MPPT converts surplus voltage into amps; PWM throws it away · review
Victron Energy SmartSolar MPPT 100/20, 20 A, 100 V PV maximum, 12/24/48 V review
A 20 A SmartSolar controller whose model number states its limits — 100 V input, 20 A output — with a multi-stage adaptive algorithm, battery presets and integrated Bluetooth.
The bottom line The smallest current in this family and the only one whose limits are in its name, with custom battery profiles and integration beyond a phone application. It costs several times its neighbours and delivers a fifth of their current.
A 20 A controller that states its own boundaries in its model number.
The naming convention
100/20 means 100 V maximum PV input and 20 A maximum output current. Every string calculation this controller needs is answerable from the product name. Four of the five MPPT controllers in this family publish no input ceiling anywhere on their page.
The profiles
Presets for common battery types, and fully custom profiles for anything else. That second half is what separates a controller that works with the battery you have from one that works with the battery it expects. A lithium pack whose maker specifies particular absorption and float voltages can be given them.
The monitoring
Integrated Bluetooth with VictronConnect, and connection to a GX device for a wider installation. That is the difference between checking a controller on a phone and having it report into a system alongside a battery monitor and an inverter.
The trade
20 A against 40 to 100 A elsewhere in this family, at a considerably higher price. What is bought is the documentation, the profiles and the integration rather than the current.
What the listing still omits
An efficiency figure, an enclosure rating and wiring sizes — all three of which Victron publishes in its own datasheet rather than here.
Availability
German, French, Italian and Spanish Amazon stores quoted 71 € to 77 € when this page was compiled.
American and British Amazon stores carry it too, priced in their own currency, which the euro range above deliberately omits.
These figures are what Keepa reported on the day this page was last updated. Availability and pricing move without notice.
Prices quoted in this text were read on 16 September 2026. The live price is at the top of the page.
What it gets right, and what it leaves out
Strengths
The model designation itself states the two limits — 100 V input, 20 A output — so no string can be miscalculated
Custom battery profiles rather than only presets, which matters for an unusual bank
Integration with a wider monitoring system through a GX device, not only a phone application
Compromises
20 A is the lowest charge current in this family, on the highest price
No efficiency figure published in the listing
No enclosure rating and no wiring sizes
Specifications
Charge current
20 A, stated in the model designation 100/20
Maximum PV voltage
100 V, stated in the model designation — the limits are in the product name itself
Efficiency
Absent as a figure; a multi-stage adaptive charging algorithm is named in the first bullet
Battery profiles
Presets for common battery types plus fully custom profiles, third bullet — the only controller here to offer user-defined profiles
Monitoring
Integrated Bluetooth with the VictronConnect application, and connection to a Victron GX device, fourth bullet
Wiring sizes
Nowhere in the listing
Enclosure
Nowhere in the listing
Amazon reference
B075NPQHQK (same reference on 6 Amazon marketplaces)
EAN
0810019980657
Questions owners ask about this one
What does “100/20” actually tell me?
The maximum PV input voltage and the maximum output current: 100 V and 20 A. Putting the limits in the name means a string can be checked against the product before the datasheet is opened, which four of the five MPPT controllers here make impossible.
Why do custom battery profiles matter?
Because presets cover common chemistries at common voltages. An unusual bank — an older lead type, a lithium pack with specific limits from its maker — needs the absorption voltage, float voltage and current limits set to its own figures, and only this controller offers that.
100 A charge · maximum PV voltage not published · tracking efficiency not less than 99 % · sealed, gel, flooded and LiFePO4 · LCD with single-touch settings and seven modes · wiring sizes not published · described as waterproof without a rating
A 100 A controller for 12 to 48 V systems with dual 5 V USB ports, single-touch settings and protection against over-voltage, over-current, over-charge and deep discharge.
Best for: An outdoor or semi-exposed installation where the protections list is the deciding factor.
60/80/100 A selectable · maximum PV voltage not published · MPPT algorithm named, efficiency not published · lead-acid and lithium · backlit LCD with live data and fault codes · wiring sizes not published · three-layer protection
A controller selectable at 60, 80 or 100 A for 12 to 48 V systems, with seven intelligent modes including dusk-to-dawn operation for street lighting.
Best for: A street lighting or garden installation where the timing modes do most of the work.
100 A charge · 100 V maximum PV input · tracking efficiency not less than 99.5 % · sealed, gel, flooded and LiFePO4 · LCD with clock and seven modes · wiring sizes not published · enclosure not rated
A 100 A controller for 12 to 48 V systems with a published 100 V PV input ceiling, whose listing describes it as combining MPPT and PWM charging technology.
Best for: A 48 V off-grid array whose string voltage is already known to sit under 100 V.
