TURBRO RV AC Soft Start Kit S15 Plus — 100–240V Waterproof Soft-Starter, Reduces Startup Current

The TURBRO S15 Plus RV AC Soft Start Kit reduces compressor start-up current so your RV air conditioner and other appliances start smoothly on limited power.

Designed for recreational vehicles, campers, and travel trailers, the S15 Plus soft starter helps avoid tripped breakers and generator overloads by cutting inrush current during AC compressor startup. Its wide 100–240 V/60 Hz compatibility, IPX5 waterproof protection, and clear three-light status indicators make it a flexible retrofit for many rooftop air conditioners and small generators.

How does the S15 Plus reduce power demand during AC startup?

The S15 Plus limits the initial surge that the compressor motor draws when it starts, reducing peak startup amperage by roughly 60–75%. That smaller inrush lets the air conditioner spool up gradually rather than attempting a full-power start that can trip breakers or overtax generators.

• Reduces startup current by 60–75% to prevent breaker trips
• Enables smoother motor acceleration for less mechanical stress
• Helps other onboard appliances keep running during AC startup

Will this soft starter work with my RV electrical setup and generator?

The S15 Plus is built to work across a broad voltage range (100–240 V/60 Hz), so it fits many systems beyond the usual 115 V soft starters. It supports non-inverter RV ACs up to about 15,000 BTU and is well-suited for small portable generators such as Honda 2200 and similar 2 kW-class units when combined appropriately.

• Compatible with ACs up to 15,000 BTU and non-inverter units
• Operates from 100–240 V/60 Hz for flexible installations
• Can enable two ACs on a shared 30A hookup when total running load is under 30A (requires two soft starters)

How difficult is installation and what should I remove first?

Installation follows a straightforward 6-wire wiring method: disconnect the compressor and control box harnesses, then wire each to the soft start module per the included diagram. Before installing, you must remove original starting components — leaving PTCR, start capacitors, or start relays in place can prevent proper startup.

• Six-wire connection between compressor, control box and soft starter
• Remove existing start components (PTCR, start capacitor, start relay) to avoid conflicts
• Follow the wiring diagram or contact support if unsure

What durability and comfort benefits does this unit add inside the RV?

The S15 Plus is built for outdoor vehicle use with an IPX5-rated waterproof shell and an epoxy-sealed circuit board, offering better resistance to moisture and vibration. In operation it reduces compressor noise and vibration, contributing to a quieter, more comfortable environment on board.

• Dual waterproofing (outer shell IPX5 + epoxy-sealed PCBA)
• Lower startup noise and vibration for quieter runs
• Three indicator lights for quick status checks during use

Who is this for? The TURBRO S15 Plus is aimed at RV owners, vanlifers, and trailer users who rely on limited shore or generator power and need reliable air conditioning without frequent breaker trips. It’s a good fit for vehicles with non-inverter rooftop ACs up to 15,000 BTU, owners of small portable generators, and anyone wanting quieter compressor starts and improved protection for onboard appliances. If you’re unsure about compatibility, remove original start devices before installing and contact TURBRO support for confirmation.