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String, hybrid or microinverter — which suits your solar setup and what each costs.
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Four moves that separate a smooth job from a nightmare.
Shading degrades string output
String inverter — one shaded panel reduces whole array. Use SolarEdge optimisers or Enphase micro-inverters.
Inverter undersized
Cheaper inverter limits system output. Match inverter capacity to array.
Battery not compatible
Plan battery and inverter together. Hybrid inverter or AC-coupled battery.
Monitoring app fails
Cheap inverters have poor monitoring. SolarEdge and Enphase apps excellent.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and what affects price.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Standard string inverter4kW typical
£800–£1.5k
SolarEdge string + optimisersPer-panel optimization
£1.5k–£2.5k
Enphase micro-inverter systemPer-panel inverter
£2k–£3.5k
Hybrid inverter (with battery support)For battery storage
£1.5k–£3k
Tesla Powerwall inverter integratedIncluded in Powerwall
£1–£1
Annual monitoring subscriptionApp services
£1–£120
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
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Renewable Energy explained
Solar inverter converts DC from panels to AC for the home — critical component. Three main types: string, micro-inverter, hybrid. Expect to pay £800–£3,500 for UK solar inverter depending on type and capacity.
What Does the Work Involve?
Installer matches inverter to panel array size and home electrical setup. Wall-mounted (loft, garage, outside). Connects to consumer unit via meter. Monitoring app pairing. Battery integration if planned. Smart export integration for SEG.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Standard string inverter | 800 | 1,500 | 4kW typical |
| SolarEdge string + optimisers | 1,500 | 2,500 | Per-panel optimization |
| Enphase micro-inverter system | 2,000 | 3,500 | Per-panel inverter |
| Hybrid inverter (with battery support) | 1,500 | 3,000 | For battery storage |
| Tesla Powerwall inverter integrated | 0 | 0 | Included in Powerwall |
| Annual monitoring subscription | 0 | 120 | App services |
| Inverter warranty (premium) | 10 years | 25 years | vs 5 years budget |
How Long Does It Take?
Same install time as panels. Configuration takes longer for premium systems.
DIY or Professional?
MCS-certified installer.
Choosing the Right Tradesperson
MCS-certified with brand experience. SolarEdge specialists for optimisers. Enphase specialists for micro-inverters. Brand choice impacts installer.
UK Regulations
MCS certification. G83/G99 grid connection. Inverters must be approved by DNO (Distribution Network Operator).
Common Problems
- Shading degrades string output: String inverter — one shaded panel reduces whole array. Use SolarEdge optimisers or Enphase micro-inverters.
- Inverter undersized: Cheaper inverter limits system output. Match inverter capacity to array.
- Battery not compatible: Plan battery and inverter together. Hybrid inverter or AC-coupled battery.
- Monitoring app fails: Cheap inverters have poor monitoring. SolarEdge and Enphase apps excellent.
Frequently Asked Questions
String, micro, or hybrid inverter?
String: cheapest, central inverter, shading affects all. Micro (Enphase): per-panel inverter, no shading issue, premium. Hybrid: includes battery support, future-proof.
SolarEdge vs Enphase?
SolarEdge: optimisers + central inverter, cheaper than Enphase. Enphase: pure micro-inverter, most premium, longest warranty.
How long do inverters last?
String: 10-15 years. SolarEdge: 15+ with optimiser warranty. Enphase: 25 years (built-in to panel).
Wall location for inverter?
Loft (cool), garage, outside (weatherproof unit). Avoid direct sunlight or heat sources.
Monitoring app worth it?
Yes — see real-time generation, history, faults. Premium brands give excellent apps free.
Will I need to replace inverter?
String: yes, at 10-15 years (£800-£1,500). SolarEdge: at 15+ years. Enphase: rarely (25-year warranty).
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
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