A Black Friday "deal" is often a normal price next to an inflated list price. Here a DC-DC charger only counts as on sale when its checked price is at least 15% below its own typical price over the last 90 days, from our price history. The best-rated models are listed too, since many are good value without a sale.
On sale now
No DC-DC charger rated 3.8 or higher is 15% or more below its typical price at the last price check (October 31, 2026). Prices are rechecked through the sales; this list updates when one drops. See the recent price changes.
Best buys at their normal price
The top-rated models in each current. A sale on one of these is worth more than a big discount on a weaker model.
Best DC-DC Chargers up to 30 A
- Victron Orion-Tr Smart 12/12-30#1 of 9Full review
For boats and vans that need an isolated charger from a brand with a long track record. Buyers who don’t need isolation get more current and efficiency from the Orion XS.
Amazon $177.15$177.1530 ANo87% - Renogy DCC30S 30A DC-DC MPPT#2 of 9Full review
For smaller vans and truck campers with a 100 Ah battery and a panel or two on the roof. Bigger banks or arrays need the 50 A DCC50S.
Amazon $186.99$186.9930 AMPPT, up to 400 W97% - Victron Orion-Tr Smart 12/12-18 Isolated#3 of 9Full review
For boats and vehicles that need an isolated charger, or anyone who wants Victron Bluetooth and a 5 year warranty on a small house bank.
Off Grid Stores $162.19$162.1918 ANo87%
Best 40 A and Up DC-DC Chargers
- Victron Orion XS 12/12-50#1 of 22Full review
The best all-round alternator charger for most vans and RVs with a 12 V lithium bank. It is small, very efficient and fully configurable from a phone.
Amazon Inverters R Us $328.10$328.1050 ANo98.5% - Victron Orion XS 1400#2 of 22Full review
For mixed voltage setups, such as a 24 V truck charging a 12 V camper bank or a 12 V van with a 24 V house system.
Off Grid Stores $356.15$356.1550 ANo98.5% - Renogy PRO 50A DC-DC MPPT IP67#3 of 22Full review
For boats, trucks and engine bay installs that need a sealed charger with solar and Bluetooth.
Amazon $399.99$399.9950 AMPPT, up to 750 W94%
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.