WFCO RV Lithium Battery Converter w/Auto-Detect - 9800 Series - 35 Amp - WF-9835-AD

$299.99 $174.99
Brand: WFCO
SKU: WF-9835-AD

Product Description: Online Price Only

WF-9835-AD, WF-9835-AD-CB

The WF-9800-AD Series now includes an industry first, Patent Pending Auto-Detect technology. This new microprocessor driven technology will recognize lithium ion and lead acid battery chemistries and automatically adjust the charging profile to match the battery type. No more buttons. No more switches. RV owners will have the peace of mind that their batteries will be accurately charged, eliminating the risk of over and under charging. Additionally, with multi-stage charging and current monitoring in both lead acid and lithium profiles, battery life will be maximized.


2 Year WFCO Manufacturer Limited Warranty. Extended warranty offer also available when you add to cart and proceed to check out.






Max. Input Current @ 105VAC

WF-9835-AD – 7A

Max Power

WF-9835-AD – 600 watt

Continuous Power

WF-9835-AD – 475 watt

Rated DC Output Voltage

13.6 V / 14.6 V

Rated DC Current

WF-9835-AD – 35A

Charging Control

Automatically Controlled by Microprcessor

Charging Modes

33-Stage Intelligent Charge / 2-Stage Intelligent Charge

Intelligent Charge Mode

Absorption, Bulk and Storage / Absorption and Bulk Mode

Battery Adaptability

LA & AGM / Lithium ion

Absorption Charge Voltage

13.6 V

Bulk Charge Voltage - 4 Hours

14.4 V / 14.6 V

Storage Charge Voltage

13.2 V / X


+/-1% accuracy against input or load changes

Cooling Fan

Speed according to the DC load amperage

VA Efficiency

.80% (under 70% of load condition)


Current-limiting and shut down; auto recovery upon return to normal load


Shut down and auto recovery upon return to normal load


Shut down and auto recovery upon return to normal load

Battery Reverse Polarity

Protected by fuse; same rated fuse replacement required

DC Battery Lugs - NEG-, POS+

Lugs accept 2 AWG to 14 AWG wire; lug screws are 5/16″ Allen head





Dimensions - W x H x D

WF-9835-AD – 4 5/8 x 4 x 7.5 inch/117.5 x 101.6 x 190.5 mm


WF-9835-AD – 4 lb. / 1.8 kg

Environmental Conditions

20-90% non-condensing


UL458 certified; FCC Class B compliant