Onan Battery Charger 300-3522. This part was eventually replaced by 300-5878-13--I'm not sure about compatibility in terms of replacing the 5878 with an older unit.
This item is new old stock. It does have installation instructions and a schematic as well as some connectors and wire leads included with the kit. It's quite heavy, which is reflected in the shipping cost.
I highly encourage consulting with your Cummins/Onan dealer if you have questions. Feel free to contact me as well, but I get a lot of part inquiries.
While we do guarantee that all of our boards and other electronics are in good, working condition, we do not allow returns without a reasonable explanation of how the board was tested. We are fair and reasonable people. However, we can not afford to finance DIY trial and error repairs. Remember, bad electronics are frequently a symptom of a larger problem.
Standard shipping on all small items is USPS Priority. Larger, heavier items will be sent UPS or DHL ground. Items are picked up Monday, Wednesday and Friday by our shipping service, and ship the following business day. I can always expedite shipping at your cost or using your shipping account to save you money--just contact me to make arrangements.
NEED OTHER ONAN/CUMMINS PARTS? This is a part time business for us. What that means is that at any given time we have thousands more part numbers than we have time to get listed. We are slowly working on a formal inventory, but for the foreseeable future there will be many that are simply organized by type or the generator/engine they were used on. We also have many partial and complete units for pulling parts. If you are looking for something, knowing the model and spec of your unit is essential to me finding it as quickly as possible. Please understand that two of our warehouses are more than an hour away and many items require the assistance of my business partner, the owner and expert, to locate and/or remove. While we can sometimes quickly obtain items for an emergency situation, out current arrangement works best when low price is more important than expediency.