Charge Controllers
MPPT and PWM controllers for off-grid and hybrid systems — Victron, Morningstar, OutBack, and more.
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MPPT vs PWM
MPPT controllers convert excess panel voltage into charging current, harvesting 15–30% more energy than PWM — and they let you run higher-voltage arrays on 12, 24, or 48V battery banks. Size the controller by array watts divided by battery voltage, plus 25% headroom: a 1,000W array on a 24V bank needs a 50A controller. Victron SmartSolar units add Bluetooth monitoring; Morningstar and OutBack remain the workhorses for unattended off-grid sites.
Pro Tips
- MPPT pays for itself on arrays over roughly 200W
- Amps equal array watts divided by battery volts, times 1.25
- Match controller voltage to the battery bank: 12, 24, or 48V
Charge Controllers — Frequently Asked Questions
MPPT or PWM?
MPPT harvests 15–30% more energy by converting excess panel voltage into charging current, and it allows higher-voltage arrays on lower-voltage battery banks. PWM only makes sense on very small, budget systems.
How do I size a charge controller?
Amps equal array watts divided by battery voltage, plus 25% headroom. A 1,000W array on a 24V bank needs a 50A controller. Also confirm the controller max PV input voltage against your string Voc in cold weather.
Will it work with lithium batteries?
All modern Victron, Morningstar, OutBack, and EPEVER controllers have LiFePO4 charge profiles. Many Victron SmartSolar units also integrate with BMS monitoring over Bluetooth.
Can I monitor my system remotely?
Yes — Victron SmartSolar has built-in Bluetooth and pairs with Cerbo GX for full remote monitoring; Morningstar and OutBack offer Ethernet and display options.
Related Departments
Solar Panels
Inverters
Batteries & Storage
Racking & Mounting
Generators
EV Chargers
Electrical Supplies
Wire & Cable
Charge Controllers — Delivered Nationwide
Solar charge controllers at PES Supply — MPPT and PWM charge controllers from Victron Energy, Morningstar, OutBack Power, Schneider Electric, EPEVER, and Magnum Energy. 12V, 24V, and 48V battery charging for off-grid cabins, RVs, marine, and telecom with monitoring accessories and breakers in stock.