A rugged, regulated converter for owners who value clean DC power and want to add the right charge controller themselves. Budget for an IQ controller if you want real battery charging.
Amazon $217.28The IOTA DLS-30 rates 2.0 among standalone RV converter chargers; the Progressive Dynamics PD4635V rates 2.0 among panel and drop-in ones. The IOTA DLS-30 costs $66.32 less ($217.28 vs $283.60).

A proven fix for a dead converter in an older Parallax, Magnetek or WFCO power center that still runs lead acid batteries.
Amazon $283.60Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different build classes (standalone and panel and drop-in), and each is scored against the reference points for its own class, so a rating says how well each does among its own build peers. How we rank explains each factor.
| Factor weight | IOTA DLS-30 | Progressive Dynamics PD4635V |
|---|---|---|
| Overall rating | 2.0/5 | 2.0/5 |
| Value 35% | 6 $7.24 per amp ($217.28, 30 A) | 0 $8.10 per amp ($283.60, 35 A) |
| Output 10% | 0 30 A | 10 35 A |
| Features 30% | 20 fan runs only as needed | 20 multi-stage charging |
| Warranty 25% | 25 2-year warranty | 25 2-year warranty |
Specifications
| IOTA DLS-30 | Progressive Dynamics PD4635V | |
|---|---|---|
| Charging | ||
| Output | 30 A | 35 A |
| Lithium mode | No | No |
| Multi-stage charging | No | Yes |
| Build | ||
| Build | Standalone | Panel or drop-in |
| Fan runs only as needed | Yes | - |
| Remote or display | No | No |
| Weight | 4.5 lb | 9 lb |
| Warranty | 2 years | 2 years |