Warranty: Allison Hybrid Bus Battery ESS3 with BRAND NEW Cells for 60 (sixty) months, unlimited mileage, and the original service purchased. View Product Warranty

Shipping: The cost of shipping to you is included with your purchase. This offer is good for the entire continental United States. Add $200 for shipping to a residential address. Let Greentec Auto make it simple to return your core to us, ask about our reduced return shipping rates.

Core Charge/Deposit: A refundable "core deposit" of $5000.00 will be added to your order at checkout. Once we receive your old Allison Hybrid Bus Battery, we will refund the core deposit back to you minus the cost of return shipping. Cores must be returned within 45 days of purchase. This applies to shipping orders only. In all other circumstances, the core will be picked up at the time of service, no deposit required.

How do I return my old hybrid battery? Once your new hybrid battery has arrived, put the core battery back into the same packaging your battery arrived in. As soon as we receive your core battery, we will refund the core deposit back to you. It’s that easy.

Have one to sell? We are always on the lookout for these packs and refresh kits to rebuild. If you have one that you done need we are happy to purchase it. Depending on which model you have and what condition it is in. Email ess@greentecauto.com with which version you have, how many you have, and a few pictures. We will get back to you with a quote. It’s that easy.

In-Shop Installation: Visit one of our many locations across the country and have one of our highly trained technicians ensure your new hybrid battery is installed properly.

Mobile Installation: The ultimate convenience for you! Let one of our extensively trained technicians come to your location and install your new hybrid battery!