Repair/rebalancing of battery packs

NOTE: This service is currently not available, will resume late 2022
Are you suffering from limited range in your Nissan Leaf? Has it started to affect how usable the car is? Want to do something about it? Get in touch for a free estimate.

Individual cell failures are thankfully quite rare. 24kWh Leafs often degrade linearly over time. For these cars, a newer/upgraded battery makes more economical sense compared to the labour intensive process of replacing modules in the current one. However, 30kWh packs can get severely imbalanced over time. The rear stack usually degrades faster than the rest of the battery pack, probably due to heat. For these packs, replacing the degraded cells will restore the car completely. More information on this phenomena can be found here: EVs Enhanced - 30kWh cell failures

Rebalancing of battery packs

Performance upgrades for the LEAF

Dala has pioneered in power modifications for the Nissan LEAF. Everything needed to perform this upgrade has been documented on YouTube, and the code needed is available on Github. By following it, any competent EV mechanic should be able to perform 110kW and 160kW inverter retrofits. Please note that Dala's EV Repair is not taking on customers locally for this upgrade, but will happily supply CAN-bridges via the contact form at the bottom of the page!

Battery upgrades for the Nissan Leaf

NOTE: Upgrading battery in Vaasa is temporarily not available. Will resume later in 2022!

Are you in need of more range from a single charge? Do you want to keep your electric car on the road longer? Do you want to increase the value of your EV? You’re in luck! A battery upgrade might just be the thing for you! Dala´s EV Repair is working hard on offering affordable battery upgrades for the 2011-2020 Nissan Leaf. There are currently two ways of performing a battery upgrade. The first way to upgrade has been around for some time but is being replaced by a newer, safer and quicker way.

History lesson: The ‘Bruteforce’ method relies on putting newer cells into the old battery casing and re-using everything related to the battery management system. The only positive of this swap is that it never causes any pairing issues, and you can upgrade to any lithium modules. The major downside is that this takes many more hours to swap everything out, and when everything is up and running the instrument cluster will show an incorrect range estimation. It also requires extreme caution and skill when doing a deep dive into the battery pack. Also depending on which cells you use, the battery management system will not behave correctly, so we NEVER perform this way of upgrading. See this link for more info

The “Clean” method to upgrade is much quicker and safer. This method works by mounting a CAN-bridge between the new battery and the car, to translate the newer battery pack data to a compatible format for the older car. There are currently a few suppliers that offer some form of this clean upgrade functionality, but we use our own version of the Muxsan CAN bridge to keep down cost. It also enables us to code any specific functionality we want, and allows us to upgrade freely between any Nissan LEAF battery pack size (24/30/40/62kWh)!

30kWhLeaf 30kWh modulesBusbar
Approximate prices
  • Upgrade to 24kWh, 3200€
  • Upgrade to 30kWh, ~4700€
  • Upgrade to 40kWh, ~6800€
  • Upgrade to 62kWh, ~12500€ (Only performed remotely so far)

NOTE: Upgrading battery in Vaasa is temporarily not available. Will resume later in 2022!

We are very flexible. We can source batteries or you can bring your own battery. As previously pointed out, please get in touch for a more correct estimate for your specific situation. Please note that battery availability is low, and it can take 12-24months to order. We can also supply the hardware and instructions needed for you to perform a battery upgrade on your own! Get in touch either way!

I want to do a DIY battery install and need CAN hardware!
I want to order a complete key in hand install (TEMPORARILY NOT AVAILABLE)

Lithium cells for sale

Are you in need of big lithium cells? Maybe complement a solar powerplant with a 10kWh battery? Used EV batteries are perfect for stationary installs. Get in touch for an offer! Selection changes constantly, here are some example prices.

50-90% State of health batteries, leftover from Nissan Leaf upgrades
  • Unfortunately no stock available! Check back later!

Also possible to buy modules separately, but higher price per kWh since it requires more effort to dismantle the batteries!

Lithium battery cell


Reduction gear oil change

NOTE: This service is currently not available, will resume 2022

You might not have noticed, but the Nissan Leaf has a tiny amount of oil in it! The reduction gear that translates power to the driveshafts is filled with ATF ‘Matic S’ fluid. This fluid generally lasts a very long time, but it might be beneficial to change it. By instead opting for a high-quality fluid, like Redline D6, you can lower the friction losses especially in cold climates. On a range limited EV, a few percentages lower losses can even result in a few kilometers of extra range!

Checking this oil is in the service manual every 24k km. (2011-2015 Leaf) Replace it yourself, or have us do it for you? Get in touch!


Redline D6 ATF oil

Aeromod#1: Modular grille-block off plates

Our first own product! Did you know you can squeeze out more range from your Leaf by improving its aerodynamic property? Gone are the days of using tape to aeromod your Leaf, instead use our 3d-printed, easily removable and modular grille block off plates. The front air intake on a Leaf is dimensioned to function in all climates from -40°C to +40°C, but here in Scandinavia you’ll never really need that much cooling. There is no drawback to closing it up, and if a +40°C heatwave strikes, the kit is modular, and a middle section can be removed.

3d-print them yourself we are offering the .STL files below free of charge😊

Download STL files from GitHub
Download STL files from Thingiverse
Plates installed on AZE0

Leaf Battery to OBD2 cable

Here's something for the tinkerer! If you want to check the health status of a Leaf battery pack (maybe before buying one?) you need some way to connect to it. Gone are the days of searching high and low for a suitable connector, just grab our .STL file and 3d-print one!

Check the link below for detailed instructions, schematics and a download link to the .STL file!

Download STL files from GitHub
Plug in use

BatterySaver v1.1

There are multiple ways to slow down lithium battery degradation over time. The most effective way is to keep the battery operating as cold as possible. Since the entire LEAF lineup is passively cooled, your only way of achieving this is by using the car in a cold climate. But what else can you do to prevent degradation? It is a well known fact that lithium batteries last longer when they spend less time fully charged.

Introducing the BatterySaver. It's a fully customizable maximum charge limiter, extending on the one that was originally shipped with 2011-2013 LEAFs. The OEM limiter only allowed setting two limiters, 80 and 100%. The BatterySaver can set the max charge percentage in three steps, 83, 92 and 100 %

The BatterySaver software will be available on every CAN-bridge that Dala's EV Repair installs, free of charge.

Open Vehicle Monitoring System V3

NOTE: Local install is currently not available, will resume late 2022

Start heating remotely on any Gen1 Leaf? Monitor vehicle data in real time? Keep track of where you parked your car? If any sound like something you'd need, OVMS v3 is the product for you. Smartphone apps for both Android and iPhone. Did we mention it's open source software AND hardware?!

Native integration for the following vehicles

  • Fiat 500e
  • Kia e-Niro / Hyundai Kona
  • Kia Soul EV
  • Mitsubishi Trio (i-MiEV et al)
  • Nissan Leaf
  • Renault Twizy
  • Renault Zoe
  • Smart ED Gen.3
  • Smart ED/EQ Gen.4 (453)
  • Tesla Model S
  • Tesla Roadster

OVMS can be installed the DIY way, or you can let us do the heavy lifting. Get in touch for an estimate for your car.



I'm Daniel and the founder of Dala´s EV Repair. The garage is currently situated in Vaasa, Finland. If you have any questions you can contact me using the form below. Finnish, Swedish or English works 🙂

Please note that I am not taking on local installs at the moment, I simply don't have time. Check back in 2022 🙂 For BatteryUpgrade CAN-bridge orders, please use the form below

You can also check out more about us on our social media channels:



I am a huge fan of EVs. I truly believe this is the future for all types of transportation. I started Dala's EV Repair in 2019 when I found out just how expensive lithium battery replacements were. I was also not pleased with the locked down ecosystems all carmakers have when it comes to battery replacements. This prevents third-party shops from fixing cars up for a low cost. Having only expensive battery replacements will scare off potential EV-adopters, and even make people treat cars with a bad battery as disposable! Dala's EV Repair aims to correct this and even offer battery upgrades, which makes old EVs as desirable as new long range ones.

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