Votronic MPP Duo solar charge controller

MPP solar controller for high-quality motorhomes, caravans and the marine sector.

Votronic Solar controllers of the "MPP" (Maximum Power Point) series with "IU1oU2" charging characteristic are connected as a link between the solar panel(s) and battery(ies). With MPP technology, the controller automatically determines the maximum power output (MPP) of the solar modules several times per second.

It then transforms the excess voltage of the solar module into a higher charging current for the battery (realized by high-frequency switching controller technology with high efficiency). This additional charging current ensures shorter charging times and the best possible power utilization of the solar system.

The MPP solar controllers operate fully automatically, are maintenance-free and offer the following functions:

- MPP charging current increase of 10 % to 30 % (efficiency > 95 %) compared to conventional controllers thanks to the use of state-of-the-art controller technology (microprocessor). The increase in performance is particularly noticeable at cooler times of the year and e.g. during high fog conditions, low and diffuse lighting (wintering).

- 8 switchable charging characteristics for optimum charging of lead gel/dryfit, AGM/fleece or acid/wet batteries as well as LiFePO4 batteries (see Table 1).

- The charging voltage is free of peaks and regulated in such a way that the batteries cannot be overcharged.

- Two battery charging outputs: Automatic charging of the main supply on-board battery (BORD I) and support charging and charge retention (max. 1 A) of the vehicle starter battery (Start II) with protection against overcharging.

- Monitoring-free charging: Standard protection against overload, overheating, reverse polarity and battery reverse discharge (if solar power is too low, e.g. at dusk, at night, etc.).

- Parallel/buffer operation: Compliance with charging regulations even when consumers are operating at the same time.

- Overcharge protection: Regulates the charging current of the battery back if there is too much solar power and the battery is full, ensures that the battery is charged to the highest possible level by immediately recharging when power is consumed.

- "IU1oU2" charging characteristic: Defined charging voltage increase (U1) prevents harmful acid stratification (lead) and ensures equalization charging of the individual battery cells (lead and lithium), followed by automatic trickle charging (U2).

- Charging cable compensation: Voltage losses on the charging cables are automatically compensated for.

- On-board power supply filter: Problem-free parallel operation with wind and motor generators, mains chargers, alternators, etc.

- Measuring output for EBL, possibly existing electrical block in the living area of the vehicle: Enables the convenient use of a (solar) current display built into the electrical block to check the solar system.

- "AES" switching output (MPP 250, MPP 350 and MPP 430 only): Causes refrigerators with "AES" (Automatic Energy Selector, Electrolux / Dometic) to switch automatically from gas to 12 V operation if there is a permanent abundance of excess solar power.

- Connection for battery temperature sensor (Art.-Nr. 2001): In the case of lead batteries, the charging voltage is automatically adjusted to the battery temperature, resulting in a better full charge of the weaker battery in cold weather and avoiding unnecessary battery gassing and stress in summer temperatures. LiFePO4 batteries: Battery protection at high and especially low temperatures. Highly recommended if the battery temperature can fall below 0°C during operation.

- Ready to plug in for connection of various Votronic solar display devices for optimum control of the system: z.B. LCD Solar Computer S: LCD display with display range: battery voltage, charging current, charging power, stored capacity and energy (V, A, W, Ah, Wh), Art.-Nr.: 1250.