String vs Hybrid vs Microinverters: Which One Do You Need?

Most UK quotes now default to a hybrid inverter, and there’s a reason for that. It costs a few hundred pounds more than a basic string inverter but leaves the door open for a battery later without swapping any hardware. A plain string inverter is still the cheapest route on a clean, unshaded roof, and microinverters earn their higher price back on a roof with shading or more than one orientation. Which one suits you comes down to your roof and whether a battery is likely, not which type is “best” in the abstract.

How each type actually works

• String inverter: all your panels are wired together in one series (a “string”), and a single inverter converts their combined DC output to AC for the house. Cheapest, simplest, and the standard choice for decades.
• Hybrid inverter: does the same job as a string inverter, but has a built-in DC connection for a battery, so solar and storage share one box instead of two.
• Microinverters: a small inverter is fitted to the back of every panel, converting each one’s output individually before it ever gets combined.

The comparison at a glance

	String inverter	Hybrid inverter	Microinverters
Extra cost vs a basic string setup	Baseline	Roughly £400 to £700 more	Roughly £600 to £1,100 more on a typical 4kW system
Battery-ready	No, needs adding later	Yes, built in	Depends on the brand
Shading tolerance	Weak, one shaded panel drags down the whole string	Same as string, unless paired with optimisers	Strong, each panel works on its own
Typical lifespan	10 to 15 years	10 to 15 years	Up to 25 years for the leading brand
Best suited to	A clean, unshaded roof and a tight budget	Most UK homes, especially if a battery is likely within five years	Roofs with shading, dormers, or more than one angle

Extra costs vary by installer and system size. Get matched with an installer for a quote against your actual roof rather than a general range.

String inverters: cheapest, simplest, weakest on shade

A string inverter is still the default on a straightforward south-facing roof with nothing casting shade across it. Modern units from the likes of Solis, Growatt and GoodWe run at 97 to 98% efficiency and come with a phone app for monitoring, so you’re not giving anything up on a clean roof. The catch is that every panel in a string is only as good as its weakest member. A chimney’s shadow crossing one corner, a build-up of bird mess, or a single faulty panel pulls down the output of everything wired alongside it, not just that one panel.

Hybrid inverters: the default for most UK quotes now

A hybrid inverter handles both your G98 and G99 grid-connection cases (see our DNO approval guide if you haven’t come across those terms yet), and it’s built to accept a battery from day one. If there’s any real chance you’ll want a battery within the next five years, paying the £400 to £700 premium now is usually cheaper than buying a second inverter later just to add one. See our battery storage cost and payback guide if you’re weighing that decision now.

One thing worth checking on any quote: who’s actually behind the hardware. GivEnergy, a name that showed up on a lot of UK hybrid inverter and battery quotes, entered administration in April 2026. Systems already installed keep working fine since the hardware doesn’t depend on the manufacturer’s servers, but the company itself is no longer honouring new hardware warranties. If a quote includes GivEnergy kit, it’s worth asking your installer directly who’s backing the warranty now.

Microinverters: built for awkward roofs

Microinverters cost more, both in parts and in the extra labour of fitting one unit per panel, but they solve the shading problem completely. Shade a panel and only that panel’s output drops, everything else keeps working normally. Enphase is the dominant brand in this space and backs its units with a 25-year warranty, well beyond the 10 to 15 years typical of a string or hybrid inverter, so you’re less likely to need a mid-life replacement. APsystems offers a cheaper alternative for anyone who wants the shading benefit without the full Enphase price tag.

Which one actually suits your home

If your roof is clean, faces roughly south, and a battery isn’t on your radar, a string inverter does the job for the least money. If a battery is even a maybe within the next few years, a hybrid inverter is the sensible default and what most installers will quote you anyway. If your roof has a chimney, a dormer, trees nearby, or panels facing more than one direction, microinverters are the one type that actually solves that problem rather than working around it. See our solar cost and payback guide for how inverter choice feeds into the wider numbers, or get matched with vetted installers who can tell you which setup makes sense for your specific roof.

Frequently asked questions