MPPT Solar Charge Controllers

MPPT Solar Charge Controllers for Caravan, Marine and Off-Grid Systems

An MPPT solar charge controller tracks the maximum power point of your panels and converts excess panel voltage into usable charge current. Compared with a PWM regulator, an MPPT controller can deliver more energy to the battery, particularly in cool weather, under partial cloud, or where panel voltage sits well above battery voltage. This range covers 12V, 24V and 48V systems for caravans, RVs, 4WDs, boats, trucks, tiny homes and off-grid installations.

Victron SmartSolar and BlueSolar MPPT

Victron solar controllers make up most of this range, from the compact MPPT 75/10 to the high-voltage SmartSolar MPPT RS 450/200. The naming is simple. In a Victron MPPT 100/30, the first number is the maximum PV open circuit voltage (Voc) and the second is the maximum charge current in amps. Popular caravan and RV choices include the MPPT 100/20, 100/30 and 100/50. Larger 150V and 250V models up to 100A suit bigger arrays and 48V battery banks.

SmartSolar models include built-in Bluetooth for monitoring and setup through the VictronConnect app. You can view battery voltage and solar history and adjust charge algorithms and load output settings. BlueSolar models are the non-Bluetooth alternative. They connect through a VE.Direct interface or dongle from our solar controller accessories range. Selected larger units offer VE.CAN networking and a choice of MC4 or Tr (screw terminal) PV connections.

Genasun, Morningstar, Enerdrive and Exotronic

• Genasun GV series: Compact lead-acid and lithium MPPT controllers from 4A to 10.5A for small panels, plus OEM PCB versions. They have no moving parts and are rated from -40 to +85°C.
• Genasun GVB boost: These controllers step a standard 12V panel up to charge 24V, 36V or 48V batteries, with waterproof options available. Browse the dedicated voltage boost MPPT solar charge controllers.
• Morningstar EcoBoost: 20A, 30A and 40A MPPT controllers, with optional meter versions.
• Enerdrive: 12/24V 10A, 20A and 40A MPPT controllers with an integrated display.
• Exotronic: A 12V 20A MPPT controller with Bluetooth and a built-in display.

How to Choose the Right MPPT Controller

Start with your battery voltage. A 12V MPPT solar charge controller suits most caravans and 4WDs. A 24V or 48V capable model suits trucks, larger boats and off-grid homes. Next, check that the combined Voc of your array, allowing for cold-morning voltage rise, stays below the controller's maximum PV voltage. Then size the charge current. As a rough guide, divide the array wattage by the battery voltage. For example, 400W on a 12V battery needs about 33A, which points to a 100/30 at the margin or a 100/50 for headroom. Also confirm the battery chemistry. Some Genasun models are specific to lead-acid or lithium. Finally, decide whether Bluetooth monitoring, a display or VE.CAN integration matters for your build. Our guide to choosing the right solar charge controller explains MPPT and PWM differences and sizing in more detail.

Compare current ratings, PV voltage limits and connectivity above, then order the MPPT controller that matches your panels and battery bank. If you need help confirming sizing for your system, contact our technical team before you buy.