Skip to content
Fall into savings with 5% off orders over $500 | Use code FALL26 at checkout
5% off orders over $500 | code FALL26

COMVOLT 30A DC-DC Alternator Charger, Wall Charger and Extension Cable

Original price $60.00 - Original price $159.00
Original price
$159.00
$60.00 - $159.00
Current price $159.00
Authorized dealer, sourced direct

Reserve Power Co. is an authorized dealer for every brand we carry.  For more information on our brand partners click here.

Price match guarantee

If you find a better price elsewhere, we will match it.  Find out more here.

Free shipping in 1-3 business days

Every order receives free standard shipping.  Click here for more shipping and here for more returns information.

Manufacturer-backed warranty

All products sold by Reserve Power Co. include full manufacturer warranties, serviced directly by the brand.  For more information on Reserve Power Co.'s warranty policy,click here.

30-day returns

Return or exchange within 30 days of delivery. Items must be unused, uninstalled, and in original packaging.

Defective, damaged, or wrong item: we cover return shipping, with no restocking fee.

Change of mind: return shipping and any restocking fee depend on the brand.

Start a return by emailing support@reservepowerco.com with your order number. We reply within 1 business day.

See full return policy

Spare and add-on chargers for Comvolt power stations. The 30A DC-DC car charger is the same alternator charger that ships with every Comvolt station: it takes power from your vehicle while you drive and charges the battery with a LiFePO4 charging profile. Add a second wall charger to use both XT90 inputs at once, which Comvolt says doubles AC charging speed, or extend your car charger's reach with the extension cable.

Options:

  • 30A DC-DC car charger
  • Wall charger
  • Car charger extension cable

Best for: Faster AC charging with a second wall charger • Replacing or adding an alternator charger • Dual-battery vehicle setups

WHY RPC? Reserve Power Co. is an authorized Comvolt dealer, and this genuine Comvolt product ships directly from Comvolt, see our sourcing documentation here. Free U.S. shipping. Price match guaranteed. Backed by Comvolt's 1-year manufacturer warranty on accessories.

Product Authenticity This is a genuine Comvolt product, supplied to Reserve Power Co. directly by Comvolt Energy under our authorized dealer relationship. Shipped new from Comvolt's U.S. warehouse in original manufacturer packaging.

Specifications (30A DC-DC car charger, model WG-12C400L)

  • Input: 10 to 36V DC
  • Output: 14.6V DC, 30A, LiFePO4 CC/CV charging profile
  • Efficiency: up to 96%
  • Protection: over-voltage, over-temperature, over-current and short circuit
  • Design: non-isolated, natural cooling, LED charging indicator
  • Warranty: 1 year (accessories)

Specifications shown are the manufacturer's published figures. Product photography is supplied by the manufacturer and used with permission as an authorized dealer.

Free Shipping

All The Time. Period.

Returns and Exchanges

Return or Exchange within 30 days for eligible orders

Price Match Guarantee

If you find a better price elsewhere, we will meet that price.

Authorized Dealer

For Every Brand We Carry

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare
Description

Spare and add-on chargers for Comvolt power stations. The 30A DC-DC car charger is the same alternator charger that ships with every Comvolt station: it takes power from your vehicle while you drive and charges the battery with a LiFePO4 charging profile. Add a second wall charger to use both XT90 inputs at once, which Comvolt says doubles AC charging speed, or extend your car charger's reach with the extension cable.

Options:

  • 30A DC-DC car charger
  • Wall charger
  • Car charger extension cable

Best for: Faster AC charging with a second wall charger • Replacing or adding an alternator charger • Dual-battery vehicle setups

WHY RPC? Reserve Power Co. is an authorized Comvolt dealer, and this genuine Comvolt product ships directly from Comvolt, see our sourcing documentation here. Free U.S. shipping. Price match guaranteed. Backed by Comvolt's 1-year manufacturer warranty on accessories.

Product Authenticity This is a genuine Comvolt product, supplied to Reserve Power Co. directly by Comvolt Energy under our authorized dealer relationship. Shipped new from Comvolt's U.S. warehouse in original manufacturer packaging.

Specifications (30A DC-DC car charger, model WG-12C400L)
  • Input: 10 to 36V DC
  • Output: 14.6V DC, 30A, LiFePO4 CC/CV charging profile
  • Efficiency: up to 96%
  • Protection: over-voltage, over-temperature, over-current and short circuit
  • Design: non-isolated, natural cooling, LED charging indicator
  • Warranty: 1 year (accessories)

Specifications shown are the manufacturer's published figures. Product photography is supplied by the manufacturer and used with permission as an authorized dealer.

Shipping & Returns

Shipping

Processing & Transit Times

All orders are processed within 1–3 business days after payment confirmation. Orders placed after 3:00 PM Pacific Time may begin processing the following business day. You will receive a tracking number by email once your order ships.

Estimated delivery is 2–7 business days after shipment, depending on your location and the fulfillment center your order ships from. Larger items may ship via freight and can take up to 10 business days.

Pre-Order Items

Items marked "Pre-order" are not yet in stock. The estimated ship date appears on the product page, in your cart, and in your order confirmation.

Payment: A deposit, shown on the product page, is charged at checkout. The remaining balance is charged to your saved payment method before your order ships. We'll email you before the balance is charged.

Shipping: Pre-order items ship once stock arrives, on or around the estimated date. Standard transit times (2–7 business days) apply after shipment, and shipping is free as with all orders.

Orders with in-stock items: In-stock items ship within the standard shipping window stated above. Pre-order items ship separately when available, at no extra cost.

Delays: If the estimated ship date changes, we'll email you the new date. You can cancel for a full refund, including your deposit, at any time before your order ships.

Declined balance payments: If the balance can't be charged, we'll contact you to update your payment method. If payment isn't received within 5 business days, the order may be canceled and your deposit refunded.

Order Tracking

Click here for easy order tracking and real-time delivery information.

Shipping Rates

Free standard shipping on all orders to the contiguous United States. We do not currently ship to Alaska, Hawaii, Puerto Rico, or U.S. territories.

Carriers

We ship via UPS, FedEx, and DHL, depending on product size and your location. You will receive carrier and tracking information by email once your order ships.

Freight & Oversized Items

Some products — particularly large power stations and solar kits — may ship via freight carrier. If your order ships freight, you may be contacted to schedule delivery. Please inspect your shipment at the time of delivery and note any visible damage on the carrier's delivery receipt before signing.

Damaged or Lost Shipments

Report damaged or missing shipments to us within 48 hours of delivery (or expected delivery date). Include photos of the product and packaging. Contact us at support@reservepowerco.com or (424) 250-6208.

Contact

Email: support@reservepowerco.com

Phone: (424) 250-6208

Hours: Monday-Friday, 9am-5pm Pacific Time