A Battery
a Month

📅 The Backup You Buy Like Groceries

Most backup power is sold the way cars are sold. One large number, one large decision, and a man in a polo shirt explaining the financing.

That is no good to a great many of the people who need it most. A widow on a Social Security check does not have five thousand dollars sitting in a drawer. She may very well have a hundred or two left over at the end of the month, most months, if nothing breaks.

So here is a different question. Could somebody buy a real backup the way she buys groceries? A piece at a time, out of the monthly money, with no loan and no installer — and end the year with something that actually keeps her house going when the lights go out?

The answer is yes. But only if the pieces are chosen with that in mind from the very first one, because most backup systems are not built to be bought that way at all. They are built to be bought all at once, and a third of one is worth nothing.

This page gives you two ways to do it. The first is the one to use if you are doing this by yourself. The second is cheaper, and it needs a helper who is handy with tools.

✅ Three Tests Every Piece Has to Pass

Before anything goes on the list, it has to pass three tests. They sound fussy. They are the whole reason this plan works.

One: it has to work on its own the day it comes home. The power does not wait for you to finish. If the storm comes in month three, the pieces from months one and two have to be doing something useful, not sitting in a closet waiting for the rest of the set. A plan that only works when it is complete is a plan that fails whenever the weather is early.

Two: no wiring. Nothing that has to be joined with a wrench, nothing that goes into the walls, and nothing a landlord needs to hear about. Everything plugs in with an ordinary cord, the way a toaster does.

Three: nothing she cannot manage. That rules out a surprising amount of what is sold as home backup. The big rack batteries weigh about ninety pounds each. A lead-acid battery is fifty or sixty. Anything in this plan should be something one careful person can move on a hand truck or a little cart, and even then, the first rule on this site holds — ask for help, and talk to your doctor before taking on any lifting at all.

Hold the usual answers up against those three tests and most of them fall over at once. A standby generator fails the first and the second. A wall of rack batteries fails all three. What passes is smaller, and more ordinary, and it is sold in the same aisle as the camping gear.

🔌 Way One: A Power Station at a Time

A portable power station is a battery, an inverter and a charger, all packed into one box with a handle on top. It charges from a wall outlet. It has ordinary household outlets on the front. You plug a refrigerator into it and the refrigerator runs. That is the entire instruction manual, very nearly.

For this plan, it is the right piece, because every single one passes all three tests. It works the day it arrives. It needs no wiring. And a one-kilowatt-hour station, which is the size to buy, typically weighs somewhere around twenty-five to thirty-five pounds — heavy enough to respect, light enough to roll on a little cart.

The trick is to stop thinking of them as one big system and start thinking of them as a small battery for each job. One station runs the refrigerator. Another runs the bedroom. Another keeps the internet up. None of them depends on any of the others, and if one fails, the rest never notice.

What to look for on the box

This next bit is a checklist and it reads like one. It is kept plain on purpose, because these are the words to look for on a label, and a label is no place for anybody's jokes.

📋 The Order to Buy Them In

The order matters more than the brand. Each month's station goes to the job that would hurt most to lose, and the jobs run downhill from there.

Two things are worth doing before the first station, because they cost next to nothing. Put rechargeable night lights in the hallway, the bedroom and the bathroom — they glow in the ordinary way and carry on by themselves when the power fails, so the house is never a black maze with a rug in it (our night lights page). And put a battery-powered carbon monoxide alarm outside the bedroom, because the day a generator enters this story, it becomes the most important thing in the house.

If a station a month is more than the budget allows — and for plenty of people it will be — buy one every other month, or one a season. The order stays the same. It simply takes longer to reach the bottom of the table, and every step you have taken is already working.

By the end of it, four stations is about four kilowatt-hours of storage spread through the house. That is a refrigerator, a bedroom and a living room carried through a night with room to spare, and, with some way to refill them, carried through a good deal more than one night.

💵 What One Costs This Month

Here are three that were on Walmart's website in September 2026, all about the right size and all lithium iron phosphate. Check the "sold and shipped by" line on any listing, because on Walmart.com it is often the maker's own store rather than Walmart itself, and that decides who handles a return. They are examples, not endorsements, and the prices will have moved by the time you read this.

So the going rate for a good one-kilowatt-hour station is somewhere around $450 to $550, and four of them over four months is somewhere around $1,800 to $2,200.

Two honest notes on that.

First, the "was" prices are real, and so are the sales. These stations go on sale often and deeply. A person buying one a month has an advantage nobody else in the store has: she does not have to buy this month. If the price is high, she can wait for the next sale and buy two. That is a patience discount, and on a fixed income it is worth more than a coupon.

Second, per kilowatt-hour, this is the dear way to do it. Every one of those boxes carries its own inverter, its own charger and its own safety testing, and you pay for all of that four times over. That is precisely what makes it safe for one person to set up with no tools — but it is not the cheapest storage there is. The cheaper way is next.

If you would rather search than walk the aisles: 1,000 Wh LiFePO4 power stations with UPS mode · folding solar panels for power stations · rechargeable power-failure night lights · battery-operated CO alarms.

☀️ Filling Them Back Up

A battery is a bucket. It does not make anything. Every one of these stations is full on the first night of an outage and empty some while after, and what happens after that depends entirely on what you have to fill it with.

From the wall, between storms. This is the easy part. In UPS mode they simply stay plugged in and stay full, waiting.

From a folding solar panel. A portable panel of a hundred or two hundred watts, laid out in the yard on a clear day, puts back a useful part of a station's charge by evening. Not all of it, on most days, and very little under cloud. But it is silent, it burns nothing, it needs nobody to go out with a gas can, and it is the one refill method that still works in the third week. One of the stations above comes with a small panel already in the box.

From a small generator, by day. This is your day-shift, night-shift idea from the poor man's battery backup, and it works exactly the same way here. The generator runs in the daytime, outside, at least twenty feet from the house. The stations plug into it, one or two at a time, and fill up. At dusk the generator goes off and the stations carry the night.

And here is why the adjustable charging rate matters. Some of these stations can pull well over a thousand watts from whatever they are plugged into while charging at full speed. That is wonderful from a wall outlet. From a small generator, two of them charging flat out at once can be more than the generator can give, and it will stall or trip. Turn the charging speed down in the settings when the station is on the generator, and charge them one after another rather than all together. It takes a little longer. It works.

🔋 Way Two: The Brick Bank, With a Helper

The second way is cheaper for the storage, and it comes with a condition that has to be said at the top: somebody has to wire it. Not an electrician, necessarily. But a son, a neighbour, a friend from church who has put a battery in a boat and knows what a fuse is for.

The pieces are the ones on the poor man's battery backup page. An inverter, a charger, and 12-volt lithium iron phosphate batteries — the ones that look like car batteries, weigh about twenty-something pounds, and in September 2026 were listed at about $126 to $260 each on Walmart's website. One of them holds about as much as one of the power stations above, for a fraction of the price.

So you would think the plan writes itself. Inverter and charger and one battery in the first month, then one more battery every month after that, for a year.

It does not, and the reason is in the battery makers' own instructions.

LiTime, one of the larger makers of these batteries, says to connect in parallel only batteries of the same specifications, capacity and age; to fully charge each one on its own before connecting them together; that most of its batteries allow no more than four in parallel; and that batteries added to a bank are best bought within about a month of the original ones. Other makers say much the same. A bank of batteries is a team, and a team works best when everybody on it is the same age and started on the same day.

That changes the plan, and it is better to know now than after the fourth battery.

With the brick bank, the monthly part is the saving, not the buying. Put the money aside every month in an envelope marked for it. Buy the inverter and the charger first, and the first battery with them, so there is a working system from the start. Then, when the envelope holds enough, buy the rest of the bank — up to four batteries in all — at the same time, the same make and the same model, and have your helper connect them together in one afternoon.

Four 12-volt, 100 amp-hour batteries is about five kilowatt-hours. That is more than four power stations hold, for a good deal less money. The price is that it all lives in one place, it is wired together, and somebody who knows what they are doing has to do the wiring.

⚖️ The Two Ways, Side by Side

Here is the choice laid flat, so it can be made at the kitchen table rather than in the store.

The brick bank total is the inverter and charger ($260–$500), four batteries ($500–$1,040), and the fuse, cables and cord (about $95–$190), all at the prices on the poor man's page.

So the honest summary is short. If you are doing this alone, buy the stations. You will pay more for each kilowatt-hour, and every dollar of the difference is buying you the right to do the whole thing yourself, with no tools, in any order, a month at a time. If you have a good helper and can save up for the batteries, the brick bank gets you more for less. Neither one is the wrong answer. The wrong answer is waiting until you can afford the big one.

⚠️ The Mistakes That Undo It

These are written flat, because every one of them is a way to get hurt or to waste the year's money.

And the quiet mistake, the one that costs nothing and ruins everything: never trying it. Once each station is home, pick a mild evening and run its job from it overnight with the power still on. In the morning, look at what is left on the screen. That number is the only one on this page that is really about your house.

❓ Questions People Ask

💰 Why This Is a Fifty-Year-Old's Errand

There is a particular kind of plan that only works if you start it early, and this is one of them.

A station a month is easy to start and slow to finish. At fifty-five, with a paycheck still coming, a person can buy the first one on a Saturday without thinking twice, and have all four before the next storm season. At seventy-five, on a fixed income, the same plan takes a year or two, and every one of those months is a month the refrigerator is not covered.

Prices do not help, either. Every piece on this page will cost more next year than it does this year. That is not a guess. It is the only direction prices have ever gone.

And there is the part nobody puts on a price tag. A person who owns four small stations, knows which one runs what, and has run each of them for a night on purpose, is a person who can sit through a storm in her own house instead of waiting in a shelter for somebody to decide when she can go home. That is the thing being bought here, a piece at a time.

So the errand is simple. Buy the night lights and the CO alarm this week. Put the first station on the refrigerator this month. And write the other three on the calendar, one to a page, so that the plan is still there on the day the money is.