Name: PowerMax PM3-100LK
Brand: PowerMax
Price: 175.00 USD

4.0/5#1 of 17 in standalone RV converters
4.0

A low cost standalone converter for owners who are comfortable setting a charge voltage by hand. Its high output suits a large lithium bank.

Price checked November 3, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros

Among the lowest prices per amp of any brand-name converter
Adjustable fixed voltage mode lets you set the exact charge voltage your lithium battery maker asks for
Proportional fan stays quiet at light load
Enough output to recharge a 100 Ah battery in roughly an hour and a half or less while running loads

Cons

Lithium charging is a manual fixed voltage setting, so a mistake with a lead acid battery can overcharge it
Two year warranty
Pulls up to 15 A from the AC side, so it can trip a shared 15 A circuit

How it scores

The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its build. How we rank explains each one.

Specifications

A low cost standalone converter for owners who are comfortable setting a charge voltage by hand. Its high output suits a large lithium bank.

$189

A low cost standalone converter for owners who are comfortable setting a charge voltage by hand. Its high output suits a large lithium bank.

$149

The pick for an RV owner who wants a lithium ready deck mount converter with a remote pendant in the box. Its 80 A output suits a big lithium bank.

$290