Victron BlueSolar MPPT Charge Controller — 75/10, 75/15, 100/15 & 100/20

The same fast MPPT charging as the SmartSolar — without built-in Bluetooth. The Victron BlueSolar MPPT 75/10–100/20 uses the identical charging hardware to the SmartSolar range: ultra-fast Maximum Power Point Tracking, a multi-stage adaptive algorithm, and up to 98% efficiency. The one difference is that Bluetooth isn't built in. Add a VE.Direct Bluetooth Smart dongle for wireless setup and monitoring in VictronConnect, or configure it over VE.Direct with a GX device or the MPPT Control display. Want Bluetooth out of the box? Choose the SmartSolar version.

This range covers the small-to-midsize end of the line in four models — 75/10, 75/15, 100/15, and 100/20 — spanning 10–20 A of charge current and 75 V or 100 V of PV input, with automatic 12/24 V operation (the 100/20 adds 48 V). Every model is UL 1741 and IEC 62109-1 certified and can drive a load directly through its built-in load output.

Who the BlueSolar MPPT 75/10–100/20 is built for

• Budget-conscious DIY builds — the same charging performance as the SmartSolar at a lower price when you don't need built-in Bluetooth.
• GX-monitored systems — if you already run a Cerbo GX, you configure and monitor over VE.Direct anyway, so the dongle is optional.
• RVs, vans, boats, and off-grid cabins — compact, vibration-tolerant, with a load output to run lights or a fridge directly.
• Installers — VE.Direct, GX integration, and full remote management on VRM.

Why this is the BlueSolar MPPT, not just another charge controller

Ultra-fast Maximum Power Point Tracking

The BlueSolar MPPT recalculates the panel's optimal voltage/current point many times a second. In changing light it harvests up to 30% more energy than a PWM controller and up to 10% more than a slower MPPT — more of the sunlight that hits your panels ends up in your battery.

Configure over VE.Direct (or add Bluetooth)

The VE.Direct port connects to a GX device such as a Cerbo GX or the MPPT Control display for setup and monitoring, and on to Victron's VRM portal. For wireless setup from your phone, add a VE.Direct Bluetooth Smart dongle — it gives you the same VictronConnect experience as a SmartSolar.

Intelligent multi-stage charge algorithm

Automatically steps through bulk, absorption, and float with a profile matched to your battery chemistry — lithium, AGM, gel, or flooded — using automatic voltage selection. It can even revive a fully discharged battery and reconnect to a lithium battery whose internal protection has tripped.

BatteryLife battery management

When short days mean the controller can't fully recharge the bank, a lead-acid battery can get stuck cycling between partial charge and empty — which destroys it in weeks. The BatteryLife algorithm nudges the load-disconnect level day by day until the battery reaches a near-full recharge about once a week, extending its life.

Intelligent load output

The 75 and 100/15 models include a load output you can wire devices to directly, with a configurable low-voltage disconnect (or BatteryLife management) so a load can't flatten your battery. The output is short-circuit proof. On the 100/20's 48 V mode the load terminal drives a relay rather than switching the load directly.

SafetyShield+ protection

Temperature-compensated charging, over-temperature protection, and safeguards against PV short circuits, reverse polarity, and reverse current are all built in.

Available models

All four share the same charging smarts — the difference is how much PV voltage and charge current they handle. Match the model to your panel string voltage and the charge current your battery bank can accept.

Model	Max PV voltage	Charge current	System voltage	Max PV power (12V / 24V / 48V)
MPPT 75/10	75 V	10 A	12 / 24 V	145 W / 290 W / –
MPPT 75/15	75 V	15 A	12 / 24 V	220 W / 440 W / –
MPPT 100/15	100 V	15 A	12 / 24 V	220 W / 440 W / –
MPPT 100/20	100 V	20 A	12 / 24 / 48 V	290 W / 580 W / 1160 W

Not sure which model fits your array? Use Victron's MPPT sizing calculator, or book a system consultation and our ABYC-certified Advisors will size it with you.

Full technical specifications

PV input

Max PV open-circuit voltage: 75 V (75 series) / 100 V (100 series). Max PV short-circuit current: 13 A (75/10), 15 A (75/15 & 100/15), 20 A (100/20). To start, PV voltage must exceed battery voltage + 5 V; thereafter the minimum is battery + 1 V.

Battery / charge

Battery voltage: 12/24 V auto-select (100/20 also 48 V). Rated charge current: 10 / 15 / 15 / 20 A. Absorption: 14.4 / 28.8 V (57.6 V on 48 V), adjustable. Float: 13.8 / 27.6 V (55.2 V on 48 V), adjustable. Charge algorithm: multi-stage adaptive. Temperature compensation: -16 mV/°C (12 V) / -32 mV/°C (24 V).

Load output

Max continuous load current: 15 A (75/10, 75/15, 100/15); 20 A at 12/24 V and relay-driven (1 A) at 48 V on the 100/20. Low-voltage disconnect/reconnect adjustable, or BatteryLife. Short-circuit proof.

Efficiency, protection & environment

Peak efficiency: 98%. Self-consumption (load off): roughly 10 mA at 12 V / 8 mA at 24 V. Protection: output short circuit and over-temperature. Operating temperature: -30 to +60 °C (full rated output up to 40 °C). Humidity: 95%, non-condensing.

Communication & enclosure

VE.Direct data port (add a VE.Direct Bluetooth Smart dongle for wireless). Colour: blue (RAL 5012). Power terminals: 6 mm² / AWG 10. Protection category: IP43 (electronics), IP22 (connection area). Weight: 0.5 kg (75/10 & 75/15), 0.6 kg (100/15), 0.65 kg (100/20). Dimensions (h×w×d): 100×113×40 mm (75 series), 100×113×50 mm (100/15), 100×131×60 mm (100/20). Safety: EN/IEC 62109-1, UL 1741, CSA C22.2.

Recommended accessories

• VE.Direct Bluetooth Smart dongle — adds wireless VictronConnect setup and monitoring.
• Cerbo GX — full remote monitoring and control via the VRM portal.
• VE.Direct cables — wire the controller to a GX device or VE.Direct accessory.
• Lithium & AGM batteries — pair the controller with the right bank for your system.
• VE.Direct non-inverting remote on/off cable — switch the charger from an external signal.

Installation and sizing help

Sizing an MPPT is about matching panel string voltage to the controller's PV window and the charge current to your battery bank. Two references that help:

• Victron MPPT sizing calculator — check a panel/controller combination.
• Victron Wiring Unlimited — the wiring and fusing reference.

Prefer to talk it through? Our ABYC-certified Advisors are at support@bluemarine.com or (800) 628-6306.

Frequently asked questions

BlueSolar or SmartSolar — what's the difference?

The charging hardware is identical. SmartSolar has Bluetooth built in; BlueSolar does not. With a BlueSolar you add a VE.Direct Bluetooth Smart dongle for wireless, or configure over VE.Direct with a GX device or MPPT Control display. If you want Bluetooth out of the box, buy the SmartSolar.

Do I need the dongle?

Only if you want wireless setup/monitoring and don't have a GX device. If you run a Cerbo GX (or use the MPPT Control display), you configure and monitor over VE.Direct without the dongle.

Which model do I need?

Pick by your panel array's open-circuit voltage (stay under 75 V or 100 V) and the charge current your battery can accept. Use the MPPT calculator above, or ask us — oversizing PV voltage is the most common mistake.

Can it charge lithium (LiFePO4) batteries?

Yes. There's a dedicated lithium profile, plus presets for AGM, gel, and flooded, and a fully custom option.

Can I power loads directly from the controller?

Yes — these models have a load output with low-voltage disconnect to protect the battery. On the 100/20 in 48 V mode the load output drives a relay rather than switching the load directly.

What warranty does it carry?

A 5-year limited Victron warranty, upgradable to 10 years for an additional 10% of the purchase price. We're an authorized Victron distributor, so your warranty is fully supported.

Why buy your BlueSolar MPPT from Blue Marine

• Authorized Victron Energy Distributor — genuine product, fully supported warranty.
• ABYC-certified Advisors — real solar sizing help, not a call center.
• Free US shipping over $49 from our Seattle warehouse.
• 60-day hassle-free returns.
• Local pickup available in Seattle, WA.
• Custom quotes & full system design — request a quote for a complete build.
• Dealer & installer program — apply here for trade pricing.