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Selling a Used Home Battery: Powerwall, GivEnergy and BYD

How to sell a used or surplus home battery such as a Tesla Powerwall, GivEnergy or BYD Battery-Box: removal, health data, warranty, shipping and price.

Reviewed by ReBattery
Reviewed by ReBattery · 6 October 2026
Reading time
6 min read

You can sell a used home battery such as a Tesla Powerwall, GivEnergy or BYD Battery-Box. It should be disconnected by a qualified electrician, and the buyer will want the model, age, capacity and a state-of-health reading from the app or installer portal. Installers and second-life buyers pay most for complete, working units with data; single units also sell through marketplaces, and anything unusable goes to a licensed recycler.

Applies to: Lithium-ion home and small commercial batteries in the UK and EU, used or new surplus, sold singly or in batches. The removal and reinstallation work itself must be done by competent electricians.

Used home batteries have a real resale market. Installers need replacements for discontinued models, off-grid and second-life builders want affordable capacity, and some buyers reinstall units in new homes. Batteries leave homes for ordinary reasons: a house sale or renovation, a system upgrade, a warranty swap, or an installer with surplus stock.

What sells is a complete, working unit with its paperwork and a recent health reading. What doesn't is a battery with no data, missing parts, or a history no one can explain.

Can you sell a used Powerwall, GivEnergy or BYD battery?

Yes. The popular models all have buyers. Common examples:

BatteryTypical capacityWhat buyers check first
Tesla Powerwall 213.5 kWh usable, about 114 kgGateway included, app access, firmware, warranty status
GivEnergy All in One and GIV-BAT unitsModel-dependent, check the labelInverter compatibility, portal data, generation
BYD Battery-Box HVS and HVMModular, from about 5 kWh per towerNumber of modules, BMU included, matching module dates

Capacities vary by version, so always quote the model and the label rating rather than a family name.

How to sell a used home battery, step by step

  1. Get a health reading before it comes off the wall. Screenshot the app or installer portal: state of health or capacity, cycle count if shown, firmware version and any active alarms. This is the most useful thing a buyer can see.
  2. Have it disconnected properly. A qualified electrician should isolate and remove the battery. In the UK, storage that runs in parallel with the grid is notified to the network operator under the Energy Networks Association's G98 or G99 rules, so tell the installer the unit is being removed.
  3. Keep the system together. Gateways, BMS units, inverters, cables and mounting brackets are worth far more with the battery than without it.
  4. Check the warranty. Some manufacturers only keep a warranty valid if the unit is reinstalled by an approved installer. Tell buyers what you know; an unclear warranty is not a deal breaker, but a surprise is.
  5. Pack and ship it as dangerous goods. Lithium-ion batteries usually travel as UN3480 under ADR rules by road. Units are heavy, so plan for a pallet, a tail-lift and a carrier that handles the class.

Where to sell a used home battery

RouteGood forWatch out for
A specialist marketplace or brokerBatches, installer surplus, higher-value unitsFees; check who arranges collection
The original or a local installerOne unit, quick removalTrade-in prices can be low
Classified ads and eBaySingle working unitsCollection, buyer checks and payment risk are on you
A licensed recyclerDamaged or unsupported unitsUsually a cost or a small rebate, not a sale

What affects the price

  • Model and demand. Widely installed, still-supported models sell fastest.
  • Age and health. Fewer cycles and a high state of health mean a better offer.
  • Completeness. Gateway, BMS, inverter and brackets included.
  • Warranty position. Remaining, transferable warranty adds value.
  • Quantity. Installers and integrators pay more for several matching units.
  • Collection. Units that are already removed, palletised and easy to reach cost buyers less to collect.

Questions

Question: Can I sell my Tesla Powerwall when I sell my house?

Short answer: You can either leave it with the house, which usually adds to the sale, or remove and sell it separately. If you remove it, a qualified installer should disconnect it, and you should keep the Gateway with the battery.

Question: Is a used home battery worth anything if it's out of warranty?

Short answer: Often, yes. Buyers price on health and completeness. A working unit with a good state of health still sells; a faulty one may only be worth its recycling value.

Question: Do I need to show a state of health?

Short answer: It isn't required, but it is the main thing buyers use to price a battery. A screenshot from the app or installer portal is usually enough.

Question: Can installers sell surplus or returned batteries?

Short answer: Yes. New, boxed surplus and warranty returns sell well, especially in matching batches with their paperwork.

Sources