The inverter is the busiest part of a solar system. Here is how the three designs differ, and which suits your roof, shade and battery plans.
A string inverter is one box on the wall that converts the power from a whole row of panels; microinverters sit under each panel and convert them one by one; a hybrid inverter is a string-type inverter that can also charge and run a battery. For an unshaded roof facing one direction, a string inverter is the simple, common choice. Microinverters or panel optimisers help when parts of the roof are shaded or face different ways. A hybrid inverter makes sense if you want a battery now or later. Remember that an ordinary grid-tied inverter switches off in a power cut, so it does not give backup power unless it is designed to.
Solar panels produce direct current (DC); your house and the grid use alternating current (AC). Wikipedia’s solar inverter article describes the inverter as the component that converts the variable DC output of the panels into AC that can be fed into the grid or used at home. It also tracks the maximum power point, constantly adjusting so the panels deliver as much power as the conditions allow, and it shuts the system down safely when the grid goes off.
Our solar panel cost guide makes one practical point about inverters: they are the part to budget for, because you should plan to replace the inverter once over a panel life of around 25 years.
| Design | Where it sits | Strengths | Weaknesses |
|---|---|---|---|
| String inverter | One unit on a wall, fed by strings of panels | Simple, fewest electronics on the roof, easy to reach | A weak or shaded panel drags down its whole string |
| Microinverters | One small inverter under each panel | Each panel works alone; panel-level monitoring | Many electronics on a hot roof; replacing one means going up |
| String + optimisers | Optimiser under each panel, one inverter on the wall | Panel-level tuning with one central inverter | More parts than a plain string system |
| Hybrid inverter | One unit on a wall, connected to panels, battery and grid | Ready for a battery; can supply backup if designed for it | Costs more than a plain string inverter |
Most home systems in Malaysia use a string inverter. Panels are wired in series into one or more strings, and each string feeds the inverter on a wall, often in the porch, the store room or near the distribution board. The weakness is well known: the Wikipedia article explains that a string acts like a single larger panel limited by its poorest performer, so shade or a fault on one panel pulls the whole string down. Modern inverters with more than one tracker let differently facing roof sections run on separate strings, which reduces the problem.
A microinverter is a small inverter mounted under each panel. The Wikipedia article gives the main advantage: microinverters electrically isolate the panels from one another, so shading, debris or a failed panel does not drag down the rest of the array. They also let you see each panel’s output. The trade-off is more electronics sitting on a hot roof, and a failed unit means someone going back up onto the roof to replace it.
How big is the shade benefit? The same article reports shade studies by microinverter and optimiser companies showing small yearly gains of 2%, 5% and 8% in light, medium and heavy shade over an older string inverter. The gain is real but modest, and it matters most on roofs that really are shaded. On a clear, unshaded roof facing one way, a good string inverter with the right number of trackers usually gives most of the benefit for less money and fewer parts on the roof.
Wikipedia’s power optimizer article describes an optimiser as a DC-to-DC converter fitted to each panel that tunes that panel individually, while a single inverter in a separate box converts the power for the whole array. Its supporters argue it keeps most of the microinverter advantages at a lower overall cost.
A hybrid inverter connects the panels, a battery and the grid to one unit. The Wikipedia article describes such hybrid inverters as managing the array, battery storage and the grid together, usable for grid-tie, stand-alone or backup operation. Our home solar battery guide explains that some systems use a hybrid inverter that accepts a battery from the start, while others need extra equipment to add one later, so decide early if a battery is likely.
Usually not. The Wikipedia article states that grid-tie inverters are designed to shut down automatically when the utility supply is lost, for safety, and do not provide backup power during outages. Our battery guide makes the same point: a normal grid-connected system switches off when the grid goes down, and a battery only provides backup when the inverter and wiring are designed for it. If backup matters to you, say so at the design stage.
| Your situation | Usually suits |
|---|---|
| Unshaded roof, one main direction, modest budget | String inverter |
| Shade from trees, a neighbour’s wall or a water tank | Microinverters or string with optimisers |
| Panels on several roof faces | Multi-tracker string inverter, micros or optimisers |
| Want a battery now or later | Hybrid inverter |
| Need backup during outages | A hybrid system designed for backup |
A wall-mounted inverter should sit somewhere shaded and ventilated, reachable for inspection, and close enough to the distribution board to keep cable runs sensible. Heat shortens the life of electronics, so a spot in full afternoon sun is a poor choice. Connecting an inverter to the home’s wiring is electrical work; our solar installer guide explains how to check an installer’s registration with SEDA and what to ask about electrical work.
Roof work comes with any design. Microinverters and optimisers put more parts on the roof, and every roof fixing is a potential leak point; our solar roof leak guide covers what goes wrong.
ClickBina does not publish separate inverter prices. These installed-system figures from our solar panel cost guide include the inverter; the inverter brand and design are among the things that move the price.
| System size | Indicative installed cost | Source |
|---|---|---|
| 3 kWp | RM14,000–RM20,000 | Solar panel cost guide |
| 6 kWp | RM24,000–RM32,000 | Solar panel cost guide |
| Site visit for a wider renovation job | RM150 | Waived if you go ahead |
WhatsApp us your job details for a quote — we reply within the hour.
💬 WhatsApp for a quoteWhen comparing quotes, check that each names the inverter make, model and design, the number of trackers, whether optimisers or micros are included, and whether it is battery-ready.
Solar installation is not one of ClickBina’s own listed trades, so we do not install solar systems ourselves. Where solar is part of a roof repair, re-roofing or whole-house renovation, ClickBina handles whole-house refurbishment and coordinates the trades on one job. WhatsApp us your job details for a quote: the roof type, any shading, and whether you want a battery. We reply within the hour, with a flat price, no hidden charges, and a site visit of RM150, waived if you go ahead.
Pricing note: system prices are indicative Klang Valley figures quoted from ClickBina’s solar panel cost guide.
WhatsApp us your job details for a quote — we reply within the hour.
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