SolarEdge vs Enphase Calculator

Enter your system size, shading, and roof complexity — get a side-by-side comparison of cost, shade performance, 25-year production difference, and a recommendation for your situation.

Your solar system

System size?

Panel count?

panels

Shading on roof?

Roof complexity?

Additional factors

Battery storage planned?

No — solar only

Monitoring importance (1-5)?

SolarEdge vs Enphase — side-by-side

SolarEdge Recommended

SolarEdge wins — simple unshaded single-plane roof, cost advantage of $800 with same production

Metric	SolarEdge REC	Enphase
Technology	String inverter + 1 optimizer/panel	1 microinverter/panel (AC output)
Cost/watt (8 kW system)	$0.15–$0.25/W	$0.25–$0.35/W
Est. system add-on cost	$1,200–$2,000	$2,000–$2,800
Cost premium (Enphase vs SE)	—	+$800 (+50%)
Shade performance (none)	100% of rated	100% of rated
25yr production diff (shade impact)	11,680 kWh/yr	11,680 kWh/yr (+0/yr)
Failure mode	Single inverter failure = full system down	Single microinverter failure = 1 panel down only
Monitoring	SolarEdge mySolarEdge app — panel-level data via optimizers	Enphase Enlighten — detailed panel-level + battery dashboard
Battery compatibility	SolarEdge Home Battery (LFP, 9.7 kWh)	Enphase IQ Battery 5P — native integration
Battery note	DC-coupled, requires SolarEdge inverter	AC-coupled, no additional inverter if Enphase solar
Warranty	12-year inverter, 25-year optimizer	25-year microinverter warranty
Expansion ease	Moderate — add panels to existing string with optimizer	Easy — add panels/microinverters independently
Main advantage	Lower cost/W, best for simple unshaded roofs	Best shade performance, distributed reliability

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How to Use This Calculator

Enter your system size and roof conditions

Start with your system size in kW and panel count. Then select the most important differentiator: shading. This is the single biggest factor in the SolarEdge vs Enphase decision. If your roof has no shading and faces south on a single plane, SolarEdge with optimizers is typically the right choice — it costs $0.10–$0.15/W less. If you have any partial shading from trees, chimneys, or neighboring buildings, Enphase microinverters eliminate inter-panel losses entirely.

Configure roof complexity and battery plans

Roof complexity matters for string sizing. A complex multi-plane roof with panels facing east, west, and south creates mismatched strings that are difficult to optimize with a string inverter. Enphase's fully distributed approach handles any roof configuration without compromise — each panel operates at its individual maximum power point. Toggle battery plans if you're considering storage: both brands offer batteries, but Enphase is natively integrated if you already have Enphase solar.

Set monitoring importance

Both systems provide panel-level monitoring — SolarEdge via the optimizer data link, Enphase via per-panel microinverter telemetry. Enphase Enlighten is widely considered the better app. If monitoring is critical to you (e.g., you want detailed fault alerts, per-panel production history, and battery integration in one dashboard), the monitoring slider shifts the recommendation toward Enphase.

The Formula

System Cost Range = kW × 1000W × Cost/W (min–max) Shade Performance = System Output ÷ Full-Sun Output × 100% Annual kWh = System kW × 5 PSH × 365 × 0.80 system eff. × Shade Factor 25yr Production Diff = Annual kWh Diff × 25 years Weighted Score = Cost(2x) + Shade(2x) + Reliability(1x) + Monitoring(variable) + Battery(variable) + Roof(variable)

The cost/W ranges represent the inverter/optimizer/microinverter component of the system — not the full solar system cost (which includes panels, racking, and installation). SolarEdge adds $0.15–$0.25/W; Enphase adds $0.25–$0.35/W. The shade performance figures represent real-world production relative to full-sun conditions: Enphase microinverters limit shading loss to the affected panel; SolarEdge optimizers limit it to that panel rather than the full string, but panel-level MPPT isn't as granular as per-panel microinverter MPPT.

Example

Tom — 10 kW system on a complex multi-plane roof

Tom is installing 25 panels on a home with three roof planes (south, east, west). The east and west faces receive morning and afternoon sun respectively. Partial tree shading affects the west face in summer.

System size10 kW (25 panels)

ShadingPartial (west face)

Roof complexityMulti-plane (S/E/W)

Battery plansNo

Comparison result

SolarEdge add-on cost$1,500–$2,500

Enphase add-on cost$2,500–$3,500

Cost premium for Enphase~$1,000 more

Shade performance — SolarEdge92% of rated output

Shade performance — Enphase98% of rated output

Annual production diff+657 kWh/yr with Enphase

25yr production diff+16,425 kWh lifetime

RecommendationEnphase — multi-plane + partial shade

Tom's multi-plane partially shaded roof is exactly where Enphase shines. The $1,000 cost premium pays back quickly: 657 extra kWh/year at $0.15/kWh is $98.55/year — payback on the premium in under 11 years, then 14+ years of additional benefit. Plus, individual panel failure only takes down one microinverter — a string inverter failure on a complex roof would need a service call to restore all panels.

FAQ

Is SolarEdge or Enphase better for a typical home? ▼

For a simple south-facing roof with no shading, SolarEdge is usually the better choice — it costs $0.10–$0.15/W less with nearly identical performance. For any shading or multi-plane roof, Enphase wins on production and flexibility. A rough rule of thumb: if a solar installer shows you a shade analysis and any panel has more than 10% shading loss, choose Enphase. If your roof is clean and simple, save the money with SolarEdge.

Do I need power optimizers with SolarEdge? ▼

Yes — SolarEdge systems require a SolarEdge power optimizer on each panel. This is not optional; the optimizers are what allow panel-level monitoring and MPPT, and they're required for the SolarEdge inverter to function properly. The optimizer adds $0.05–$0.12/W to the cost, which is what makes SolarEdge more expensive than a traditional string inverter but less expensive than Enphase microinverters per panel. You cannot use SolarEdge optimizers with a different brand of inverter.

What happens if a SolarEdge inverter fails? ▼

If the SolarEdge string inverter fails, your entire system stops producing. This is the key reliability disadvantage vs. Enphase microinverters. SolarEdge inverters have a 12-year warranty (extendable to 20 or 25 years for additional cost). Failure rates on modern SolarEdge inverters are low — industry average failure rate is under 1% per year — but when failure does occur, it takes down the whole system until a replacement arrives, which can take days. Enphase microinverter failure only takes down 1 panel (1/20th to 1/25th of the system).

Can SolarEdge and Enphase systems be expanded with more panels? ▼

Both can be expanded, but Enphase is easier. Adding Enphase panels just requires adding more microinverters — each panel is fully independent. With SolarEdge, you need to check your inverter's capacity and ensure the new panels can be added to an existing string or a new string within the inverter's input count. If you're adding panels to a different roof plane with different orientation, SolarEdge string design gets complicated. Enphase handles mixed orientations trivially since each panel has its own MPPT.

Which is better for battery storage — SolarEdge or Enphase? ▼

Both brands offer good battery solutions. Enphase IQ Battery 5P integrates natively with Enphase solar — no additional inverter required, seamless monitoring in Enlighten, and modular expansion. SolarEdge Home Battery (9.7 kWh LFP) is DC-coupled to the SolarEdge inverter, which is more efficient (DC-coupled avoids one AC→DC conversion). If you're building a new system from scratch and want battery storage, SolarEdge's DC-coupling is slightly more efficient; if you have existing Enphase solar, IQ Battery is the clear winner due to native integration.

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