The inverter is the brain of a solar PV system. It converts DC from the panels to AC for the home, handles battery charging if you have one, and reports to your monitoring app. A good inverter is invisible — it just works for 12-15 years. A bad inverter is the single most common cause of “my solar isn’t generating” calls we get from customers we didn’t install for.
Here’s the 2026 comparison of the inverter brands worth installing.
The three inverter architectures
Three fundamentally different approaches to converting DC solar power to AC for the home:
String inverter — one (or two) inverters convert all panels in series. The standard approach for 15 years. Simple, reliable, cheap. Limitation: if one panel is shaded, the entire string suffers because all panels run at the lowest-performing panel’s output.
Hybrid inverter — a string inverter that also handles battery charging and discharging. Standard for solar + battery installs. Solis, GivEnergy, and SolarEdge all make hybrid inverters.
Microinverter / panel-level optimiser — one tiny inverter (or optimiser) per panel. Each panel operates independently, so shading on one panel doesn’t drag down the others. SolarEdge optimisers and Enphase microinverters are the leading examples. More expensive but better for shaded or complex roofs.
Brands we install and recommend in 2026
Solis — Workhorse string and hybrid inverters. Mid-range price, good UK support, 12-year warranty as standard. Solis Cloud monitoring is functional but less polished than premium brands. Best for: budget-conscious installs and most new solar + battery configurations where the roof has good aspect.
GivEnergy — UK-designed, particularly strong in the battery integration space. Hybrid inverters and AC-coupled battery inverters cover most install scenarios. The GivEnergy Cloud app is class-leading for live data. Best for: solar + battery installs where battery is the primary investment, or retrofit batteries to existing solar.
SolarEdge — Premium choice. Uses optimisers (one per panel) that work with a centralised inverter. Best-in-class for shaded or complex roofs because each panel operates independently. Tight integration with SolarEdge home battery for DC-coupled efficiency gains. Best for: roofs with shading, dormers, multi-aspect installs, premium-spec residential.
Enphase IQ — Microinverter pioneer. One small inverter per panel mounted under the panel itself. Maximum panel-level optimisation, longest manufacturer warranty (25 years), modular expandability. Best for: complex roofs, premium installs, customers who value warranty length.
Fronius — Premium Austrian-engineered string inverters. Robust, high-quality build, slightly above mainstream pricing. Strong commercial-scale presence. Best for: high-end residential or smaller commercial where Fronius pricing makes sense.
Huawei Smart String — Major presence internationally; smaller UK installer base. Excellent monitoring, competitive pricing. We don’t install Huawei as standard but happy to consider on request — geopolitical and parts-availability questions sometimes affect customer preference.
Side-by-side comparison
| Brand | Type | Warranty | UK strength | Best for |
|---|---|---|---|---|
| Solis | String + hybrid | 12 years | Strong | General-purpose, value installs |
| GivEnergy | Hybrid + AC battery | 12 years | UK-designed | Battery-focused installs |
| SolarEdge | Optimiser + central | 12 years (extendable) | Strong | Shaded / complex roofs |
| Enphase IQ | Microinverter | 25 years | Growing | Premium / complex roofs |
| Fronius | String + hybrid | 10 years | Premium | High-end residential |
| Huawei | String | 10 years | Niche | Not our default |
How to pick the right one
The right inverter depends on three things: roof complexity, battery plans, and budget.
If you have a simple south-facing roof, no shading, no battery plans
Best: Solis string inverter. Cheapest, simplest, most reliable. Single MPPT design works fine for unshaded uniform installs.
If you have a simple roof but plan to add a battery later
Best: Solis hybrid inverter. Same Solis pricing, but the hybrid model can drop a battery in later without inverter replacement. Worth the modest premium over a string inverter for the optionality.
If you have any shading or roof complexity
Best: SolarEdge with optimisers OR Enphase microinverters. Both let individual panels operate independently. SolarEdge has the lower upfront cost; Enphase has the longer warranty. We split roughly 60/40 in favour of SolarEdge for shaded installs.
If battery is the primary investment
Best: GivEnergy hybrid (for new combined solar + battery) OR GivEnergy AC battery (for retrofit to existing solar with any inverter brand). UK-designed, market-leading app, 12-year warranty, modular battery expansion.
If budget is no object and you want max longevity
Best: Enphase microinverters. 25-year warranty matches panel life. Maximum panel-level resilience. The closest thing to “fit and forget for 25 years” in the inverter market.
Common inverter mistakes installers make
We get called out to assess underperforming installs from other installers reasonably often. The common faults:
1. No-name Chinese inverters. Some installers spec inverters at the bottom of the price range — brands you’ve never heard of with 5-7 year warranties. Saves £200-400 on capital cost. Costs the customer 6-10 years of life when the inverter fails just out of warranty. Don’t accept this in your quote.
2. Single string used for multi-aspect roofs. If half your panels face east and half face west, they generate at different times of day. A single-string inverter clips the lower of the two — significantly reducing total yield. Either two strings or panel-level optimisers are needed.
3. Undersized inverter (DC oversizing). A 4kW solar array peaks at ~4kW. A 3kW inverter clips the peak output, losing 5-15% of annual generation. Some installers do this deliberately to save cost; we don’t. Our default is matched DC and AC ratings or modest oversizing.
4. Indoor inverter siting near hot surfaces. Inverters run hot and need ventilation. Mounting one in an airing cupboard, next to a boiler, or in direct sun reduces inverter life by 20-40%. We mount in cool, ventilated locations and document the airflow assessment in the install handover.
5. No surge protection. UK grid surge events can damage inverter electronics. Standard install should include Class II surge protection on the AC side. Some installers skip this. We don’t.
How long do inverters last?
Manufacturer warranties tell you the minimum expected life:
- Solis: 12 years standard
- GivEnergy: 12 years standard
- SolarEdge: 12 years standard, extendable to 25 years
- Enphase: 25 years
- Fronius: 10 years
In practice, well-installed inverters in good environments typically last 14-18 years. Replacement at end of life is straightforward — the panel mounting and electrical infrastructure stay; only the inverter and possibly battery are swapped. Cost of mid-life replacement is typically £900-£1,600 for a standard string inverter.
What we install by default
Our default for new AMP solar + battery installs in 2026:
- Standard install: Solis hybrid inverter + GivEnergy AC battery (or Solis-paired Pylontech). Best balance of price, quality, app and warranty.
- Shaded or complex roof: SolarEdge with per-panel optimisers + SolarEdge Home Battery (DC-coupled).
- Battery retrofit to existing solar: GivEnergy AC battery — works with any existing inverter brand.
- Premium spec: Enphase IQ microinverters or Fronius hybrid. Suggested only where customer specifically values longer warranty.
We pick by specification rather than margin — the lowest-margin option (Solis) is usually the right answer for most installs, and we recommend it as such.
What to ask when comparing quotes
If you’re getting solar quotes from multiple installers:
- “Which inverter is in the quote?” Get the specific make and model. Avoid any quote with a no-name brand or undisclosed manufacturer.
- “What’s the manufacturer warranty?” Should be 10+ years standard, 12+ on the brands we recommend.
- “Why this inverter for my roof?” A real installer can articulate why a specific inverter fits your roof — shaded, multi-aspect, simple south, etc. A salesperson with a template can’t.
- “What happens if it fails in year 8?” Reputable installers cover labour cost for in-warranty replacement; some only cover the unit itself. Worth confirming.
- “Can you show me the inverter spec sheet?” If they don’t have it to hand or won’t email it, that’s a flag.
Book a free survey → and we’ll specify the right inverter for your specific roof, battery plans and budget — with rationale, not just a brand badge.
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