Tigo Review UK (2026)
Quick Answer
Add-on power optimisers, not an inverter, that bolt panel-level shading control and rapid shutdown onto a standard string inverter.
Data verified April 2026. UK installed pricing varies with installer, site and package.
At a Glance
| Origin | USA (founded 2007), leading independent module-level power electronics (MLPE) maker |
| UK support | Moderate, UK distribution via wholesalers and accredited installers |
| Capacity / sizing | Per-panel add-on (TS4-A-O / TS4-A-2); pairs with any standard string inverter |
| Efficiency | Optimiser conversion ~99.6%; no impact on inverter efficiency |
| Warranty | 25 years on TS4 optimisers |
| Indicative UK price | £25–£60 per optimiser plus a TAP gateway; far cheaper than full SolarEdge when only some panels are shaded |
Tariff Compatibility
Tigo works with the following UK export tariffs (see our best Octopus tariffs for solar guide):
- Works alongside any inverter and tariff (depends on the paired inverter)
Strengths
- Selective deployment, fit optimisers only on the panels that are actually shaded, not the whole array
- Works with almost any string inverter (Sungrow, Solis, GoodWe, SMA and more), keeping the inverter choice open
- Provides module-level rapid shutdown for fire-safety compliance
- 25-year optimiser warranty and panel-level monitoring via Tigo's app
Weaknesses
- Not an inverter, you still need a separate string inverter, so this is a complement rather than an alternative
- Optimisers add components and another monitoring layer to maintain
- Whole-array optimisation can work out closer to SolarEdge's price if most panels are shaded
- Smaller UK presence than SolarEdge, so fewer installers fit it
Who Tigo Suits Best
Roofs with partial or seasonal shading on only a few panels, where you want shading mitigation and rapid shutdown while keeping a cheaper string inverter.
When to Avoid
Most of your array is shaded (a SolarEdge or Enphase system may be neater), or your roof is unshaded (you don't need optimisers at all).
Popular Models
- TS4-A-O (optimisation + monitoring + rapid shutdown)
- TS4-A-2 (covers two panels)
- TAP + Cloud Connect (gateway and monitoring)
Frequently Asked Questions
Is Tigo an inverter?
No. Tigo makes add-on power optimisers (and rapid-shutdown devices), not inverters. You fit Tigo TS4 units to individual panels and pair them with a standard string inverter such as Sungrow, Solis or SMA.
How much do Tigo optimisers cost?
Roughly £25–£60 per optimiser plus a TAP gateway. Because you only fit them to the shaded panels, a Tigo retrofit is usually far cheaper than a full SolarEdge system where every panel needs an optimiser.
Does Tigo work with any inverter?
Yes, that is the main advantage. Tigo TS4 optimisers are inverter-agnostic and work with almost any standard string inverter, so you can keep a low-cost, well-supported inverter and add panel-level control only where needed.
Tigo vs SolarEdge for shading?
If only a few panels are shaded, Tigo is cheaper and lets you keep any inverter. If most of the array is shaded or you want a fully integrated single-brand system with panel-level data on every panel, SolarEdge is the tidier choice.
Compare with Other Inverter Brands
| Brand | UK support | Warranty | Indicative price | |
|---|---|---|---|---|
| SolarEdge | Strong, established UK office and service network | 12 years on inverter; 25 years on optimisers | £1,800–£3,200 installed (includes optimisers per panel) | View → |
| Enphase | Strong, dedicated UK distribution and installer network | 25 years on microinverters (among the longest in the market) | £2,500–£4,000 installed on a typical 4 kW system, adds ~£200/panel vs string | View → |
| Sungrow | Strong, UK office and established service network | 10 years standard (extendable to 20 years) | £1,200–£2,200 installed | View → |
| Fronius | Moderate, Europe-wide service with UK distributor support | 10 years standard; extendable to 20 | £1,500–£2,800 installed | View → |
| Growatt | Growing, UK distribution via major wholesalers, established installer base | 5–10 years standard (varies by model); extendable to 15 years | £700–£1,800 installed, among the cheapest hybrid options | View → |
| Solis | Strong, established UK office, technical support line and wholesaler network | 5 years standard, free extension to 10 years on most UK residential models when registered | £900–£2,000 installed | View → |
| SMA | Moderate, long UK market presence via distributors with manufacturer technical backup | 5 years standard; extendable to 10, 15 or 20 years | £1,300–£2,600 installed | View → |
| GoodWe | Growing, UK distribution via major wholesalers with manufacturer support | 10 years standard on UK residential hybrids; extendable to 20 years | £1,100–£2,100 installed | View → |
| Huawei | Moderate, UK distribution via specialist wholesalers and accredited installers | 10 years standard on inverter; extendable; LUNA 2000 battery 10 years | £1,400–£2,600 installed (more with optimisers) | View → |
| SolaX Power | Strong, established UK office, training and wholesaler network | 10 years standard on UK residential hybrids; extendable | £1,100–£2,200 installed | View → |
Get a Quote Including Tigo
Most MCS-certified installers carry multiple inverter brands — ask for a quote specifying Tigo if you want a system with this inverter. Use the form below to reach local installers.
Sources
John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He researches every battery and inverter brand against manufacturer datasheets, MCS and Ofgem data, and feedback from the MCS-certified installers in our directory before publishing.