How to Motorize a Pool Blanket Reel: A 5-Minute Retrofit Guide

By the Lux Pool Team · Published 2026-05-27 · ~10 min read

If you're cranking a solar blanket on and off your pool by hand every day, you already know the problem isn't the cover — it's the reel. A manual hand-crank reel works, but rolling and unrolling a 20×40 blanket twice a day is a chore most pool owners abandon by mid-July. The blanket ends up in a pile by the equipment pad, the pool loses 5°F overnight, and you're paying to heat water that's evaporating into thin air.

The good news: you don't need to replace your reel. You can motorize the one you already own in about five minutes with the right kit. This guide walks through exactly how that retrofit works, what tools you need, and the common gotchas that trip people up.

Why motorize an existing reel instead of buying a new one

A new full reel-and-cover system can run $1,500 to $4,000 by the time it's shipped, assembled, and the old one hauled away. A motor retrofit kit slides into the existing tube of your current reel and replaces just the hand crank. You keep the tubes, the legs, the wheels, and the blanket clips you already own.

That matters for three reasons:

• Cost. A motor kit costs a fraction of a full new system — you're paying for the motor, battery, solar panel, and remote, not duplicate aluminum tubing and welded stainless legs.
• Speed. A retrofit is one screw out, slide a motorized shaft into the existing tube, one screw back in. About five minutes of work. A full reel replacement is a half-day install with a level, a tape measure, and sometimes new concrete anchors.
• Waste. Your old reel still works mechanically — the only "broken" part is your shoulder after the 40th cranking session of the summer. Throwing the whole thing away to fix that is wasteful and expensive.

The motorized retrofit category has grown a lot since 2020, and the bar to do it right is now well understood: a battery-driven motor, a small solar panel to keep it charged, and a remote to operate it from poolside.

What a motor kit actually replaces

A typical solar blanket reel has these parts:

• One or more aluminum tubes that the blanket wraps around (joined in the middle for long pools)
• A pair of stainless steel T-leg uprights with wheels at the base
• A hand crank on one end of the tube
• Blanket clips or straps that grip the leading edge of the cover

The retrofit only touches one of those: the hand crank. A motorized kit consists of:

1. A motor housed in a stub-shaft that slides into your existing tube where the crank used to be
2. A solar-battery-unit (we call it the SBU) — a small box mounted near the reel that contains a lithium-ion battery, charge controller, and either an integrated or external solar panel
3. A 433 MHz handheld remote with a CR2032 coin-cell battery and pry-open child-safety design
4. One or two adapter sleeves to make the motor shaft snug inside whatever inner diameter your existing tube has (more on adapter sizing below)

That's the whole list. No cords across the deck, no hoses, no AC outlet near the pool, no electrician.

Tools you'll need

That's the whole kit. No drilling, no anchoring into the deck, no rewiring.

Step-by-step: motorizing your reel

1. Photograph and measure your tube

Before ordering anything, take a photo of one end of your aluminum reel tube with a piece of masking tape stretched across the inside opening. Mark the tape where the tube wall sits on each side. That measurement is your inner diameter and it determines which adapter you need.

Standard motor kits ship with a 3" adapter included. If you measure 2.25", 2.5", 2.75", or 4", you'll need a different adapter — ask your kit supplier before ordering and they'll swap it. (See our adapter sizing guide for a full breakdown.)

2. Unscrew the existing hand crank

Most hand cranks are held in with a single screw at the end of the tube. Back it out, slide the crank assembly straight out. Set it aside — you may want it as a manual backup if the motor ever needs service.

3. Slide the motor shaft into the tube

The motor sits in a stub that's the same diameter as the crank you just removed (assuming the adapter is right). Slide it in until the housing seats against the tube end. The fit should be snug but not forced — if you're hammering, the adapter is wrong.

4. Re-install the screw

The same screw you removed in step 2 goes back into the same hole, now locking the motor shaft in place instead of the crank.

5. Mount the solar-battery-unit

The SBU sits on one of the T-leg uprights and clamps in place — no drilling required. Position it so the solar panel faces roughly south (or whichever direction gets the most sun in your yard).

6. Power up and pair the remote

Flip the white power switch on the SBU to ON. The remote is already paired at the factory — press the up arrow to roll the blanket in, the down arrow to roll it out. A 20×40 cover rolls up in about 90 seconds.

Tube fit and adapter sizes

This is the single most common reason a motor kit "doesn't fit." The tube inner diameter varies by reel manufacturer, and there are at least five common sizes in the residential pool market.

The OD/ID of our standard 3" adapter is approximately 73.4 mm. The 4" SLS PA adapter is a $183.81/pair custom order — only needed for wide commercial rollers.

Compatible reels and the ones to avoid

For a motorized retrofit, the reel needs two things: a hollow aluminum tube the motor shaft can slide into, and a stationary outer housing the motor can push against. Most stainless-T-leg residential reels meet both. Specifically compatible:

• Vingli 18-ft reels (US ASINs B09SGCHWD2 / B01MDLU2GG)
• Vingli 21-ft Canada (B0CRR1Z7Y9 / B095PKFB62)
• Rocky's Easy Roller 24-ft+ (custom adapter, made-to-order)
• HydroTools / SwimLine commercial 28" Truss Base (very large — we route to custom solutions for these)

Not compatible, and we politely decline these every time:

• Feherguard reels — no standard adapter matches their tube system
• Autopoolreel.com retrofit kits — custom too complex for a universal motor swap

If you have one of those, we'll suggest a different motorized brand rather than overpromising.

DIY a motor from scratch? Here's why we don't recommend it

We get asked this a lot — "can I just put a drill motor and a marine battery on it?" Technically yes. Practically, here's what people miss:

• Torque control. A blanket wrapped around a 20-ft tube has a wildly varying torque load — tight at the start, easy in the middle, jamming at the end if the blanket clips snag. A drill motor doesn't have soft-start or torque cutoff. You'll either burn out the motor or snap a tube weld.
• Battery management. A lithium-ion battery without a proper BMS (battery management system) is a fire hazard — especially outdoors near a chlorinated pool. We've seen DIY rigs where the customer used a SLA car battery in a plastic tote. It worked for one summer. The next April it was sulfated and dead.
• Weather rating. Open relays and unsealed motor terminals fail in 6 months of pool deck humidity. Sealed marine-grade hardware costs $$$.
• Remote interference. Cheap 433 MHz receivers will activate randomly from your neighbor's garage door, LED yard lights, or a kid's RC toy. You want a receiver with proper code-rolling.

You can absolutely build something. Most people who try end up buying a kit by the second summer.