Harnessing the sun from the shadows of Appalachia.
🏔 Rocky Broad River · Western NC
Electricity can seriously injure or kill you. This guide is for educational purposes only. All electrical work should be performed by or under the supervision of a licensed electrician. Always follow local codes and pull the required permits.
Before spending a dime, understand these core concepts. A solar + storage system is really just a few components working together.
Photovoltaic panels convert sunlight into DC electricity. More panels = more power. Roof mount or ground mount — both work. All-black panels look best on a visible roof. Skip bifacial panels unless you have a ground mount or tilt rack where the back of the panel gets sun exposure.
The brain of the system. Converts DC solar power to AC power your home uses. A hybrid inverter also manages grid, battery, and solar sources simultaneously — acting as an intersection of power sources rather than a drawbridge.
Stores excess solar energy for use at night or during outages. Lithium Iron Phosphate (LFP) is the gold standard — safe, long-lasting, no maintenance. More batteries = better system performance. Go big or go home.
Hybrid systems stay connected to the grid as a backup source and can export excess power for credits (net metering) on your utility bill. This is what separates a hybrid inverter from an off-grid inverter.
Current transformers measure your home's energy use in real time. They let your inverter intelligently manage power flow — critical for bill savings. On the EG4 GridBoss, CT clamps are built right in.
Required by NEC 690.12 for roof-mounted systems on habitable buildings. Shuts down panel-level DC voltage within 30 seconds so firefighters aren't electrocuted on the roof during an emergency.
Your HVAC, electric water heater, and EV charger likely account for 80–90% of your electric bill. A system that can control those loads will save you the most money. Portable power stations generally cannot do this — hybrid inverters can, especially when paired with a GridBoss's smart circuit ports.
There are four main paths. Choose based on your goals, home size, and budget.
Plug-and-play. Great for camping, RVs, or powering a few devices during outages. Not suitable for reducing your utility bill — no CT clamps, no grid interaction, limited PV input. Top picks: Anker SOLIX F3800, Anker SOLIX F2600, Anker SOLIX F1500, Jackery Explorer 5000 Plus, Jackery Explorer 3000 Pro, Bluetti, OUPES Guardian 6000.
An off-grid inverter like the EG4 12000XP V2 can be connected to the utility grid as a secondary power source — but there's a key difference from hybrid: it's either grid or solar/battery, never both at the same time. Great for backing up a dedicated 100A sub-panel of critical loads. Supports one smart port for load shedding or integrating an existing solar system, also known as “AC coupling.”
The best of all worlds — uses solar, batteries, and the grid simultaneously. Can offset your bill, export power for net metering credits, and provide whole-home backup. Requires permits in most areas. Recommended for most homeowners.
Fully self-sufficient — no utility connection needed. Off-grid inverters can accept the grid as a secondary backup source, but cannot use both grid and solar/battery power simultaneously like a hybrid can. Cannot export back to the grid. Best for cabins, remote land, or grid-independent living. Shorter warranties (5 yr) and generally fewer certifications for inspections.
Top picks: EG4 12000XP V2 (whole-home, 28kW PV, 15kW output) · EG4 6000XP (budget option, 10kW PV, 6kW output, 120/240V)
| Feature | Portable | Partial (Off-Grid Inv.) | Hybrid ⭐ | Off-Grid |
|---|---|---|---|---|
| Reduces utility bill | ❌ | ✅ | ✅ | ✅ |
| Whole-home backup | ❌ (partial) | ⚠️ up to 100A panel | ✅ | ✅ |
| Grid + Solar simultaneously | ❌ | ❌ (one or other) | ✅ | ❌ (one or other) |
| Grid export / net metering | ❌ | ❌ | ✅ | ❌ |
| Permit required? | Usually No | Often Yes | Usually Yes | Sometimes |
| Inverter warranty | 2–5 yr | 5 yr | 10–15 yr | 5 yr |
These bundles are designed for the average American home. You can always expand later — EG4 systems are modular. All products available through Signature Solar or Current Connected.
Visual reference for how a hybrid solar + storage system connects together. Always follow NEC code and local AHJ requirements.
CT clamps are built into the EG4 GridBoss. Smart circuit ports directly control HVAC, water heater, and EV charger — shedding them automatically during outages or programmed time windows.
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These are the most commonly cited NEC violations on DIY solar installs. Know these before your inspector shows up.
Your Authority Having Jurisdiction (local building/electrical department) has the final say. Requirements vary widely by jurisdiction — always contact them before starting work or spending money on equipment.
Every piece of serviceable electrical equipment needs clear working space in front of it. The inspector will measure this — don't skip it.
Also check NEC 110.26(e) for "dedicated space" requirements above equipment — typically the space directly above a panelboard must be kept clear of foreign systems (pipes, ducts, etc.).
If your panels are on a habitable structure, every module must be able to shut down to a safe voltage (≤30V) within 30 seconds of triggering. This protects firefighters.
DC wiring from your panels to the inverter requires metallic conduit once it enters a habitable building (attic counts).
Fire codes for solar and battery storage systems are some of the most jurisdiction-specific requirements you'll encounter. Requirements vary dramatically by local AHJ and adopted fire code edition.
Batteries cannot be installed in habitable spaces. Unfinished basements, utility rooms, and garages are the typical approved locations.
Inspectors will fail an installation for missing labels. This is the most common reason for a failed inspection — and the easiest to fix in advance.
Improper grounding is one of the most dangerous and most commonly cited violations. Your entire system must be properly grounded and bonded.
A step-by-step overview of how a hybrid system installation flows from start to finish.
Calculate your energy needs, choose your equipment (inverter → batteries → panels in that order), and run a solar stringing calculator with your zip code and panel VOC data. A professional system design typically costs around $250 and can save you far more in mistakes. Good designers also produce permit-ready single-line drawings.
Most AHJs require a licensed structural engineer to review and stamp your roof racking plans before issuing a permit. They verify your roof can handle the added load of solar panels and racking hardware. Some AHJs also require an Electrical Engineering stamp on the single-line diagram. Structural stamps typically cost $150–$500 depending on your location and system size. Many solar equipment distributors and permit expediting services can connect you with a stamping engineer.
Submit your stamped drawings, single-line electrical diagram, equipment cut sheets, and site plan to your local AHJ. Permit fees typically range $100–$500. Utility interconnection is a separate process — your utility must approve the system before you connect to the grid or export power. Utility requirements vary greatly: some require additional PV system disconnects, a dedicated PV production meter, a battery disconnect, or a whole-system disconnect beyond what the NEC requires. Interconnection application fees also vary widely, from $150 to over $2,000 depending on the utility. Start the interconnection application early — approval can take weeks to months.
Install racking, mount panels, make MC4 connections. On standing seam metal roofs use S-5 clamps — no roof penetrations needed. On asphalt shingles use flashed J-boxes. Run DC wiring in appropriate conduit down to inverter location. Install Tigo MLPEs if roof-mounted (required for RSD compliance).
Choose your indoor location with proper working clearances per NEC 110.26. Stack the inverter on top of the batteries using EG4 conduit boxes — this simplifies connections and eliminates custom cable runs. Mount the GridBoss near the utility meter if needed. Verify all fire access and spacing requirements before final positioning.
Connect battery bank via paralleling cables. Connect AC output to GridBoss or load panel. Wire smart ports for HVAC, water heater, and EV charger. Install CT clamps at main service conductors (or use the GridBoss's built-in CTs). Plugging in the solar panels is the very last step — make sure all DC disconnects are in the OFF position before making any panel connections. This protects you and your equipment from live DC voltage during the rest of the installation.
Apply all required NEC labels before the inspector arrives. Label all conduit runs, disconnects, breakers, the main panel, and the RSD switch. Missing labels are the #1 cause of failed solar inspections — don't skip this step.
Power up carefully following the manufacturer's sequence. Program inverter settings for your utility connection, battery SOC limits, smart port load-shed schedules, and time-of-use optimization. Monitor via app for the first week to confirm everything is performing as expected.
The inspector checks working clearances, labeling, grounding/bonding, conduit fill, breaker sizing, RSD compliance, fire access pathways, and equipment specs. After passing, contact your utility to request Permission to Operate (PTO) before exporting power or running the system in grid-tied mode. Operating without PTO can result in your utility disconnecting your service.
Rocky Broad Solar's YouTube channel covers every step of installation in detail. These videos are the best companion to this guide.
Real DIY installs, no fluff. Watch before you buy anything.