BMPRO BatteryPlus35-II-HA High Amp Power Management System
BMPRO has replaced the entry-level BatteryPlus35-II-SI with a genuine high-amp version — same basic footprint and mounting, but with real MPPT solar regulation and a stronger AC charger behind it, built specifically around supporting a full lithium conversion rather than just protecting one.
Key features
- 35A total output current for 12V loads
- 30A multi-stage AC (mains) battery charger — up from the outgoing SI model's 20A
- Genuine MPPT solar regulation at 30A (420W, 25V max input), not PWM
- Distribution board with 12×10A and 2×15A fused DC outputs, plus a 40A uncontrolled +BRK output for always-on accessories
- CAN bus connection to BMPRO's Trek battery monitor or Odyssey touchscreen
- Compatible with lead-acid and lithium (LiFePO4) — chemistry is set via an OdysseyLink104 or Trek Display accessory, not a switch on the unit itself
RV use case
This is squarely for owners doing a genuine lithium conversion rather than protecting an existing lead-acid setup — the jump from PWM to real MPPT solar regulation, and from 20A to 30A AC charging, matters when you're relying on faster turnaround at a powered site or want to get more out of a rooftop array. The 40A +BRK output is a genuinely useful practical touch, giving accessories like sway control or a trailer breakaway system a dedicated feed that doesn't sit behind the main battery protection circuit.
Pros
- Real MPPT solar regulation rather than the outgoing model's PWM, meaningfully more efficient off a rooftop array
- Stronger 30A AC charging suits faster recovery on powered sites
- Dedicated 40A +BRK output is a sensible inclusion for always-on safety accessories
Cons
- Switching battery chemistry requires an additional BMPRO display or tablet accessory, not a simple onboard switch
- Solar input voltage ceiling (25V) still limits how panels can be wired together
- It's a charging and protection unit, not a DC-DC charger — a separate unit is still needed for alternator charging
Best for
Owners doing a full lithium conversion who want genuine MPPT solar and stronger AC charging than the entry-level SI model offered, particularly if already using BMPRO's Trek or Odyssey display ecosystem.
Verdict
This is the version of the unit a genuine lithium conversion actually wants — real MPPT and meaningfully more AC charging headroom than the model it replaces, at the cost of needing an extra display accessory to fully configure it.
BMPRO BatteryPlus35-II-HA High Amp Power Management System
Shown alongside the OdysseyLink105, display and MiniBoost accessories
The Odyssey touchscreen display, showing tank and lighting controls
Shown with the Odyssey display, part of the BMPRO smart ecosystem