--- title: "PWM vs MPPT Solar Charge Controller: Which Do You Need? | Qyvea" url: https://qyvea.co.ke/pwm-vs-mppt-charge-controller-kenya description: "PWM vs MPPT solar charge controllers explained: how each works, efficiency, panel voltage, cost, and how to size a charge controller for a Kenyan solar system." updated: 2026-10-17 --- > Markdown copy of https://qyvea.co.ke/pwm-vs-mppt-charge-controller-kenya for AI assistants. Prices and stock change; check the live page. 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The grid fails on its own schedule, and your fence, cameras and lights go with it. Read on: it takes a few minutes and could save you a lot more than that. **In this guide you will see:** - PWM: cheap, small systems, panel voltage matched to battery. - MPPT: more energy, higher panel voltages, larger systems. - Size by current (A) and maximum PV voltage. Quick answer A solar charge controller sits between the panels and the battery and stops the battery overcharging. PWM controllers are cheap and simple but need panels whose voltage closely matches the battery. MPPT controllers convert higher panel voltage into extra charging current, typically harvesting noticeably more energy, and allow longer cable runs and larger panels. [Photo: Andre Taissin / Unsplash](https://unsplash.com/photos/LBPU8K7loz8) Why this matters now ## Each outage you wait through is another night your protection depends on the grid. ### If you wait - Fence, cameras and lights go off together - Recorders restart badly or lose footage - A generator needs fuel and attention ### What you get - Batteries carry your essentials through the outage - Solar reduces what you buy from the grid - Sized to the load you actually have [Jinko Solar 450W Mono](/products/jinko-solar-450w-mono-perc-solar-panel-102 "Jinko Solar 450W Mono PERC Solar Panel")[Must 6kva solar inverter](/products/must-6kva-solar-inverter-28900 "Must 6kva solar inverter")[200Ah 24V LiFePO4 Lithium](/products/200ah-24v-lifepo4-lithium-battery-pack-413 "200Ah 24V LiFePO4 Lithium Battery Pack") [Get my free quote on WhatsApp](https://wa.me/254113301244?text=Hi%20Qyvea%2C%20I%20read%20your%20guide%3A%20PWM%20vs%20MPPT%20Solar%20Charge%20Controllers.%20I%20want%20solar%20and%20backup%20power%20sorted.%20Can%20you%20help%3F)Reply usually within 30 minutes. Free site survey in Nairobi and nearby counties. Real products, live prices, in stock now ## Key takeaways - PWM: cheap, small systems, panel voltage matched to battery. - MPPT: more energy, higher panel voltages, larger systems. - Size by current (A) and maximum PV voltage. - Hybrid inverters usually have MPPT built in. - Never exceed the controller's max PV voltage. ## How they differ | | PWM | MPPT | | --- | --- | --- | | How it works | Connects panel to battery in pulses | Converts panel voltage down, current up | | Panel voltage | Must match battery | Can be much higher | | Energy harvest | Lower | Higher, especially in cool or cloudy conditions | | Cost | Low | Higher | | Best for | Small lights and TV kits | Home and business systems | ## Sizing a controller 1. **Add panel power**: For example 4 x 400 W = 1,600 W. 2. **Divide by battery voltage**: 1,600 W / 24 V = about 67 A, so choose a larger rating. 3. **Check PV voltage**: Series panel open-circuit voltage must stay below the controller's maximum, with margin for cool mornings. 4. **Add a safety margin**: Choose a controller rated above your calculated current. **Tip**: If you're buying a hybrid inverter, the MPPT controller is already inside it. You don't need a separate one. Read [battery and inverter sizing](https://qyvea.co.ke/battery-and-inverter-sizing-kenya). ## Frequently asked questions Is MPPT always better? It harvests more energy, but for a very small, matched system a PWM can be good enough. Can I use a 12 V panel on a 24 V battery? Not with PWM. MPPT can work if the panel's voltage is high enough above the battery. Does a charge controller power my appliances? No. It charges the battery; an inverter converts battery DC to AC for appliances. ## Why customers choose Qyvea **Genuine brands**: Manufacturer warranty on what we sell, so you are not gambling on the box. **One team, start to finish**: The people who advise you also install and support it. **Fast answers**: WhatsApp replies usually within 30 minutes, and delivery within 24 hours in Nairobi. **Easy to buy**: Pay by M-Pesa, bank transfer or card. Free delivery in Nairobi on orders over KES 5,000. **Risk taken off you**: 7-day returns and exchanges on products, and a workmanship warranty on installations. **Customers say so**: Rated 4.6/5 from 57 Google reviews. **Your next step takes one minute:** send us a photo of the place on WhatsApp and we will tell you what it needs. ## Related articles [Solar & Electrical · Guide Battery & Inverter Sizing for Backup Power Watts, hours and depth of discharge: the simple maths behind how big your batteries and inverter need to be. 2 min read**READ FULL ARTICLE →**](https://qyvea.co.ke/battery-and-inverter-sizing-kenya)[Solar & Electrical · Comparison Deye vs Must vs Growatt vs Solis: Choosing a Hybrid Inverter The four inverter brands Kenyans search most, and the specs that actually decide which one fits. 2 min read**READ FULL ARTICLE →**](https://qyvea.co.ke/hybrid-inverter-brands-kenya)[Solar & Electrical · Comparison Lithium vs Lead-Acid Solar Batteries Usable capacity, lifespan and real cost per cycle: which battery type suits your backup. 2 min read**READ FULL ARTICLE →**](https://qyvea.co.ke/lithium-vs-lead-acid-solar-battery-kenya) ### Related services [Solar Installation](https://qyvea.co.ke/solar-installation)[Solar Backup Solutions](https://qyvea.co.ke/solar-solutions) ### Related products [Best solar backup systems](https://qyvea.co.ke/best-solar-backup-system-kenya) ### Related projects [Real Qyvea case studies](https://qyvea.co.ke/projects#case-studies) [← Previous**On-Grid vs Hybrid vs Off-Grid Solar**](https://qyvea.co.ke/on-grid-vs-hybrid-vs-off-grid-solar-kenya)[Next →**: Power Keeps Tripping? How to Find the Faulty Circuit or Appliance**](https://qyvea.co.ke/power-keeps-tripping-kenya) ## Not sure which system you need? Request an assessment and we'll recommend what fits your site. Chat with us — 30 min response --- **Qyvea Limited** · Westlands, Nairobi, Kenya (delivery only, no walk-in pickup) · serving all 47 counties Phone/WhatsApp: [+254 113 301 244](https://wa.me/254113301244) · Email: info@qyvea.co.ke · Shop: [qyvea.co.ke/products](https://qyvea.co.ke/products) · Facts: [qyvea.co.ke/qyvea-facts](https://qyvea.co.ke/qyvea-facts)