Which setup is right for your home brewery?

The question I hear most often from people getting into electric brewing is some version of: should I go all-in-one, or build something more modular? It’s a fair question, and the honest answer is that it depends on what you want out of a brew day. Both approaches make excellent beer. They just ask different things of you.

I’ve brewed on both extensively, including a recent side-by-side brew day where we ran an all-in-one and a modular system simultaneously on the same high-gravity lager recipe. The results were instructive. Here’s what actually matters when you’re choosing between them.

What Is an All-In-One Electric Brewing System?

An all-in-one electric brewing system puts everything in one place: the kettle, heating element, pump, and controller are all integrated into a single unit. You fill it, plug it in, program your mash and boil schedule, and the system walks you through the rest. The built-in LCD panel lets you navigate between manual and auto modes, and most systems support programmable step mashing with multiple temperature stages.

The biggest selling point is simplicity. There’s real comfort in fixed plumbing, a compact footprint, and not having to think about how your components connect. On the 120v version, expect about 60 minutes to heat from ground water temperature to mash temp, then another 45 minutes to reach a boil. That’s not fast, but it’s consistent.

One practical note: getting a vigorous boil at 120v requires keeping the lid partially covering the kettle. Testing has consistently shown this doesn’t affect beer quality, but it’s something to know going in. Kettle insulation can also help, especially at higher elevations or in cold spaces.

The grain basket on most all-in-ones uses a solid-walled design with mesh on the bottom and a top screen to hold the grain bed in place. It works, though you lose a bit of mash efficiency compared to a fully mesh basket. The fix is simple: add a bit more grain upfront and you’re back on target. On a recent high-gravity lager brew, our all-in-one came in at a gravity of 1.059 against a target of 1.074. The gap is real and predictable, which means it’s manageable.

The Clawhammer 10-gallon all-in-one electric brew system is purpose-built around this approach. It’s a solid entry point for anyone who wants a true all-grain setup without piecing together a rig from scratch.

What Is a Modular Electric Brewing System?

A modular electric brewing system uses the same core components but keeps them separate. The kettle is just a kettle. The controller is its own unit. The pump runs independently. Hoses and fittings connect everything, and you can swap out any single piece without disrupting the rest.

The practical upside is power. A modular setup can run a 5,500-watt, 240v heating element, which heats water roughly three times faster than a typical 120v all-in-one. A 240v modular system can reach 152°F in around 20 minutes and hit a rolling boil in another 17. That changes the shape of your brew day considerably.

The tradeoff is that with that much heat, you need to pay attention. Running a 5,500-watt element at 100% once your wort is in will give you a boil-over almost immediately. The controller lets you dial down power output, so dropping to around 50% once you’re rolling is the right move and adjusting from there based on what you see.

The grain basket on modular systems typically uses a full-mesh design, which gives wort more contact with grain and translates directly to better extraction efficiency. It also means you can crush your grain finer without worrying about flow restriction issues, which is a real advantage on high-gravity recipes.

Modular setups also support accessories more naturally. During our side-by-side lager brew, we ran a whirlpool arm on the modular kettle. The arm creates a circular flow that pulls hops, proteins, and grain debris into a cone at the center of the kettle, so less of that material transfers into the fermenter. It outperforms a hop spider for late additions and whirlpool hops.

How Do the Controllers Compare?

Controllers are where the gap between systems has closed significantly in recent years. Both all-in-one and modular systems now offer automated brew day programming: set your mash temperature, rest timing, and hop addition reminders ahead of time, and the controller handles temperature maintenance from there.

One feature that genuinely improves the brew day is scheduled preheat. The Clawhammer modular touchscreen controller lets you program the system to start heating water at a specific time, so you wake up to strike-ready water. That removes the most tedious waiting period from the whole process. The all-in-one system doesn’t currently offer this.

The modular controller also has a meaningful long-term advantage: it can be upgraded from 120v to 240v without replacing the entire unit. It’s an internal swap of the receptacle and power cord. The Clawhammer 120v digital electric homebrew system shows what the full modular setup includes.

Recirculation and Wort Chilling

Both system types recirculate wort through the grain bed during the mash. Continuous recirculation keeps mash temperature consistent throughout the rest and helps convert starches more evenly. The hardware looks different between systems, but the function is the same.

Where systems diverge is in wort chilling. All-in-one systems usually include an immersion chiller or flat plate chiller. Immersion chillers work fine: lift and move the coil periodically so you’re not just chilling the same pocket of wort. Plate chillers are faster but require thorough cleaning since they can’t be fully disassembled.

Modular systems pair naturally with a counterflow wort chiller, which runs cold water in the opposite direction of hot wort through separate channels. For lagers, where you’re targeting a pitch temperature of 48–52°F, chilling speed and consistency genuinely matter. If you’re planning to brew a lager, our lager brewing guide covers the fermentation temperature and yeast considerations in detail.

Mash Efficiency: What the Numbers Actually Mean

The short version: modular systems with full-mesh grain baskets extract more sugar from the same amount of grain. In a direct comparison on the same recipe, the modular system hit the target gravity of 1.074 while the all-in-one landed at 1.059. That’s a meaningful difference on a high-gravity beer.

This doesn’t make all-in-one systems bad. It makes them predictable. Once you’ve run a few batches, you know your system’s efficiency and build your recipes around it. Bump the grain bill a pound or two, dial in your numbers, and you’re hitting gravity targets reliably.

Where it matters more is on high-gravity beers, where you’re already pushing the grain basket close to capacity. A system running at 65% efficiency on a recipe designed for 75% is going to struggle. Knowing your efficiency going in means you plan for it rather than chasing your numbers on brew day.

Grain crush also plays a role. Finer crush means better efficiency, but the solid-walled basket on all-in-one systems can run into flow restriction issues with a very fine grind. The full-mesh basket on modular systems handles a finer crush without the same risk. For most beers this won’t change your life, but for big grain bills it’s worth knowing.

Cost, Longevity, and the Long-Term View

All-in-one systems are less expensive to get started with. Modular systems cost more upfront. That’s the simple version.

The longer version: modular systems are built to last because individual components can be replaced as needed. If the pump fails on a modular rig, you buy a pump. If the controller has an issue, you address the controller. Nothing goes in the trash because one part died. All-in-one systems have most components built in, which simplifies things but also means a failed component can sideline the whole system.

There’s also the upgrade path to consider. As your brewing evolves toward bigger batches, higher-gravity recipes, and lager fermentation, a modular system can grow with you. The 120v-to-240v controller upgrade is one example. Adding a counterflow chiller, a better pump, or a whirlpool arm are others. An all-in-one system has more limited upgrade options by design.

Which System Should You Choose?

If you’re just getting into all-grain electric brewing, the all-in-one is the right call. It teaches you the process without overwhelming you with variables. The brew day is manageable, the footprint is small, and the learning curve is gentle. Once you have some batches under your belt and start wanting more power, better efficiency, or more flexibility with accessories, that’s when modular starts making sense.

If you already know the process and you’re setting up a system you want to use for years, go modular. You’ll get better efficiency, more power, more flexibility, and a system you can actually repair rather than replace.

Both will make beer you’re proud of. The choice is mostly about where you are in your brewing life and how much you want to tinker.