{"id":2304,"date":"2026-08-31T13:32:00","date_gmt":"2026-08-31T10:32:00","guid":{"rendered":"https:\/\/mits.sa\/%d8%a7%d8%ae%d8%aa%d9%8a%d8%a7%d8%b1-%d8%a7%d9%84%d8%a7%d9%86%d9%81%d8%b1%d8%aa%d8%b1\/"},"modified":"2026-10-17T08:29:55","modified_gmt":"2026-10-17T05:29:55","slug":"choosing-solar-inverter","status":"publish","type":"post","link":"https:\/\/mits.sa\/en\/choosing-solar-inverter\/","title":{"rendered":"How do you choose the right inverter for your solar system?"},"content":{"rendered":"<p>To choose the right solar inverter, you need to determine three things in order: the type of system (grid-tied, off-grid, or hybrid), the maximum load operating simultaneously, and the inverter&#039;s compatibility with the voltage of the panels and batteries. The inverter is the brain of the system, and choosing the wrong one can lead to either frequent breakdowns or wasted energy.<\/p>\n<div class=\"mits-box\"><strong>In short:<\/strong><\/p>\n<ul>\n<li>The type of inverter depends on the system type: connected, separate, hybrid, or variable speed for submersible pumps.<\/li>\n<li>The power is calculated from the loads working together, with a margin for the operating current of air conditioners and motors.<\/li>\n<li>Check the MPPT voltage range, number of inputs, and supported battery voltage.<\/li>\n<li>Good efficiency 95\u201398%, typical lifespan 10\u201315 years, and ventilation prolongs life.<\/li>\n<\/ul>\n<\/div>\n<h2>What exactly is the function of an inverter?<\/h2>\n<p>The panels produce direct current (DC), while the appliances in the home and network operate on alternating current (AC). An inverter converts one to the other, but in modern systems, it does much more:<\/p>\n<ul>\n<li>It tracks the maximum power point of the panels (MPPT) to extract the greatest possible power at any given moment.<\/li>\n<li>In hybrid and separate systems, it manages battery charging and discharging.<\/li>\n<li>In interconnected systems, it synchronizes with the network and automatically disconnects when the network is interrupted to protect technicians.<\/li>\n<li>Production and breakdowns are recorded, and many of them allow monitoring from a mobile phone.<\/li>\n<\/ul>\n<h2>First step: Choose the type according to your system<\/h2>\n<table class=\"mits-t\">\n<thead>\n<tr>\n<th>Inverter type<\/th>\n<th>Works with<\/th>\n<th>Batteries?<\/th>\n<th>Suitable<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>On-Grid<\/td>\n<td>Panels and mesh<\/td>\n<td>no<\/td>\n<td>Homes and businesses connected to the network that want to reduce their bills<\/td>\n<\/tr>\n<tr>\n<td>Off-Grid<\/td>\n<td>Panels and batteries<\/td>\n<td>Yes, essential<\/td>\n<td>Off-grid rest areas and farms<\/td>\n<\/tr>\n<tr>\n<td>Hybrid<\/td>\n<td>Panels, batteries, and grid<\/td>\n<td>Yes, optional depending on the model.<\/td>\n<td>Who wants to reduce the bill with a backup during outage time?<\/td>\n<\/tr>\n<tr>\n<td>Voltage changer for submersible pump (solar VFD)<\/td>\n<td>Panels and motor directly<\/td>\n<td>No habit<\/td>\n<td>Agricultural wells, and water is stored in a tank<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>If you haven&#039;t decided on the type of system yet, read first. <a href=\"\/en\/on-grid-vs-off-grid-vs-hybrid\/\">The difference between On-Grid, Off-Grid and hybrid systems<\/a>Because everything that follows depends on this decision.<\/p>\n<p>Agricultural wells have a special case: the submersible pump requires a dedicated solar speed controller that can handle the motor&#039;s starting current and adjust the speed according to the intensity of the sun. The solar panels are chosen with a power rating approximately 1.3 to 1.5 times that of the motor. Further details are available on [page number\/page number]. <a href=\"\/en\/solar-system-pump\/\">Agricultural submersible pump systems<\/a>.<\/p>\n<p>Important note for grid-connected systems: Grid connection in the Kingdom is governed by the Electricity Regulatory Authority&#039;s regulatory framework and is handled by a qualified contractor through the Saudi Electricity Company. Therefore, the inverter must be of a type approved for grid connection, and you should verify the current requirements with the relevant authorities before purchasing.<\/p>\n<h2>Step two: Calculate the required capacity<\/h2>\n<h3>In separate and hybrid systems<\/h3>\n<p>Here, the inverter directly powers the loads, so its continuous power output must be greater than the sum of the loads that might operate simultaneously. Example: a break in Al-Qassim.<\/p>\n<ul>\n<li>Two 24000 BTU split air conditioners: 2 x 2.6 = approximately 5.2 kW maximum.<\/li>\n<li>Lighting, refrigerator and small appliances: Assume 1 kilowatt.<\/li>\n<li>Total: 5.2 + 1 = 6.2 kilowatts.<\/li>\n<\/ul>\n<p>A 6 kW inverter would be right on the edge, and it is more appropriate to choose a higher power with a clear margin, such as 8 kW, to withstand the moments of operation and not always operate at its maximum limit.<\/p>\n<h3>Starting current for air conditioners and motors<\/h3>\n<p>Non-inverter air conditioners, pumps, and refrigerators draw significantly more current when switched on than their normal operating current. Therefore, check the specifications for &quot;peak power&quot; or &quot;surge power,&quot; not just the continuous power. It&#039;s best to switch on large loads one at a time, rather than all at once. If the air conditioners are inverter-type, their starting current is lower, which is easier on the entire system.<\/p>\n<h3>In network-connected systems<\/h3>\n<p>The connected inverter does not supply power to the loads alone; the grid compensates for any shortfall. Therefore, its power rating is determined by the panel power rating, not the peak load. Typically, the panel power rating is close to or slightly higher than the inverter&#039;s rating, within the limits specified in its data sheet, as panels rarely reach their rated power due to heat and dust. For example, a system of 10 panels x 550W = 5.5kW is usually connected to an inverter close to 5kW, with the final decision resting with the designer based on the inverter&#039;s specifications.<\/p>\n<h2>Step three: Technical compatibility with boards and batteries<\/h2>\n<h3>MPPT voltage range and number of inputs<\/h3>\n<p>Every inverter has a voltage range within which its maximum power tracker operates, and a maximum voltage limit that must never be exceeded. The number of panels connected in series must provide a voltage within this range in both hot summer and cold winter conditions, as panel voltage increases in cold weather. This is a calculation performed by the designer for each specific scenario.<\/p>\n<p>If your panels are oriented in two different directions, for example, one south-facing and one west-facing, choose an inverter with two or more MPPT inputs to prevent the weaker panel from drawing performance from the stronger one. Details on orientations are available in the article. <a href=\"\/en\/solar-panel-tilt-angle\/\">Best orientation and angle for panels<\/a>.<\/p>\n<h3>battery voltage<\/h3>\n<p>Inverters for split and hybrid systems are designed for a specific battery voltage: 12, 24, or 48 volts, with some models offering higher voltages. For medium and large systems, 48 volts is preferred because it provides lower current, resulting in smaller cables, reduced heat, and lower losses. Ensure the inverter supports your battery type, especially lithium, and communicates with its management system. For a comparison of different types, refer to [reference\/website\/etc.]. <a href=\"\/en\/solar-batteries-lithium-vs-gel\/\">Lithium or gel batteries<\/a>.<\/p>\n<h3>Wave shape<\/h3>\n<p>Always choose a pure sine wave inverter. Modified sine wave inverters cause noise and overheating in motors and air conditioners, and may damage some electronic devices.<\/p>\n<h2>Efficiency, heat, and lifespan<\/h2>\n<p>The efficiency of good inverters is between 95 and 98%. The difference of 3% may seem small, but it is repeated per kilowatt-hour throughout the system&#039;s lifespan. For example, a system producing 8000 kWh annually before the inverter is installed would have a difference of 8000 x 0.03 = 240 kWh per year between 95% and 98%.<\/p>\n<p>Heat is the enemy of inverters. Most inverters automatically reduce their power output when their temperature rises, and this often happens if they are installed under the midday sun in Riyadh or Al-Ahsa. The typical lifespan of an inverter is 10 to 15 years, which is less than the lifespan of the solar panels, so plan to replace it once during the system&#039;s lifetime.<\/p>\n<ul>\n<li>Install it in a shaded and well-ventilated place, and leave the spaces that the manufacturer requests around it.<\/li>\n<li>Check the protection rating (IP) if the installation is outdoors, to protect it from dust and moisture.<\/li>\n<li>Do not place it in a closed, unventilated room next to batteries.<\/li>\n<\/ul>\n<div class=\"mits-tip\"><strong>\ud83d\udca1 Tip:<\/strong> Before buying an inverter, make a list of the devices you want to run simultaneously, and note the power rating of each device from its specifications. This simple list prevents the most common mistake: a small inverter that shuts off every time the second air conditioner is switched on.<\/div>\n<h2>Common mistakes in choosing an inverter<\/h2>\n<ol>\n<li>Choosing the power from the sum of all devices instead of the simultaneous loads results in an inverter that is larger and more expensive than needed.<\/li>\n<li>Conversely: Ignoring the starting current, the inverter will switch off when the pump or air conditioner is switched on.<\/li>\n<li>Connecting panels with a voltage exceeding the maximum input limit of the inverter may damage it immediately.<\/li>\n<li>Purchasing a tethered inverter is not acceptable for network connection.<\/li>\n<li>Install it in direct sunlight without ventilation.<\/li>\n<\/ol>\n<p>To calculate the size of the entire system, use <a href=\"\/en\/solar-energy-calculator\/\">Solar Energy Calculator<\/a>If your project is commercial or complex, then the service <a href=\"\/en\/solar-energy\/engineering-consulting\/\">Engineering Consulting<\/a> It helps you choose the right equipment.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<div class=\"mits-faq\">\n<h3>Can I add batteries later to a connected inverter?<\/h3>\n<p>A standard plug-in inverter cannot power batteries. If you anticipate adding batteries in the future, choose a hybrid inverter from the start, or add dedicated equipment later.<\/p>\n<h3>Is a larger inverter always better?<\/h3>\n<p>No. An inverter much larger than needed costs more and may be less efficient at lower loads. A reasonable margin above the concurrent loads is required.<\/p>\n<h3>How long does an inverter last?<\/h3>\n<p>Typically 10 to 15 years, and its lifespan is extended with good ventilation, installation in the shade and protection from dust.<\/p>\n<h3>Does the connected inverter work during a power outage?<\/h3>\n<p>No, it automatically disconnects during a power outage as a safety measure. If you need power during an outage, you&#039;ll need a hybrid system with batteries.<\/p>\n<h3>What is the importance of multiple inputs for MPPT?<\/h3>\n<p>It allows for the connection of groups of panels in different directions or angles without one affecting the other, which is useful in partitioned surfaces.<\/p>\n<\/div>\n<div class=\"mits-cta\">\n<p><strong>Do you need a suitable system?<\/strong> The MITS team calculates your loads and selects the inverter that is compatible with your panels and batteries, then designs and installs the system.<\/p>\n<p><a href=\"\/en\/contact\/\">Request a price quote<\/a> \u00b7 <a href=\"https:\/\/wa.me\/966575993880\">WhatsApp 0575993880<\/a> \u00b7 <a href=\"\/en\/solar-energy-calculator\/\">Try the calculator<\/a><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A guide to choosing a suitable solar power inverter: its type according to the system, calculating its power capacity from the loads, its compatibility with the voltage of the panels and batteries, and common mistakes to avoid.<\/p>","protected":false},"author":1,"featured_media":2303,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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choose a solar inverter: the right type for your system, sizing from your loads, panel and battery voltage matching, and mistakes to 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