. We'll recommend based on loads and equipment.

We look at surge ratings, parallel/stacking capability, and generator integration. Pure sine wave inverters are standard for sensitive electronics.

Charge controllers regulate the flow of power from your solar panels to your batteries. MPPT (Maximum Power Point Tracking) controllers adjust voltage and current to maximize energy harvest and work well with higher-voltage arrays. PWM (Pulse Width Modulation) controllers are a simpler, lower-cost option that work best for very small off-grid systems. For most modern setups, MPPT is preferred as your system size grows.

Many areas still require electrical and building permits, even for off-grid setups. We design to meet all applicable codes and coordinate with your local Authority Having Jurisdiction (AHJ), such as your city or county permitting office.

Ground-mounts simplify maintenance and snow clearing; roof-mounts can reduce cost and trenching. Site specifics and winter access drive the choice.

We adhere to electrical and structural code, use labeled disconnects, and design for safe service access. Commissioning includes system tests and owner training.

Yes, most inverters and battery systems support remote dashboards and alerts. We can enable notifications for low SOC, generator runtime, and fault events.

We recommend critical spares like fuses, breakers, combiner lids, and a backup communication dongle, especially for remote sites or harsh climates.

Open a ticket and we'll triage via monitoring data. If needed, a technician visits with the right parts. Warranty claims are coordinated through Lunex.