7 Days to Die: How to Get Solar Banks and Maximize Power Output

Solar banks can’t be crafted — you get them from traders or solar bank bundles found in high-tier loot containers and as mission rewards. Once you have one, slot up to 6 solar cells inside, place the unit in direct sunlight, and wire it to your devices using a Wire Tool. The catch: solar banks only generate power during daylight hours, so any base running purely on solar will go dark the moment night hits.

That limitation matters more than most guides admit. Below is everything you need — acquisition routes, cost-cutting tricks, cell mechanics, wiring steps, and a real solution for the night gap.

How to Obtain Solar Banks

There are exactly two ways to get a solar bank: buy one from a trader, or open a solar bank bundle. That’s it. No workbench recipe exists, no skill unlocks crafting — this is purely a loot-tier item.

Solar bank bundles drop as mission rewards from high-difficulty quests or inside elite loot containers at the end of hard POIs. Think Shamway Factory, Skyscraper, or Shotgun Messiah Factory — the kind of POI that routinely spawns ferals and radiated enemies in the final room. The bundle can contain a solar bank and sometimes solar cells in the same package, which makes it the most efficient single acquisition method.

Traders will stock solar banks, but availability is tied directly to your loot stage. In the early game — weeks one through three — the odds of seeing one in a trader’s inventory are low enough that you shouldn’t count on it. As your loot stage climbs naturally through gameplay, the chances improve. Investing points into the Daring Adventurer perk accelerates this by bumping your loot stage faster than normal progression allows.

When a solar bank does appear at a trader, it won’t be cheap. The exact price varies by trader tier and your current barter modifiers, but expect it to hurt. Three things reduce the cost significantly when stacked together:

Better Barter perk — invest points here before any major trader purchase
Preacher Hat — equip it specifically for the transaction
Grandpa’s Awesome Sauce — consume one right before opening the trader UI

The combination of all three can shave a meaningful percentage off the sticker price. It’s worth timing your purchase around these buffs rather than buying the moment you see one listed.

Acquisition Method	Availability	Player Control	Notes
Solar Bank Bundle (loot container)	Late-game POIs	Medium — target hard POIs	Can include solar cells too
Solar Bank Bundle (mission reward)	High-difficulty quests	High — queue the right missions	Most reliable farming route
Trader purchase	Loot-stage dependent	Low early, High late	Stack Barter + Preacher Hat + Sauce to reduce cost

Finding and Using Solar Cells

Solar cells are, frankly, harder to acquire than the bank itself. Same two acquisition channels apply — traders and solar bank bundles — but cells tend to appear less frequently than the bank unit, and you need multiple of them to get meaningful output.

The solar bank has six slots for solar cells. Each slot accepts one cell, and cell level directly determines how much power that slot contributes. A single level-1 cell in an otherwise empty bank gives you noticeably less wattage than six level-6 cells running at full capacity. The relationship is both additive (more cells = more total output) and multiplicative in practice (higher-tier cells scale disproportionately better).

Community testing suggests a fully loaded bank with six high-level cells can output enough power to run lights, turrets, and electric fence posts simultaneously — though exact wattage numbers vary depending on the specific cell quality level and game version. As of the 1.0 release build, the maximum theoretical output with six max-level cells is substantial enough to cover a well-designed base’s daytime load without supplemental generation.

“The solar bank bundle is the sleeper reward in high-tier POIs — most players loot it and don’t realize it might contain cells alongside the bank unit itself.”

One practical note: don’t hold out for a full set of six cells before deploying your bank. Even one or two cells generating partial power is useful while you accumulate more. Slot what you have, wire it up, and upgrade the cells incrementally as better ones appear.

Early game, before you’ve hit a loot stage where solar gear appears reliably, generator banks are the practical alternative. They can be crafted at a workbench once you have the recipe, accept fuel, and — critically — run day and night. Use generators as your primary power source in the first few weeks, and treat solar as an upgrade layer rather than a replacement decision.

Wiring Your Solar Bank to Power Devices

Placement first, then wiring. The solar bank needs unobstructed access to skylight — placing it inside a roofed structure, under an overhang, or blocked by terrain means zero power output. Put it on your roof, on an elevated platform, or in an open courtyard area. If you’re unsure whether placement is valid, the bank’s UI will reflect whether it’s receiving sunlight when you interact with it during daytime.

To create any wire connection in 7 Days to Die, you need a Wire Tool. These drop from loot containers, come as mission rewards, or can occasionally be bought from traders. With the Wire Tool in hand:

Equip the Wire Tool and look at the solar bank
Left-click to begin a wire connection from the bank’s output node
Move to the target device (light, turret, relay, etc.) and left-click again to complete the connection
For complex setups, use a Battery Bank or a second relay as a distribution hub so multiple devices pull from a single source
Put the Wire Tool away — all wires become invisible, but connected devices remain powered

A point that trips up new players: wires are invisible when the Wire Tool is holstered. Your turrets and lights will still work exactly as expected. Re-equip the Wire Tool any time you need to inspect or modify connections — it’ll show you the full current flow of every wired object nearby.

For larger bases, run the solar bank output into a power relay first. The relay acts as a distribution point, letting you branch power to different base zones without running individual wires from the bank to every single device. This keeps your wiring logic clean and makes troubleshooting easier when something stops drawing power.

Managing Day/Night Power Cycles

Here’s the honest limitation: solar banks go offline at night. Full stop. Any device running exclusively off solar power loses that power the moment the sun drops. For a turret covering your base entrance, that’s a serious problem — zombie hordes don’t follow business hours.

So the real question isn’t “how do I set up solar power” but “how do I handle the hours when solar isn’t generating.” There are two practical approaches, and most established players end up running both.

Option 1: Zone your devices by usage pattern. Lights for interior crafting areas, farm plots, and anything you only actively use during the day can run on solar without issue. You’re awake, the sun is up, everything works. Reserve those devices for solar-only circuits and don’t stress about the night gap for them.

Option 2: Hybrid setup with a generator bank. Wire your generator bank as a secondary power source. When solar drops off at night, the generator takes over. This requires fuel — gas cans, and ideally a steady supply of it — but it keeps your turrets, electric fences, and alarm triggers live through the night when you actually need them most.

The hybrid setup is, genuinely, what you want for any defensive infrastructure. Solar handles your daytime load and reduces generator fuel consumption dramatically — you’re only burning gas during night hours instead of around the clock. That’s a real resource saving once you’re in the mid-to-late game and fuel supply is manageable.

One edge case worth knowing: if you log off during daytime and log back in at night, devices on solar-only circuits will be offline when you return. Not a bug — expected behavior. Just factor it in when you’re setting up anything that needs to be active regardless of when you’re online.

Quick Reference: Solar Bank Setup at a Glance

Step	What to Do	Key Detail
1. Acquire solar bank	Trader purchase or solar bank bundle	Stack Barter perk + Preacher Hat + Grandpa’s Awesome Sauce for lower trader price
2. Get solar cells	Same sources; aim for highest level available	Up to 6 cells; higher level = more output per slot
3. Place the bank	Open rooftop or platform with direct sky access	No roof overhead; bank UI confirms sunlight status
4. Slot cells	Open bank inventory, place cells in available slots	Partial loadout still generates — don’t wait for all 6
5. Wire devices	Use Wire Tool to connect bank to devices or relay	Wires invisible when tool holstered; still functional
6. Handle night gap	Add generator bank for nighttime power continuity	Solar for day load; generator for defense overnight

Solar banks are a genuine mid-to-late game upgrade — not a replacement for generator infrastructure, but a meaningful complement to it. Run them together, zone your devices sensibly, and you’ll burn significantly less fuel while keeping your defenses live when the blood moon rolls in.